# The Stack Index by GTM Vault

> Every GTM tool named by an operator on GTM Vault, placed on the layer of revenue architecture it served. 102 tools, 66 named by an operator running them in a working system, 24 operator pages. One citation per episode. Operator evidence is never blended with essay evidence. Placement is not for sale. Updated 2026-10-20.

Cite as: GTM Vault, The Stack Index, https://pro.gtmvault.co/stack, updated 2026-10-20. Data export: https://pro.gtmvault.co/stack/stack.json and https://pro.gtmvault.co/stack/stack.csv (CC BY 4.0).

## Start here
- [The index](https://pro.gtmvault.co/stack): the eight layers in build order with every tool hung off the layer it serves
- [Method](https://pro.gtmvault.co/stack/method): inclusion rules, the two grades of evidence, what cannot be bought
- [State of the Operator Stack, Q3 2026](https://pro.gtmvault.co/stack/report/2026-q3): quarterly frozen snapshot with counts per layer, consensus tools, displacements and new tools
- [Glossary](https://pro.gtmvault.co/stack/glossary): revenue architecture, GTM architecture, AI-native GTM, the revenue architect, the GTM engineer, the eight layers, operator evidence, consensus, displacement
- [Audit](https://pro.gtmvault.co/stack/audit): eight questions that name the layer where a revenue system is breaking
- [Build Your Stack](https://pro.gtmvault.co/stack/build): layers in build order for a revenue band, motion, constraint and budget
- [Operators](https://pro.gtmvault.co/stack/operators): every operator who described a working system, with their stack by layer

## What operators run, by count
- [The tools GTM engineers run, by operator count](https://pro.gtmvault.co/stack/most-run/gtm-engineering): On the GTM Vault record, 16 operators described running 17 tools across the enrichment and resolution layer, the signal layer, the reasoning layer and the orchestration layer. Ordered by how many operators run each: Claude Code (8), Clay (7), Claude (4), ChatGPT (2), Cursor (2). The number in brackets is operators on the record, not reviews, traffic or revenue.
- [The enrichment and data tools operators run, by operator count](https://pro.gtmvault.co/stack/most-run/enrichment-and-data): On the GTM Vault record, 10 operators described running 13 tools across the source layer and the enrichment and resolution layer. Ordered by how many operators run each: Clay (7), Apollo (6), Apify (2), Lead Magic (2), ZoomInfo (2). The number in brackets is operators on the record, not reviews, traffic or revenue.
- [The outbound tools operators run, by operator count](https://pro.gtmvault.co/stack/most-run/outbound): On the GTM Vault record, 16 operators described running 23 tools across the source layer, the enrichment and resolution layer and the action surface layer. Ordered by how many operators run each: Clay (7), Apollo (6), Slack (5), Instantly (4), Apify (2). The number in brackets is operators on the record, not reviews, traffic or revenue.
- [The AI tools operators run in their GTM stack, by operator count](https://pro.gtmvault.co/stack/most-run/ai-and-agents): On the GTM Vault record, 13 operators described running 8 tools across the reasoning layer and the orchestration layer. Ordered by how many operators run each: Claude Code (8), Claude (4), ChatGPT (2), Cursor (2), Microsoft Power Platform (1). The number in brackets is operators on the record, not reviews, traffic or revenue.

## Comparisons
- [Clay vs ZoomInfo](https://pro.gtmvault.co/stack/vs/clay-vs-zoominfo): On the GTM Vault record, Clay is run by 7 operators and ZoomInfo by 2. Clay sits on the enrichment and resolution layer and ZoomInfo on the source layer, so they do different jobs and can run in the same stack. 1 operator runs both. No operator on the record has replaced one with the other.
- [Apollo vs ZoomInfo](https://pro.gtmvault.co/stack/vs/apollo-vs-zoominfo): On the GTM Vault record, Apollo is run by 6 operators and ZoomInfo by 2. Both sit on the source layer, so they compete for the same job. 1 operator runs both. No operator on the record has replaced one with the other.
- [Clay vs Apollo](https://pro.gtmvault.co/stack/vs/clay-vs-apollo): On the GTM Vault record, Clay is run by 7 operators and Apollo by 6. Clay sits on the enrichment and resolution layer and Apollo on the source layer, so they do different jobs and can run in the same stack. 3 operators run both. No operator on the record has replaced one with the other.
- [HubSpot vs Salesforce](https://pro.gtmvault.co/stack/vs/hubspot-vs-salesforce): On the GTM Vault record, HubSpot is run by 3 operators and Salesforce by 3. Both sit on the system of record layer, so they compete for the same job. No operator on the record has replaced one with the other.
- [Claude Code vs Clay](https://pro.gtmvault.co/stack/vs/claude-code-vs-clay): On the GTM Vault record, Claude Code is run by 8 operators and Clay by 7. Claude Code sits on the reasoning layer and Clay on the enrichment and resolution layer, so they do different jobs and can run in the same stack. 2 operators run both. No operator on the record has replaced one with the other.
- [Claude Code vs Cursor](https://pro.gtmvault.co/stack/vs/claude-code-vs-cursor): On the GTM Vault record, Claude Code is run by 8 operators and Cursor by 2. Both sit on the reasoning layer, so they compete for the same job. 2 operators run both. No operator on the record has replaced one with the other.
- [Claude Code vs ChatGPT](https://pro.gtmvault.co/stack/vs/claude-code-vs-chatgpt): On the GTM Vault record, Claude Code is run by 8 operators and ChatGPT by 2. Both sit on the reasoning layer, so they compete for the same job. No operator on the record has replaced one with the other.
- [Claude vs ChatGPT](https://pro.gtmvault.co/stack/vs/claude-vs-chatgpt): On the GTM Vault record, Claude is run by 4 operators and ChatGPT by 2. Both sit on the reasoning layer, so they compete for the same job. 1 operator runs both. No operator on the record has replaced one with the other.
- [Instantly vs Lemlist](https://pro.gtmvault.co/stack/vs/instantly-vs-lemlist): On the GTM Vault record, Instantly is run by 4 operators and Lemlist by 2. Both sit on the action surface layer, so they compete for the same job. No operator on the record has replaced one with the other.
- [Instantly vs Outreach](https://pro.gtmvault.co/stack/vs/instantly-vs-outreach): On the GTM Vault record, Instantly is run by 4 operators and Outreach by 2. Both sit on the action surface layer, so they compete for the same job. No operator on the record has replaced one with the other.
- [Apollo vs LinkedIn Sales Navigator](https://pro.gtmvault.co/stack/vs/apollo-vs-sales-navigator): On the GTM Vault record, Apollo is run by 6 operators and LinkedIn Sales Navigator by 1. Both sit on the source layer, so they compete for the same job. 1 operator runs both. No operator on the record has replaced one with the other.

## Definitions
- [Revenue architecture](https://pro.gtmvault.co/stack/glossary#revenue-architecture): Revenue architecture is the structural design of a revenue system: positioning, pricing, motion, RevOps and AI workflows, and the order they are built in. It treats revenue as a system with layers that read from each other, so a failure in a lower layer surfaces as noise in every layer above it.
- [GTM architecture](https://pro.gtmvault.co/stack/glossary#gtm-architecture): GTM architecture is the structural design of a go-to-market system: identity, sequencing, pricing, functional coherence, motion, distribution, metrics and the AI layer, and the order in which they are built. It is the same discipline this index calls revenue architecture. The difference between the two terms is vocabulary, not substance: both describe designing the system that produces revenue, rather than running the plays that sit on top of it.
- [AI-native GTM](https://pro.gtmvault.co/stack/glossary#ai-native-gtm): A revenue system is AI-native when the work happens behind a trigger the rep already touches, rather than inside a tool the rep has to open, learn and choose to use. AI-assisted GTM puts the model in front of the human and inherits every adoption problem software has ever had. AI-native puts it behind the system, where the architecture runs whether or not anyone changes their behaviour.
- [Revenue architect](https://pro.gtmvault.co/stack/glossary#revenue-architect): The person with authority over the decisions every other revenue decision inherits: identity, sequencing, pricing, functional coherence and motion. The test is not job title or seniority, it is what happens when they conclude a layer is wrong. If the layer changes, they hold the role. If a recommendation gets scheduled for discussion, someone else does.
- [GTM engineer](https://pro.gtmvault.co/stack/glossary#gtm-engineer): The person who builds and runs the revenue system: the workflows, pipelines, agents and integrations. The architect decides what the system should be and in what order it gets built; the GTM engineer builds it. One is a design function, the other an engineering function, and conflating them produces systems built precisely to the wrong specification.
- [The eight layers](https://pro.gtmvault.co/stack/glossary#eight-layers): The eight layers of a modern revenue system, in build order, are Identity, Sequencing, Pricing, Functional Coherence, Motion, Distribution, Metrics and the AI Layer. Each layer reads everything beneath it, which is why the order of construction, not the list of tools, decides what the system produces.
- [Identity](https://pro.gtmvault.co/stack/glossary#identity): Identity is who the revenue system is for, defined tangibly enough to disqualify an account in real time, from data, without a call. It is the first layer because every layer above it inherits its precision or its vagueness.
- [Sequencing](https://pro.gtmvault.co/stack/glossary#sequencing): Sequencing is the decision about what gets built and scaled, and in what order. It is the one layer that takes no instrumentation, because no product performs that decision; a tool that claims to handle sequencing is describing workflow order inside itself, which is orchestration.
- [Pricing](https://pro.gtmvault.co/stack/glossary#pricing): Pricing, as a layer, is not a number. It is a structural decision that reshapes qualification, motion and margin, and it shows up two quarters later where nobody has a dashboard for it.
- [Functional coherence](https://pro.gtmvault.co/stack/glossary#functional-coherence): Functional coherence is whether each function in the company optimises the whole revenue system or only its own metric. Orchestration tools and the system of record report to this layer, because they are where a documented process becomes one that happens.
- [Motion](https://pro.gtmvault.co/stack/glossary#motion): Motion is how the company sells, and whether the playbook matches the stage it is in now. Signal and action-surface tools report to this layer.
- [Distribution](https://pro.gtmvault.co/stack/glossary#distribution): Distribution is whether channels compose into a system or accumulate into a pile. Positioning that never ships at scale is a document, not a layer.
- [Metrics](https://pro.gtmvault.co/stack/glossary#metrics): Metrics, as a layer, is whether the numbers compound understanding or conceal decay. Forecast accuracy is structural, not a spreadsheet exercise, which is why Metrics is fixed after Identity and never before it.
- [AI Layer](https://pro.gtmvault.co/stack/glossary#ai-layer): The AI Layer is the agents and models installed on top of the seven layers below. They inherit whatever state those layers are in, so an agent on a vague Identity layer produces confident noise at scale.
- [Operator evidence](https://pro.gtmvault.co/stack/glossary#operator-evidence): Operator evidence is a citation where a named operator described running a tool in a working system on a GTM Vault episode, one citation per episode, in their own words. It is the only grade of evidence that counts a tool as operator verified, and it is never blended with essay evidence.
- [Essay evidence](https://pro.gtmvault.co/stack/glossary#essay-evidence): Essay evidence is a tool recommended in a GTM Vault essay with no operator on the record describing it. It is opinion rather than reporting, shown in gold on the index, and never used to call a top pick.
- [Consensus tool](https://pro.gtmvault.co/stack/glossary#consensus-tool): A consensus tool is one named by two or more operators running it in working systems. Only consensus tools are called a top pick in Build Your Stack, because one operator is an anecdote and two is the start of a pattern.
- [Displacement](https://pro.gtmvault.co/stack/glossary#displacement): A displacement is recorded when an operator says on an episode that one tool replaced another in their stack. It goes on the record with the operator's name beside it and is never inferred from usage data or reviews.
- [Budget posture](https://pro.gtmvault.co/stack/glossary#budget-posture): Budget posture is the tier a tool enters at: self-serve, mid-market or enterprise. The index records posture instead of price because public pricing in this category is unreliable, so no dollar figure appears anywhere.
- [Guest vendor](https://pro.gtmvault.co/stack/glossary#guest-vendor): A guest vendor is a product named on an episode because its founder was the guest. An appearance is not an endorsement, so guest vendors are excluded from every recommendation and listed separately on the method page.

## Layers
- [Source](https://pro.gtmvault.co/stack/layer/source): Where raw records enter: companies, people, firmographics, scraped listings. Serves Identity. 13 tools, 11 operator verified.
- [Enrichment and Resolution](https://pro.gtmvault.co/stack/layer/enrichment-and-resolution): Waterfall enrichment, dedupe, entity matching across sources. Serves Identity. 2 tools, 2 operator verified.
- [Signal](https://pro.gtmvault.co/stack/layer/signal): What changed and when: intent, reviews, hiring, monitoring. Serves Motion. 14 tools, 7 operator verified.
- [Context](https://pro.gtmvault.co/stack/layer/context): The persistent account memory other surfaces read from. Serves AI Layer. 11 tools, 10 operator verified.
- [Reasoning](https://pro.gtmvault.co/stack/layer/reasoning): The models and agent runtimes that score, decide, draft and build. Serves AI Layer. 6 tools, 6 operator verified.
- [Orchestration](https://pro.gtmvault.co/stack/layer/orchestration): What runs the sequence between systems without a human in the loop. Serves Functional Coherence. 3 tools, 2 operator verified.
- [Action Surface](https://pro.gtmvault.co/stack/layer/action-surface): Where the rep or agent works, and where sends actually go out. Serves Motion. 15 tools, 10 operator verified.
- [System of Record](https://pro.gtmvault.co/stack/layer/system-of-record): The ledger the business commits to and reports from. Serves Functional Coherence. 4 tools, 3 operator verified.
- [Measurement](https://pro.gtmvault.co/stack/layer/measurement): What happened, and what closes next. Serves Metrics. 4 tools, 3 operator verified.
- [Channels and Content](https://pro.gtmvault.co/stack/layer/channels-and-content): Where the argument is published and paid for at volume. Serves Distribution. 29 tools, 12 operator verified.
- [Monetization](https://pro.gtmvault.co/stack/layer/monetization): Quote, billing, and revenue recognition mechanics. Serves Pricing. 1 tools, 0 operator verified.

## Operators
- [Alexander Shartsis, Skyp](https://pro.gtmvault.co/stack/operator/alexander-shartsis): 11 tools on record, SMYS 2
- [Umar Farooq Adam, Hitachi Vantara](https://pro.gtmvault.co/stack/operator/umar-farooq-adam): 11 tools on record, SMYS 5
- [Michele Shepard, Emburse](https://pro.gtmvault.co/stack/operator/michele-shepard): 10 tools on record, GTM 31
- [Charles Cormier, TopLeads](https://pro.gtmvault.co/stack/operator/charles-cormier): 8 tools on record, GTM 19
- [Tim Scheuer, Oxygen](https://pro.gtmvault.co/stack/operator/tim-scheuer): 8 tools on record, SMYS 6
- [Angelo Quiambao, Intellistack](https://pro.gtmvault.co/stack/operator/angelo-quiambao): 7 tools on record, SMYS 7
- [Garrett Wolfe, OneGTM](https://pro.gtmvault.co/stack/operator/garrett-wolfe): 6 tools on record, SMYS 3
- [Jason Patel, Open Forge AI](https://pro.gtmvault.co/stack/operator/jason-patel): 6 tools on record, GTM 34
- [Michael Bartimer, Clarify](https://pro.gtmvault.co/stack/operator/michael-bartimer): 6 tools on record, SMYS 9
- [Riley Timmins, Kintsugi](https://pro.gtmvault.co/stack/operator/riley-timmins): 5 tools on record, SMYS 10
- [Vinayak Mishra, Slang AI](https://pro.gtmvault.co/stack/operator/vinayak-mishra): 5 tools on record, SMYS 1
- [Mark van Oppen, SecureAuth](https://pro.gtmvault.co/stack/operator/mark-van-oppen): 4 tools on record, Confirmed Sep 2026
- [Elliot O'Connor, Frontier](https://pro.gtmvault.co/stack/operator/elliot-o-connor): 3 tools on record, SMYS 8
- [Jai Toor, DeepLine](https://pro.gtmvault.co/stack/operator/jai-toor): 3 tools on record, SMYS 4
- [Joseph Lee, Supademo](https://pro.gtmvault.co/stack/operator/joseph-lee): 3 tools on record, GTM 44
- [Nick Velkovski, HeyReach](https://pro.gtmvault.co/stack/operator/nick-velkovski): 3 tools on record, GTM 14
- [Vignesh Ravichandran, MyClone](https://pro.gtmvault.co/stack/operator/vignesh-ravichandran): 3 tools on record, GTM 35
- [Gorish Aggarwal, Sybill](https://pro.gtmvault.co/stack/operator/gorish-aggarwal): 2 tools on record, GTM 48
- [Amos Bar-Joseph, Swan AI](https://pro.gtmvault.co/stack/operator/amos-bar-joseph): 1 tools on record, GTM 16
- [Harsha Gaddipati, Slashy](https://pro.gtmvault.co/stack/operator/harsha-gaddipati): 1 tools on record, GTM 30
- [Michael Saruggia, Clay Operator](https://pro.gtmvault.co/stack/operator/michael-saruggia): 1 tools on record, GTM 21
- [Parthi Loganathan, Letterdrop](https://pro.gtmvault.co/stack/operator/parthi-loganathan): 1 tools on record, GTM 3
- [Sriharsha Guduguntla, Hyperbound](https://pro.gtmvault.co/stack/operator/sriharsha-guduguntla): 1 tools on record, GTM 1
- [Yoni Tserruya, Lusha](https://pro.gtmvault.co/stack/operator/yoni-tserruya): 1 tools on record, GTM 50

## Tools
- [Claude Code](https://pro.gtmvault.co/stack/tool/claude-code): Claude Code is used in the reasoning layer by 8 operators documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the orchestration environment in plan mode. Updated 2026-10-20.
- [Clay](https://pro.gtmvault.co/stack/tool/clay): Clay is used in the enrichment and resolution layer by 7 operators documented on GTM Vault, including Vinayak Mishra, Slang AI, where it ran as the master data layer, three tables. Updated 2026-09-08.
- [Apollo](https://pro.gtmvault.co/stack/tool/apollo): Apollo is used in the source layer by 6 operators documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the contact data and email enrichment via API. Updated 2026-09-24.
- [Slack](https://pro.gtmvault.co/stack/tool/slack): Slack is used in the action surface layer by 5 operators documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the notification and alerting layer over MCP. Updated 2026-10-01.
- [Claude](https://pro.gtmvault.co/stack/tool/claude): Claude is used in the reasoning layer by 4 operators documented on GTM Vault, including Vinayak Mishra, Slang AI, where it ran as the true or false relevance check on negative reviews, with reasoning. Updated 2026-10-20.
- [Instantly](https://pro.gtmvault.co/stack/tool/instantly): Instantly is used in the action surface layer by 4 operators documented on GTM Vault, including Tim Scheuer, Oxygen, where it ran as the email sending and sequencing. Updated 2026-10-01.
- [HubSpot](https://pro.gtmvault.co/stack/tool/hubspot): HubSpot is used in the system of record layer by 3 operators documented on GTM Vault, including Jai Toor, DeepLine, where it ran as the win and loss lists pulled from here. Updated 2026-10-20.
- [LinkedIn](https://pro.gtmvault.co/stack/tool/linkedin): LinkedIn is used in the channels and content layer by 3 operators documented on GTM Vault, including Vignesh Ravichandran, MyClone, where it ran as the primary distribution and demand channel. Updated 2025-12-28.
- [Salesforce](https://pro.gtmvault.co/stack/tool/salesforce): Salesforce is used in the system of record layer by 3 operators documented on GTM Vault, including Yoni Tserruya, Lusha, where it ran as the system of record the AEs have largely stopped opening, feeding a custom dashboard. Updated 2026-09-24.
- [Apify](https://pro.gtmvault.co/stack/tool/apify): Apify is used in the source layer by 2 operators documented on GTM Vault, including Vinayak Mishra, Slang AI, where it ran as the pre-built actor aggregating review sites. Updated 2026-04-02.
- [ChatGPT](https://pro.gtmvault.co/stack/tool/chatgpt): ChatGPT is used in the reasoning layer by 2 operators documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the generative engine optimised for. Updated 2025-11-23.
- [Cursor](https://pro.gtmvault.co/stack/tool/cursor): Cursor is used in the reasoning layer by 2 operators documented on GTM Vault, including Alexander Shartsis, Skyp, where it runs Claude Code with parallel agents. Updated 2026-04-19.
- [Gong](https://pro.gtmvault.co/stack/tool/gong): Gong is used in the measurement layer by 2 operators documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the conversation intelligence. Updated 2026-08-11.
- [Lead Magic](https://pro.gtmvault.co/stack/tool/lead-magic): Lead Magic is used in the source layer by 2 operators documented on GTM Vault, including Garrett Wolfe, OneGTM, where it ran as the first call in the enrichment waterfall. Updated 2026-06-14.
- [Lemlist](https://pro.gtmvault.co/stack/tool/lemlist): Lemlist is used in the action surface layer by 2 operators documented on GTM Vault, including Jai Toor, DeepLine, where it ran as the verified leads exported into campaigns. Updated 2026-04-26.
- [Marketo](https://pro.gtmvault.co/stack/tool/marketo): Marketo is used in the channels and content layer by 2 operators documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the marketing automation fed from the scored account list. Updated 2026-05-26.
- [Outreach](https://pro.gtmvault.co/stack/tool/outreach): Outreach is used in the action surface layer by 2 operators documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the outbound sequencing. Updated 2026-05-26.
- [Reddit](https://pro.gtmvault.co/stack/tool/reddit): Reddit is used in the channels and content layer by 2 operators documented on GTM Vault, including Vignesh Ravichandran, MyClone, where it ran as the credibility and demand source. Updated 2026-04-19.
- [ZoomInfo](https://pro.gtmvault.co/stack/tool/zoominfo): ZoomInfo is used in the source layer by 2 operators documented on GTM Vault, including Mark van Oppen, SecureAuth, where it ran as the account and contact data at SecureAuth, in heavy use. Updated 2026-09-24.
- [Adobe Journey Optimizer](https://pro.gtmvault.co/stack/tool/adobe-journey-optimizer): Adobe Journey Optimizer is used in the channels and content layer by 1 operator documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the marketing automation alongside Marketo. Updated 2026-05-26.
- [Ahrefs](https://pro.gtmvault.co/stack/tool/ahrefs): Ahrefs is used in the signal layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the competitive and SEM intelligence. Updated 2026-04-07.
- [AppSumo](https://pro.gtmvault.co/stack/tool/appsumo): AppSumo is used in the channels and content layer by 1 operator documented on GTM Vault, including Nick Velkovski, HeyReach, where it ran as the launch marketplace, $400K in seven days. Updated 2024-09-15.
- [BetterContact](https://pro.gtmvault.co/stack/tool/bettercontact): BetterContact is used in the enrichment and resolution layer by 1 operator documented on GTM Vault, including Tim Scheuer, Oxygen. Named as a likely vendor in the email waterfall. Updated 2026-06-14.
- [Bombora](https://pro.gtmvault.co/stack/tool/bombora): Bombora is used in the signal layer by 1 operator documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the third-party intent ingested into Clay. Updated 2026-06-07.
- [Canva](https://pro.gtmvault.co/stack/tool/canva): Canva is used in the channels and content layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the slides, mockups and logos. Updated 2026-04-07.
- [Capterra](https://pro.gtmvault.co/stack/tool/capterra): Capterra is used in the channels and content layer by 1 operator documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the review source seeded for citation. Updated 2025-11-23.
- [Chili Piper](https://pro.gtmvault.co/stack/tool/chili-piper): Chili Piper is used in the action surface layer by 1 operator documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the meeting routing and scheduling. Updated 2026-05-26.
- [Clay MCP](https://pro.gtmvault.co/stack/tool/clay-mcp): Clay MCP is used in the context layer by 1 operator documented on GTM Vault, including Elliot O'Connor, Frontier, where it ran as the agent access to Clay tables. Updated 2026-09-08.
- [Consensus](https://pro.gtmvault.co/stack/tool/consensus): Consensus is used in the measurement layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse. Named in the enablement and video stack. Updated 2025-10-26.
- [ContactOut](https://pro.gtmvault.co/stack/tool/contactout): ContactOut is used in the source layer by 1 operator documented on GTM Vault, including Charles Cormier, TopLeads, where it ran as the contact data alongside Apollo. Updated 2025-05-13.
- [Databricks](https://pro.gtmvault.co/stack/tool/databricks): Databricks is used in the context layer by 1 operator documented on GTM Vault, including Angelo Quiambao, Intellistack, where it ran as the data platform the agent layer reads and writes. Updated 2026-08-11.
- [Demandbase](https://pro.gtmvault.co/stack/tool/demandbase): Demandbase is used in the signal layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the account intelligence and ABM. Updated 2025-10-26.
- [G2](https://pro.gtmvault.co/stack/tool/g2): G2 is used in the signal layer by 1 operator documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the review source seeded so engines cite the brand. Updated 2026-06-07.
- [Gmail](https://pro.gtmvault.co/stack/tool/gmail): Gmail is used in the context layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the inbox history over MCP, used to drop anyone already emailed. Updated 2026-04-07.
- [Goldcast](https://pro.gtmvault.co/stack/tool/goldcast): Goldcast is used in the channels and content layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the events and content. Updated 2025-10-26.
- [Google Search Console](https://pro.gtmvault.co/stack/tool/google-search-console): Google Search Console is used in the measurement layer by 1 operator documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the first setup step for GEO measurement. Updated 2025-11-23.
- [Graft](https://pro.gtmvault.co/stack/tool/graft): Graft is used in the system of record layer by 1 operator documented on GTM Vault, including Riley Timmins, Kintsugi, where it ran as the data warehouse and pipeline centralising ad data and HubSpot data; the store the custom ad manager reads and writes. Updated 2026-10-20.
- [Grain](https://pro.gtmvault.co/stack/tool/grain): Grain is used in the context layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the meeting recordings queried for context. Updated 2026-04-07.
- [Granola](https://pro.gtmvault.co/stack/tool/granola): Granola is used in the context layer by 1 operator documented on GTM Vault, including Harsha Gaddipati, Slashy, where it ran as the meeting notes and follow-up tracking. Updated 2025-10-12.
- [HeyGen](https://pro.gtmvault.co/stack/tool/heygen): HeyGen is used in the channels and content layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the AI video generation. Updated 2025-10-26.
- [Heyreach](https://pro.gtmvault.co/stack/tool/heyreach): Heyreach is used in the action surface layer by 1 operator documented on GTM Vault, including Garrett Wolfe, OneGTM, where it ran as the linkedIn automation path in two-path campaign routing. Updated 2026-04-14.
- [HG Insights](https://pro.gtmvault.co/stack/tool/hg-insights): HG Insights is used in the source layer by 1 operator documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the firmographic waterfall alongside ZoomInfo and Clay. Updated 2026-05-26.
- [Intercom](https://pro.gtmvault.co/stack/tool/intercom): Intercom is used in the context layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the support content as auto-documentation. Updated 2026-04-07.
- [LinkedIn Sales Navigator](https://pro.gtmvault.co/stack/tool/linkedin-sales-navigator): LinkedIn Sales Navigator is used in the source layer by 1 operator documented on GTM Vault, including Garrett Wolfe, OneGTM, where it ran as the research and prospecting. Updated 2026-04-14.
- [Loom](https://pro.gtmvault.co/stack/tool/loom): Loom is used in the channels and content layer by 1 operator documented on GTM Vault, including Vignesh Ravichandran, MyClone, where it ran as the one-minute personalized demo videos for LinkedIn outbound. Updated 2025-12-28.
- [Meta Ads](https://pro.gtmvault.co/stack/tool/meta-ads): Meta Ads is used in the channels and content layer by 1 operator documented on GTM Vault, including Riley Timmins, Kintsugi, where it ran as the launch surface for the custom ad manager: account list uploaded, campaign duplicated, about 90% of the clicks saved per launch. Updated 2026-10-20.
- [Microsoft Power Platform](https://pro.gtmvault.co/stack/tool/microsoft-power-platform): Microsoft Power Platform is used in the orchestration layer by 1 operator documented on GTM Vault, including Umar Farooq Adam, Hitachi Vantara, where it ran as the wires the systems together. Updated 2026-05-26.
- [n8n](https://pro.gtmvault.co/stack/tool/n8n): n8n is used in the orchestration layer by 1 operator documented on GTM Vault, including Vinayak Mishra, Slang AI, where it ran as the star-rating keep or drop gate, then routing on Claude's true or false relevance verdict. Updated 2026-04-02.
- [Namecheap](https://pro.gtmvault.co/stack/tool/namecheap): Namecheap is used in the action surface layer by 1 operator documented on GTM Vault, including Charles Cormier, TopLeads, where it ran as the domain and sending infrastructure. Updated 2025-05-13.
- [Nooks](https://pro.gtmvault.co/stack/tool/nooks): Nooks is used in the action surface layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the sales calling surface. Updated 2025-10-26.
- [NotebookLM](https://pro.gtmvault.co/stack/tool/notebooklm): NotebookLM is used in the context layer by 1 operator documented on GTM Vault, including Michele Shepard, Emburse, where it ran as the analysis notebook. Updated 2025-10-26.
- [Notion](https://pro.gtmvault.co/stack/tool/notion): Notion is used in the context layer by 1 operator documented on GTM Vault, including Michael Bartimer, Clarify, where it ran as the spec doc the PQL agent was built from, after team review. Updated 2026-10-01.
- [OpenClaw](https://pro.gtmvault.co/stack/tool/openclaw): OpenClaw is used in the reasoning layer by 1 operator documented on GTM Vault, including Gorish Aggarwal, Sybill, where it runs five personal agents. Updated 2026-08-16.
- [Perplexity](https://pro.gtmvault.co/stack/tool/perplexity): Perplexity is used in the channels and content layer by 1 operator documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the AI search surface tracked. Updated 2025-11-23.
- [Persana](https://pro.gtmvault.co/stack/tool/persana): Persana is used in the source layer by 1 operator documented on GTM Vault, including Charles Cormier, TopLeads, where it ran as the lead intelligence feeding outbound. Updated 2025-05-13.
- [PostHog](https://pro.gtmvault.co/stack/tool/posthog): PostHog is used in the signal layer by 1 operator documented on GTM Vault, including Michael Bartimer, Clarify, where it ran as the product usage data, about half the signals in the PQL score. Updated 2026-10-01.
- [Prospeo](https://pro.gtmvault.co/stack/tool/prospeo): Prospeo is used in the source layer by 1 operator documented on GTM Vault, including Tim Scheuer, Oxygen. Named as a likely vendor in the email waterfall. Updated 2026-06-14.
- [Relevance AI](https://pro.gtmvault.co/stack/tool/relevance-ai): Relevance AI is used in the reasoning layer by 1 operator documented on GTM Vault, including Angelo Quiambao, Intellistack, where it hosts the multi-agent system behind the rep-facing checkbox. Updated 2026-08-11.
- [Salesforce MCP](https://pro.gtmvault.co/stack/tool/salesforce-mcp): Salesforce MCP is used in the context layer by 1 operator documented on GTM Vault, including Elliot O'Connor, Frontier, where it ran as the CRM over Model Context Protocol. Updated 2026-09-08.
- [SendGrid](https://pro.gtmvault.co/stack/tool/sendgrid): SendGrid is used in the action surface layer by 1 operator documented on GTM Vault, including Charles Cormier, TopLeads, where it ran as the email delivery. Updated 2025-05-13.
- [Serper.dev](https://pro.gtmvault.co/stack/tool/serper-dev): Serper.dev is used in the source layer by 1 operator documented on GTM Vault, including Vinayak Mishra, Slang AI, where it ran as the google Maps scraping for venue discovery. Updated 2026-04-02.
- [Stripe](https://pro.gtmvault.co/stack/tool/stripe): Stripe is used in the context layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the customer list retrieval and dedupe over MCP. Updated 2026-04-07.
- [Trigify](https://pro.gtmvault.co/stack/tool/trigify): Trigify is used in the signal layer by 1 operator documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the linkedIn signal monitoring. Updated 2026-04-07.
- [Vector](https://pro.gtmvault.co/stack/tool/vector): Vector is used in the signal layer by 1 operator documented on GTM Vault, including Michael Bartimer, Clarify, where it ran as the website de-anonymization, payload ingested by webhook into the visitor agent. Updated 2026-10-01.
- [Vieu](https://pro.gtmvault.co/stack/tool/vieu): Vieu is used in the source layer by 1 operator documented on GTM Vault, including Mark van Oppen, SecureAuth, where it ran as the relationship paths into enterprise accounts at SecureAuth, in heavy use. Updated 2026-09-24.
- [Zapmail](https://pro.gtmvault.co/stack/tool/zapmail): Zapmail is used in the action surface layer by 1 operator documented on GTM Vault, including Tim Scheuer, Oxygen, where it ran as the inbox provisioning and email infrastructure. Updated 2026-06-14.
- [6sense](https://pro.gtmvault.co/stack/tool/6sense): 6sense sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-04-29.
- [Attention](https://pro.gtmvault.co/stack/tool/attention): Attention sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Attio](https://pro.gtmvault.co/stack/tool/attio): Attio sits in the system of record layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [bolt.new](https://pro.gtmvault.co/stack/tool/bolt-new): bolt.new sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Bonjoro](https://pro.gtmvault.co/stack/tool/bonjoro): Bonjoro sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Breakcold](https://pro.gtmvault.co/stack/tool/breakcold): Breakcold sits in the action surface layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Cal.com](https://pro.gtmvault.co/stack/tool/cal-com): Cal.com sits in the action surface layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Chameleon](https://pro.gtmvault.co/stack/tool/chameleon): Chameleon sits in the action surface layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Common Room](https://pro.gtmvault.co/stack/tool/common-room): Common Room sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Dreamdata](https://pro.gtmvault.co/stack/tool/dreamdata): Dreamdata sits in the measurement layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [ElevenLabs](https://pro.gtmvault.co/stack/tool/elevenlabs): ElevenLabs sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Framer](https://pro.gtmvault.co/stack/tool/framer): Framer sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-12.
- [FullEnrich](https://pro.gtmvault.co/stack/tool/fullenrich): FullEnrich sits in the source layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Gamma](https://pro.gtmvault.co/stack/tool/gamma): Gamma sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Happenstance](https://pro.gtmvault.co/stack/tool/happenstance): Happenstance sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Hyperline](https://pro.gtmvault.co/stack/tool/hyperline): Hyperline sits in the monetization layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [KickoffLabs](https://pro.gtmvault.co/stack/tool/kickofflabs): KickoffLabs sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Limitless](https://pro.gtmvault.co/stack/tool/limitless): Limitless sits in the context layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Lindy](https://pro.gtmvault.co/stack/tool/lindy): Lindy sits in the orchestration layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [LinkedIn Ads](https://pro.gtmvault.co/stack/tool/linkedin-ads): LinkedIn Ads sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Lovable](https://pro.gtmvault.co/stack/tool/lovable): Lovable sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Napkin AI](https://pro.gtmvault.co/stack/tool/napkin-ai): Napkin AI sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-05-13.
- [Navattic](https://pro.gtmvault.co/stack/tool/navattic): Navattic sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Passionfroot](https://pro.gtmvault.co/stack/tool/passionfroot): Passionfroot sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Pocus](https://pro.gtmvault.co/stack/tool/pocus): Pocus sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-11-12.
- [PredictLeads](https://pro.gtmvault.co/stack/tool/predictleads): PredictLeads sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [Product Hunt](https://pro.gtmvault.co/stack/tool/product-hunt): Product Hunt sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [RB2B](https://pro.gtmvault.co/stack/tool/rb2b): RB2B sits in the signal layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.
- [ScoreApp](https://pro.gtmvault.co/stack/tool/scoreapp): ScoreApp sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Senja](https://pro.gtmvault.co/stack/tool/senja): Senja sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Storylane](https://pro.gtmvault.co/stack/tool/storylane): Storylane sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Typeform](https://pro.gtmvault.co/stack/tool/typeform): Typeform sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-12.
- [Userpilot](https://pro.gtmvault.co/stack/tool/userpilot): Userpilot sits in the action surface layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Waalaxy](https://pro.gtmvault.co/stack/tool/waalaxy): Waalaxy sits in the action surface layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-06.
- [Webflow](https://pro.gtmvault.co/stack/tool/webflow): Webflow sits in the channels and content layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2025-06-12.
- [Wiza](https://pro.gtmvault.co/stack/tool/wiza): Wiza sits in the source layer of the GTM Vault instrumentation index. It is recommended in GTM Vault essays, and no operator on the record has described running it. Updated 2026-03-27.

## Source publication
- [GTM Vault](https://www.gtmvault.co): essays and episodes the index is built from
- [Show Me Your Stack podcast](https://pro.gtmvault.co/shows/show-me-your-stack): the series that adds an operator stack every two weeks, every episode listed
- [The Library](https://pro.gtmvault.co/library): every episode as a written playbook with the full transcript, free, no sign-in