The Stack Index / Source / Apollo
Source · serves Identity
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.
Who named it, and what it did
One entry per episode. Mentions in passing, sponsor reads and guest biographies are not counted.
Contact data and email enrichment via API
Operator evidence · SMYS 2MCPs vs APIs in a Production Enrichment PipelineThe episode →
Garrett WolfeOneGTMContact database
Operator evidence · SMYS 3From Clay Tables to Intent HQ: Building the BDR Action LayerThe episode →
Angelo QuiambaoIntellistackPrevious role at Qualified: prospecting data wrapped as an agent via its API
Operator evidence · SMYS 7Your Reps Should Never Meet Your AgentsThe episode →
Mark van OppenSecureAuthContact data at SecureAuth, in heavy use
Operator evidence · Confirmed Sep 2026
Tim ScheuerOxygenNamed as a likely vendor in the email waterfall
Operator evidence · SMYS 6From Five Hours in Clay to Forty Minutes in a Terminal: Outbound Run by Claude CodeThe episode →
Charles CormierTopLeadsContact data for podcast-led outbound
Operator evidence · GTM 19Cold Email as a GTM Engine, Not a Volume PlayThe episode →
Run the system yourself
Outbound run from Claude CodeFree Claude skill, built from Tim Scheuer’s system on SMYS 6 →Cold email as a GTM engineFree Claude skill, built from Charles Cormier’s system on GTM 19 →MCP and API enrichment pipelineFree Claude skill, built from Alexander Shartsis’s system on SMYS 2 →Agents behind the repFree Claude skill, built from Angelo Quiambao’s system on SMYS 7 →For the Apollo team
6 operators put Apollo on the record.
Each operator above described Apollo running inside a working revenue system, in their own words, one citation per episode. The record is yours to share.
Placement, order and counts are never for sale. How the index works.
Share the record
Free. It states the count and nothing else, and updates itself, so it can go down as well as up. The only condition is that it links back to this page.
Add a customer
Put a customer forward for Show Me Your StackA customer walks through the system they built with Apollo. If it holds up, it goes on the record.
See which stacks this tool shows up in next
Every Show Me Your Stack episode adds operators and tools to this index. Subscribe to GTM Vault and get each one as it lands.
Runs alongside
Tools that appear in the same operators’ stacks as Apollo. The count is how many of those operators run both.
Compared on the record
Who runs each, who runs both, and the displacements operators said out loud. Counts, not opinions.
Others in source
Common questions
- Which operators use Apollo?
- 6 operators on GTM Vault have described running Apollo in a working system: Alexander Shartsis (Skyp), Garrett Wolfe (OneGTM), Angelo Quiambao (Intellistack), Mark van Oppen (SecureAuth), Tim Scheuer (Oxygen) and Charles Cormier (TopLeads). Each entry is one citation per episode, in the operator's own words. Alexander Shartsis, Skyp described it as the contact data and email enrichment via API (SMYS 2).
- What layer of revenue architecture does Apollo serve?
- Apollo is placed on the Source layer, which serves Identity in the eight-layer model of revenue architecture. Where raw records enter: companies, people, firmographics, scraped listings. Placement follows the job the tool did in an operator's system, not the category its marketing claims.
- What runs alongside Apollo?
- In the stacks of operators who run Apollo, the tools that appear most often are Claude Code (4), Clay (3), Slack (2), Instantly (2) and Salesforce (2). The number is how many of those operators run both.
- What entry tier is Apollo?
- Apollo is listed at the self-serve tier. The index records budget as a posture (self-serve, mid-market, enterprise), not a price, because public pricing in this category is unreliable.