The Stack Index / Action Surface / Slack
Action Surface · serves Motion
Slack
Slack is used in the action surface layer by 7 operators documented on GTM Vault, including Alexander Shartsis, Skyp, where it ran as the notification and alerting layer over MCP.
Updated 1 Oct 2026, the date of the latest episode or confirmation citing Slack. Cite as: GTM Vault, The Stack Index, “Slack”, https://pro.gtmvault.co/stack/tool/slack, updated 1 Oct 2026.
Who named it, and what it did
One entry per episode. Mentions in passing, sponsor reads and guest biographies are not counted.
- SMYS 2operator evidenceAlexander Shartsis, Skyp
Notification and alerting layer over MCP
- GTM 16operator evidenceAmos Bar-Joseph, Swan AI
Interface the agent runs through
- GTM 13operator evidenceYuhong Sun, Danswer
Deployment surface for query resolution
- SMYS 3operator evidenceGarrett Wolfe, 1GTM
Team alert when an account crosses the high-tier score
- SMYS 5operator evidenceUmar Farooq Adam, Hitachi Vantara
Rep notification fired by Outreach activity webhooks
- SMYS 7operator evidenceAngelo Quiambao, Intellistack
Natural-language trigger for the query agent where reps work in Slack
- SMYS 9operator evidenceMichael Bartimer, Clarify
Website Visitors channel, visibility as step one of the play
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 Slack. The count is how many of those operators run both.
Others in action surface
Are you Slack? Show the record
The badge states the record and nothing more: how many operators named Slack on GTM Vault. It updates itself when the count changes. It is free, it changes nothing about placement or order, and the only condition is that it links back to this page.
<a href="https://pro.gtmvault.co/stack/tool/slack"><img src="https://pro.gtmvault.co/stack/badge/slack.svg" alt="Slack: named by 7 operators on the GTM Vault Stack Index" height="28"></a>
Common questions
- Which operators use Slack?
- 7 operators on GTM Vault have described running Slack in a working system: Alexander Shartsis (Skyp), Amos Bar-Joseph (Swan AI), Yuhong Sun (Danswer), Garrett Wolfe (1GTM), Umar Farooq Adam (Hitachi Vantara), Angelo Quiambao (Intellistack) and Michael Bartimer (Clarify). Each entry is one citation per episode, in the operator's own words. Alexander Shartsis, Skyp described it as the notification and alerting layer over MCP (SMYS 2).
- What layer of revenue architecture does Slack serve?
- Slack is placed on the Action Surface layer, which serves Motion in the eight-layer model of revenue architecture. Where the rep or agent works, and where sends actually go out. Placement follows the job the tool did in an operator's system, not the category its marketing claims.
- What runs alongside Slack?
- In the stacks of operators who run Slack, the tools that appear most often are Claude Code (4), Apollo (3), Clay (2), Salesforce (2) and Instantly (1). The number is how many of those operators run both.
- What entry tier is Slack?
- Slack is listed at the mid-market tier. The index records budget as a posture (self-serve, mid-market, enterprise), not a price, because public pricing in this category is unreliable.