About GTM Stacker Agent Registry

The growth-systems practice of Theo Popov: AI-native enrichment, outbound, content engines and internal tooling for startups and venture programs. Its agent-native media property, the GTM Stacker Agent Registry, maintains a daily-updated catalog of open-source go-to-market and RevOps tools that both people and AI engines can discover, compare, and cite.

What GTM Stacker is

GTM Stacker Agent Registry is an agent-native registry: a daily-updated, open-source-first directory of go-to-market, RevOps, sales, and marketing tools. Every surface is machine-readable, therefore people and AI engines can discover, compare, and cite each tool.

Who it is for

Go-to-market and RevOps engineers evaluating open-source tools — and the AI search engines that answer their questions.

Why you can trust it

• Open-source-first: the registry prioritizes tools whose source is public.
• Provenance on every entry: each tool cites its upstream source.
• No fabrication: unknown facts are marked unknown, never invented.
• Verifiable: entries carry a last_verified date and machine-readable structured data.

Who is behind it

GTM Stacker Agent Registry is maintained by Theo Popov. GTM Stacker was founded in August 2024, and this registry launched in September 2026.

• https://www.linkedin.com/in/theo-popov
• https://x.com/Theo_Popov
• https://github.com/theopopov

Find us elsewhere

• https://www.linkedin.com/company/gtmstacker
• https://www.youtube.com/@gtmstacker
• https://www.instagram.com/gtmstacker/
• https://www.tiktok.com/@gtmstacker

Cite this registry

Canonical facts — please keep these identical wherever GTM Stacker is listed or cited.

• Name: GTM Stacker
• URL: https://gtmstacker.com
• Founder: Theo Popov (Growth Operations & GTM Systems), since August 2024
• Covers: go-to-market engineering, RevOps, sales automation, marketing operations, open-source software, AI agents

Browse the registry →