Does Zest use OpenAI?
Probably
We hold good evidence for this, but not the strongest kind.
- The company's privacy policy names it as a processor, controller or partner.
How we know
About Zest
Zest provides AI coding analytics for engineering teams, tracking the agents, models and skills behind merged pull requests. It serves engineering teams using tools such as Claude Code, Codex, Cursor and Copilot.
Summarized from its homepage on 12 Nov 2026.
What else Zest uses
Zest has evidence for 12 vendors. The strongest:
Cloudflare
OpenRouter
PostHog
Resend
Stripe
Supabase
Google Workspace
Anthropic
Other companies using OpenAI
Check any company's vendors in seconds
See Zest's full stack with a source for every vendor, and ask the same question about any company from the API, Claude or your browser.
- Every company and vendor, with its public source
- 100 API calls a month, plus MCP and the Chrome extension
- Work email only. No card, no sales call