An open-source company building best-in-class tooling for humans and agents
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Zod | TypeScript-first schema validation with static type inference. owned by @colinhacks |
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Hey API | Turn API specifications into production-ready SDKs, validators, mocks, and more. owned by @mrlubos |
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Nub | The all-in-one toolkit for Node.js. |  |
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Playwriter | Control your real Chrome with Playwright from an agent, a CLI, or an MCP server. owned by @remorses |
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GPUIX | Build native apps with React or Solid on Zed's GPUI, from Node.js or Bun. owned by @remorses |
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Reylo | Import .sql files into TypeScript, typed from your live database. |  |
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Pullfrog | The batteries-included agent workflow platform for GitHub. commercial |
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Holocron | A drop-in replacement for Mintlify, as a Vite plugin. owned by @remorses |
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Colin McDonnell @colinhacks |
Works on Zod, Nub, Reylo, and Pullfrog. | colinhacks.com · X · Bluesky |
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Lubos @mrlubos |
Works on Hey API. | lubo.sh · X · Bluesky |
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Tommy D. Rossi @remorses |
Works on Playwriter, GPUIX, and Holocron. | X · Bluesky |
Variadic employs people to work full time on open source while allowing them to maintain total editorial control over their own projects.
