“Documentation that lies is worse than no documentation.”

We’ve all been there — code changes, docs don’t, and the next dev wastes hours debugging something that was never actually broken.

We’re building Synk to fix this: an AI tool that watches your repo for code changes and automatically suggests documentation updates. No more stale docs.

• Open-source & self-hostable
• Waitlist is now open — early signups get free credits at launch

Sign up: https://use-synk.com

Also: We need your feedback on Synk. If you feel like trying out the app and giving us feedback, please reach out via email or Discord.

Our current tech stack looks something like this:

• Frontend: Next.js 15 with React 19
• UI: Tailwind CSS v4, shadcn-based components and Base UI Primitives
• Auth: Better Auth
• API: Hono for HTTP endpoints and orchestration
• Database: PostgreSQL with Prisma
• Background processing: separate worker for AI runs and analysis jobs
• Queues: BullMQ with Valkey/Redis-compatible backend
• Runtime/Monorepo: Bun + Turborepo

The technical workflow roughly consists of the following:

Code changes from GitHub are received by the API and placed in the queue as jobs. A worker processes these jobs, analyses diffs and affected documentation files, and generates targeted update suggestions from them. These suggestions are then sent back to the app, where they can be reviewed and approved within the context of the project.

One more important point: unlike competitors such as GitBook or Mintlify, Synk does not tie you to a specific documentation framework. It adapts to the framework of your choice (Nextra, Fumadocs, Vitepres, etc.), so you retain full control over your documentation.

We’re also hiring founding engineers — if you want to build developer tooling that actually matters, reach out.