Use Which Tool

Use Which Tool is a curated directory of 49 AI tools for vibe coders and indie builders, across coding agents, app builders, design, research, testing, deployment and AI assistants. Every pricing claim links to its official source and carries the date it was checked. The site is refreshed daily: each tool's official pricing page is fetched, and any change is confirmed with a second fetch before it goes live. There are no scores, star ratings or paid rankings. The data is open: JSON, an OpenAPI spec, llms.txt, and a read-only MCP server that needs no sign-in.