goose

Open-source on-machine AI agent from Block that can build, run and debug code via extensions/MCP.

Best for: Developers wanting a local, extensible general agent.
Open source: yes · Licence: Apache-2.0 (checked on GitHub 2026-10-16) · GitHub
Pricing: Not listed: we couldn't read pricing from an official page. Official site
Note: The official site has moved, so pricing wasn't checked. The repo is now aaif-goose/goose (Apache-2.0).
Other CLI agents: Aider, OpenAI Codex (CLI), Gemini CLI, Warp

See real apps built with AI: AI build tools · The Vibe Shipped 50

Pricing is copied from each tool's official page on the date shown and left out where we couldn't read it; prices change. Licences were checked on GitHub; 'unconfirmed' means not verified. No affiliate links.