Goose

Goose is the open-source AI agent platform created by Block (formerly Square, Cash App, Tidal) and donated to the Agentic AI Foundation (AAIF) under the Linux Foundation. Built in Rust for performance, Goose runs on your local machine as a desktop app, CLI, or API — handling code, workflows, research, writing, automation, and data analysis use cases that would otherwise require multiple specialized tools. Pricing is fully free and open-source under Apache 2.0 license, with no paid tier. Like Aider, Goose follows a BYOK (Bring Your Own Key) model: users pay only for the LLM API usage they choose. Goose supports Claude, OpenAI, Google Gemini, local models via Ollama, and 30+ other LLMs through its Provider system. Typical Goose workflows cost $5-50/month in API fees depending on model choice and usage intensity, materially cheaper than subscription-based competitors at moderate use. Goose's differentiation versus Aider and Claude Code is the breadth of use cases and MCP-native architecture: rather than focusing solely on coding, Goose is a general-purpose AI agent with 70+ MCP extensions covering code (Git, GitHub, file operations), data (databases, APIs, web scraping), productivity (Slack, calendars, browsers), and creative work. The MCP-first design lets developers easily extend Goose with new tools, share extensions across the community, and embed Goose into other applications via the API. Goose is open-source on GitHub (38K+ stars, 400+ contributors) and operates under Apache 2.0 license. The project moved to the Agentic AI Foundation in 2025, joining the Linux Foundation ecosystem alongside other major open-source AI infrastructure. Block continues to support Goose development as an active maintainer, with broader community contribution from the AAIF ecosystem.