Ax vs Google Agent Development Kit (ADK)

Ax and Google Agent Development Kit (ADK) are both agent frameworks for Python. Ax is published by Ax and Google Agent Development Kit (ADK) by Google. On GitHub, Google Agent Development Kit (ADK) has 21,990 stars and Ax has 2,969. Both were last active in Oct 2026. The table lines up where they differ (publisher, GitHub stars, weekly downloads and languages) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. Ax describes itself as: DSPy-style toolkit for typed LLM signatures, agents and flows, TypeScript-first with Python, Java, C++, Go and Rust libraries. Google Agent Development Kit (ADK): Open-source toolkit for building, evaluating and deploying agents in Python, TypeScript, Go, Java and Kotlin, tuned for Gemini but model-agnostic. Licenses: Ax Apache-2.0, Google Agent Development Kit (ADK) Apache-2.0.