Google Agent Development Kit (ADK) vs Pydantic AI

Google Agent Development Kit (ADK) and Pydantic AI are both agent frameworks. Google Agent Development Kit (ADK) is published by Google and Pydantic AI by Pydantic. On GitHub, Google Agent Development Kit (ADK) has 21,990 stars and Pydantic AI has 20,838. Both were last active in Oct 2026. The table lines up where they differ (publisher, license, weekly downloads and languages) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. Google Agent Development Kit (ADK) describes itself as: Open-source toolkit for building, evaluating and deploying agents in Python, TypeScript, Go, Java and Kotlin, tuned for Gemini but model-agnostic. Pydantic AI: Typed Python SDK for building agents with swappable model providers, plus optional capabilities for memory, sub-agents, planning and durable execution. Licenses: Google Agent Development Kit (ADK) Apache-2.0, Pydantic AI MIT.