Google Agent Development Kit
Google's official ADK for building multi-agent systems on Gemini and Vertex AI.
About
The Agent Development Kit (google/adk-python, Apache-2.0, ~21.8k stars) is Google's official framework for multi-agent systems: hierarchical agent composition, built-in tools, sessions/state, and deployment to Vertex AI Agent Engine. Docs at google.github.io/adk-docs.
The natural choice for Gemini/Vertex AI stacks, with first-class Google Cloud integration. Very actively maintained (62 releases/12mo).
What it can do
- Hierarchical multi-agent composition
- Built-in tools and custom tool support
- Sessions, state, and memory
- Vertex AI Agent Engine deployment
- Streaming and bidirectional communication
Setup
pip install google-adk.- Set up Google Cloud credentials / Gemini API key.
- Define agents and tools per the ADK docs.
- Test locally with the ADK web UI; deploy to Vertex AI Agent Engine.
Prerequisites
Python 3.9+; Google Cloud project or Gemini API key.
Use cases
Works with
Trust score — 9/10
Scored 9/10 (verified tier). Official Google framework, ~21.8k stars, Apache-2.0, very actively maintained, docs verified live. The default for Gemini/Vertex stacks. Docked only for GCP-centrism outside Google Cloud. Near the top of the catalog.
★ 21,790 GitHub stars
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 8.1/10
- Maintenance · recency, releases, issue load
- 9.2/10
- Openness · license + docs
- 9.7/10
- Manual review · sanity read + red-flag check
- 9.0/10
- · 21,790 GitHub stars (log-scaled vs catalog peers)
- · last push 1d ago; 62 releases/12mo; 419 open issues
- · manual review: official Google Agent Development Kit; multi-agent orchestration; very active; license: Apache-2.0
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.