Google Agent Development Kit (ADK) vs LangChain
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Google Agent Development Kit (ADK) if you want open-source framework for building and orchestrating multi-agent systems (Supervised agent, free); choose LangChain if you want open-source framework and platform for building and deploying llm agents (Supervised agent, freemium).
| Google Agent Development Kit (ADK) | LangChain | |
|---|---|---|
| What it is | Open-source framework for building and orchestrating multi-agent systems | Open-source framework and platform for building and deploying LLM agents |
| Type | framework | framework |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | free · Free (open source; pay model + cloud usage) | freemium · Framework free (MIT); LangSmith free Developer tier |
| Best for | developers, enterprise | developers, enterprise, mid-market |
| Deployment | self-hosted, api | self-hosted, api, saas |
| Modalities | text, code, api | text, code, api |
| Models | gemini, model-agnostic | model-agnostic, gpt, claude, gemini, llama, open-source |
| Protocols | a2a, mcp, function-calling, rest-api | function-calling, mcp, rest-api |
| Integrations | Vertex AI, Cloud Run, Gemini, LiteLLM, MCP servers | OpenAI, Anthropic, Google, AWS Bedrock, Pinecone, Hugging Face |
| Capabilities | 3 documented | 4 documented |
Google Agent Development Kit (ADK)
- +Backed by Google with first-class deployment to Vertex AI and Cloud Run
- +Built around the open A2A protocol for cross-framework agent interoperability
- +Model-agnostic via LiteLLM despite Gemini-first defaults
- -A framework, not a product: you build, host, and secure agents yourself
- -Strongest when paired with Google Cloud, which can imply lock-in
LangChain
- +Largest open-source LLM/agent framework community with very broad integration coverage
- +Model-agnostic design future-proofs apps against LLM churn
- +LangGraph adds production-grade primitives (durability, checkpointing, human-in-the-loop) that bare API calls lack
- -Frequently criticized for heavy abstractions and churn between API versions; debugging deep chains can be painful
- -Most production value (observability, deploy) lives in the paid LangSmith platform
Which should you choose?
Google Agent Development Kit (ADK) is open-source framework for building and orchestrating multi-agent systems, best for developers, enterprise. LangChain is open-source framework and platform for building and deploying llm agents, best for developers, enterprise, mid-market. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced Google Agent Development Kit (ADK) and LangChain profiles. Open either profile to review its evidence and last-reviewed date.