# Google ADK (Python) vs LangGraph

## TL;DR

Both are graph runtimes for agents. Google ADK 2.0 adds a `Workflow` graph next to coordinator agents with subagents, and ships a CLI, dev web UI and eval runner; it is optimized for Gemini and Google Cloud deployment. LangGraph is a lower-level state graph with checkpoints, interrupts and time travel, deployed through LangSmith or self-hosted.

## Facts side by side

|  | [Google ADK (Python)](https://multiagentguide.top/tools/google-adk.md) | [LangGraph](https://multiagentguide.top/tools/langgraph.md) |
| --- | --- | --- |
| Type | Framework | Framework |
| Languages / SDKs | Python | Python |
| License | Apache-2.0 | MIT |
| Pricing model | [Open core](https://cloud.google.com/products/gemini-enterprise-agent-platform/pricing) | [Open core](https://www.langchain.com/pricing) |
| Orchestration pattern | Graph | Graph |
| GitHub stars | 21,686 (as of 2026-09-30) | 42,511 (as of 2026-09-30) |
| GitHub forks | 4,084 | 7,201 |
| Last push | 2026-09-30 | 2026-09-29 |
| Latest release | v2.10.0 | cli==0.4.32.dev0 |
| Repository | [google/adk-python](https://github.com/google/adk-python) | [langchain-ai/langgraph](https://github.com/langchain-ai/langgraph) |
| Website | [adk.dev](https://adk.dev/) | [www.langchain.com](https://www.langchain.com/langgraph) |
| Documentation | [adk.dev](https://adk.dev/) | [docs.langchain.com](https://docs.langchain.com/oss/python/langgraph/overview) |
| Last verified | 2026-09-30 | 2026-09-30 |
| MCP support | [Yes (checked 2026-09-30)](https://adk.dev/tools-custom/mcp-tools/agent-as-server/) | [Yes (checked 2026-09-30)](https://docs.langchain.com/langsmith/server-mcp) |
| A2A support | [Partial (checked 2026-09-30)](https://adk.dev/a2a/) | [Yes (checked 2026-09-30)](https://docs.langchain.com/langsmith/server-a2a) |
| AG-UI support | [Partial (checked 2026-09-30)](https://adk.dev/integrations/ag-ui/) | [Partial (checked 2026-09-30)](https://docs.langchain.com/oss/python/langchain/frontend/integrations/copilotkit) |
| Install verified | 2026-09-30 | 2026-09-30 |

## Choose Google ADK (Python) if

- You deploy on Google Cloud and want the documented path to the managed Agent Runtime or Cloud Run.
- You want built-in tooling in the package: `adk run`, `adk web` and `adk eval`.
- You need sibling SDKs in Java or Go with the same concepts (see the Google ADK Java and Go tool pages).

## Choose LangGraph if

- You need stable human-in-the-loop and A2A today: ADK labels tool confirmation and Python A2A as experimental.
- You want replay and fork from any checkpoint (time travel) and per-key state reducers.
- You prefer no tie to one cloud for managed hosting; LangGraph can run standalone or on LangSmith.

## Migration notes

Concept mapping is close. An ADK `Workflow` node corresponds to a LangGraph node; ADK edges with routing, fan-out and loops correspond to conditional edges and parallel branches; ADK `Session` state corresponds to graph state saved by a checkpointer, and ADK's cross-session memory service to a LangGraph store. Coordinator agents with subagents (chat, task, single-turn modes) have no built-in equivalent in LangGraph and become subgraphs or tool-wrapped agents. Human review moves between ADK tool confirmation (experimental; not supported with database or Vertex AI session services) and LangGraph `interrupt()`. Teams coming from ADK 1.x should read the ADK 2.0 notes first: agents became graph nodes and some legacy overrides are ignored.

## FAQ

### Is Google ADK tied to Gemini?

No. The README describes it as model-agnostic though optimized for Gemini.

### Which has better protocol coverage?

Both document MCP. ADK can consume MCP servers and publish an agent as one. A2A in ADK Python is labelled experimental (recorded as partial); LangGraph's A2A and MCP endpoints come from Agent Server. AG-UI is partial for both, via adapters maintained in the AG-UI repository.

### Are both free to use?

ADK is Apache-2.0 and LangGraph is MIT. Managed hosting is paid on both sides: Google Cloud's Agent Runtime beyond its no-cost tier, and LangSmith Deployment from the Plus plan.

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Data as of 2026-09-30. Not affiliated with listed projects. HTML version: https://multiagentguide.top/compare/google-adk-vs-langgraph