Compare
LangGraph vs LangWatch
LangGraph offers stateful agent building; LangWatch adds end-to-end testing, evaluation and tracing.
LangGraphFramework for building stateful, controllable AI agents
LangWatchThe harder your agents get, the more you need LangWatch.Which to pick
Pick LangGraph if you want…
- Customizable stateful agent orchestration
- Stateful agent framework
- A free, open-source tool
Pick LangWatch if you want…
- Simulation-based testing for complex agents
Side by side
- What it is
- LangGraph:LangGraph is an open-source framework for building stateful, controllable AI agents with memory, streaming, and human-in-the-loop support.
- LangWatch:LangWatch is an open-core platform for simulating, testing and monitoring multi-turn AI agents end-to-end.
- Best for
- LangGraph:Customizable stateful agent orchestration
- LangWatch:Simulation-based testing for complex agents
- Who it’s for
- LangGraph:Developers building complex, production-grade AI agents
- LangWatch:AI engineers, product managers and teams building production AI agents.
- Pricing
- LangGraph:Open source
- LangWatch:Freemium
- Plans
- LangGraph:—
- LangWatch:Developer $0 · Growth $34 per core-seat / month
- Open source
- LangGraph:Yes, 42,570 GitHub stars
- LangWatch:Yes, 4,939 GitHub stars
- Works with
- LangGraph:—
- LangWatch:LangGraph, CrewAI, Pydantic AI, OpenTelemetry, LiteLLM proxy
LangGraph features
- Human-in-the-loop controls. Add moderation and approval steps to keep agents on track.
- Expressive workflow primitives. Create single, multi-agent, or hierarchical flows with low-level building blocks.
- Persistent memory stores. Maintain conversation history and context across sessions.
- Token-by-token streaming. Stream agent reasoning and actions in real time for better UX.
- Model-agnostic runtime. Run agents with any LLM provider using high-level or fine-grained APIs.
- Open-source MIT license. Free to use and modify without licensing fees.
LangWatch features
- Scenario-driven simulations. Write plain-language scenarios that generate multi-turn conversations for agents.
- Red-team adversarial testing. Run adversarial simulations to surface jailbreaks, policy breaks and unsafe tool calls.
- Judge agent evaluation. LLM or custom judges score whole conversations with reasoning and pass/fail verdicts.
- Observability & tracing. Full OpenTelemetry-compatible traces of every token, tool call, cost and latency.
- CI/CD integration. Run simulations and evaluations locally or in pipelines on pull requests.
- Voice agent testing. End-to-end voice simulations with latency metrics and noise/interruption injection.
LangGraph vs LangWatch FAQ
Is LangGraph or LangWatch free?+
LangGraph is free and open source. LangWatch has a free plan (Developer) and paid plans.
Is LangGraph or LangWatch open source?+
Yes, both are open source: LangGraph (langchain-ai/langgraph on GitHub, MIT license) and LangWatch (langwatch/langwatch on GitHub, Apache-2.0 license).
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.