LangGraph vs Mastra

Mastra is a TypeScript framework for AI agents; LangGraph is a low-level orchestration library for Python and JavaScript.

Which to pick

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.; Mastra:Mastra is an open-source TypeScript framework for building AI agents with memory, tools, workflows and observability.
Best for: LangGraph:Customizable stateful agent orchestration; Mastra:Typed AI agents with built-in observability
Who it’s for: LangGraph:Developers building complex, production-grade AI agents; Mastra:TypeScript developers building AI-powered applications and agents.
Pricing: LangGraph:Open source; Mastra:Freemium
Plans: LangGraph:—; Mastra:Starter $0 per month · Teams $250 per month
Open source: LangGraph:Yes, 42,570 GitHub stars; Mastra:Yes, 28,481 GitHub stars
Works with: LangGraph:—; Mastra:React, Next.js, Node, LibSQL, Postgres, Vite

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.

Typed Agents. Define agents with instructions, models, tools and runtime behavior in TypeScript.
Workflows. Compose multi-step, retryable, branchable workflows with typed control flow.
Harness. Coordinate multi-mode agents with shared state, threads and storage.
Memory. Durable observational memory with semantic recall and thread-aware storage.
Observability. Logs, metrics, traces, datasets and signals for full runtime insight.
Server & Studio. Run agents locally or in Mastra Cloud and manage them via a web studio.

Is LangGraph or Mastra free?+

LangGraph is free and open source. Mastra has a free plan (Starter); paid plans start at $250/month (Teams).

Which is cheaper, LangGraph or Mastra?+

LangGraph is free, so it costs less. Mastra starts at $250/month (Teams).

Is LangGraph or Mastra open source?+

Yes, both are open source: LangGraph (langchain-ai/langgraph on GitHub, MIT license) and Mastra (mastra-ai/mastra on GitHub).

LangGraph

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Mastra

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Based on each tool's website and DevHunt data. Details may change; check the official sites.