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LangChain vs Mastra
Mastra is a TypeScript-only framework; LangChain supports multiple languages and broader deployment features.
Which to pick
Pick LangChain if you want…
- End-to-end agent engineering platform
- General LLM app development
Pick Mastra if you want…
- Typed AI agents with built-in observability
- TypeScript AI agents
LangChain is a broader LLM app framework for Python and JavaScript, while Mastra is TypeScript-first with built-in workflows and observability.
Side by side
- What it is
- LangChain:LangChain is an open platform for building, testing, deploying, monitoring, and governing LLM agents.
- Mastra:Mastra is an open-source TypeScript framework for building AI agents with memory, tools, workflows and observability.
- Best for
- LangChain:End-to-end agent engineering platform
- Mastra:Typed AI agents with built-in observability
- Who it’s for
- LangChain:Developers and teams building AI agents and LLM-powered applications.
- Mastra:TypeScript developers building AI-powered applications and agents.
- Pricing
- LangChain:Freemium
- Mastra:Freemium
- Plans
- LangChain:Developer $0 per seat per month · Plus $39 per seat per month
- Mastra:Starter $0 per month · Teams $250 per month
- Open source
- LangChain:Yes, 147,359 GitHub stars
- Mastra:Yes, 28,481 GitHub stars
- Works with
- LangChain:—
- Mastra:React, Next.js, Node, LibSQL, Postgres, Vite
LangChain features
- Build agents fast. Start with proven patterns, customize harness, context, memory and model choice.
- Trace-based testing. Debug runs with step-by-step tracing and query complex traces instantly.
- Managed deployments. Deploy long-running agents with serverless or dedicated sandboxes and 30+ endpoints.
- Production monitoring. Online evals, dashboards and alerts track quality, cost, latency and errors.
- Feedback loop engine. Automatically detect issues, diagnose root causes and feed fixes back into evals.
- Governance controls. Enforce cost limits, data redaction and human approval via LLM Gateway.
Mastra features
- 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.
LangChain vs Mastra FAQ
Is LangChain or Mastra free?+
LangChain has a free plan (Developer); paid plans start at $39/month per user (Plus). Mastra has a free plan (Starter); paid plans start at $250/month (Teams).
Which is cheaper, LangChain or Mastra?+
LangChain starts at $39/month per user (Plus) and Mastra starts at $250/month (Teams); the plans are billed differently, so compare what's included.
Is LangChain or Mastra open source?+
Yes, both are open source: LangChain (langchain-ai/langchain on GitHub, MIT license) and Mastra (mastra-ai/mastra on GitHub).
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.