LangChain vs Mastra: Which is Better in 2026?
Choosing between LangChain and Mastra? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.
Quick verdict
Both LangChain and Mastra are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
LangChain vs Mastra — Side by Side
| LangChain | Mastra | |
|---|---|---|
| Category | Agent Framework | Agent Framework |
| Pricing | Free · paid from $39/mo | Free |
| Starting price | Free tier available | Free tier available |
| Free tier | ||
| Rating | 4.5 | 4.6 |
| Best for | Agent Framework — ai, llm | Agent Framework — ai, llm |
Pros & Cons
- Largest ecosystem & integrations
- Free open-source core
- Python and TypeScript
- LangSmith for observability
- Abstractions can feel heavy
- Fast-moving API surface
- Best-in-class for TypeScript teams
- Batteries-included (agents, workflows, memory, evals)
- From the experienced Gatsby team
- Strong observability & MCP support
- Younger than Python frameworks
- TypeScript-only ecosystem
Key Features Compared
LangChain
- Free open-source framework
- Python & JS/TS
- Huge integration ecosystem
- Chains, tools, memory, RAG
Mastra
- TypeScript-native agents & workflows
- Memory & semantic recall
- Evals & observability
- MCP tool sharing
- 3,300+ models via providers
Choose LangChain if…
- You want a free tier to validate before paying.
- Largest ecosystem & integrations
- Free open-source core
- Python and TypeScript
Choose Mastra if…
- You want a free tier to validate before paying.
- Best-in-class for TypeScript teams
- Batteries-included (agents, workflows, memory, evals)
- From the experienced Gatsby team
Frequently Asked Questions
Is LangChain better than Mastra?⌄
Both LangChain and Mastra are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
What is the difference between LangChain and Mastra?⌄
LangChain — The most popular open-source framework for building LLM apps and agents, with LangSmith for observability. Mastra — Open-source TypeScript agent framework from the Gatsby team — agents, workflows, memory, and observability in one modern stack. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.
LangChain vs Mastra: which is cheaper?⌄
LangChain pricing: Free · paid from $39/mo. Mastra pricing: Free. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, LangChain or Mastra?⌄
In our catalog, LangChain rates 4.5 out of 5 and Mastra rates 4.6 out of 5, so Mastra has a slight edge on reviews.
See more options in our guide to the best agent framework tools for startups.
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