LangChain Rust vs Mastra
Side-by-side comparison of two AI agent tools
Short answer
- LangChain Rust has had no commit in 17 months; Mastra is actively maintained (4,109 commits in the last 90 days).
- Mastra is growing faster: +968 GitHub stars in the last 30 days vs +13 for LangChain Rust.
- Pick LangChain Rust for: langChain for Rust, the easiest way to write LLM-based programs in Rust. Pick Mastra for: from the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents.
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LangChain Rustopen-source
🦜️🔗LangChain for Rust, the easiest way to write LLM-based programs in Rust
Mastrafree
From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.
Metrics
| LangChain Rust | Mastra | |
|---|---|---|
| Stars | 1.3k | 28.5k |
| Star velocity /mo | 13.105263157894738 | 968.3684210526316 |
| Commits (90d) | 0 | 4.1k |
| Releases (6m) | 0 | 10 |
| Downloads (30d, npm + PyPI) | — | 3.1M |
| Overall score | 0.20114322752134345 | 0.8983723604743185 |
Pros
- +Supports multiple LLM providers (OpenAI, Claude, Ollama) with consistent API
- +Comprehensive vector store integrations including Postgres, Qdrant, and SurrealDB
- +Native Rust performance and memory safety for production AI applications
- +统一的多提供商接口支持 40+ AI 模型提供商，避免供应商锁定
- +完整的 AI 应用工具链包括代理、工作流、人机交互和上下文管理
- +TypeScript 原生支持和现代技术栈集成，开发体验优秀
Cons
- -Smaller ecosystem and community compared to Python LangChain
- -Requires Rust knowledge which has a steeper learning curve
- -Documentation and examples are more limited than the main LangChain project
- -作为相对较新的框架，生态系统和社区资源可能有限
- -多功能集成可能带来学习曲线，需要时间掌握各个组件
- -文档和最佳实践可能还在完善中，缺少大规模生产案例
Use Cases
- •Building RAG systems with vector databases for semantic document retrieval
- •Creating conversational AI applications with persistent memory and context
- •Developing high-performance AI pipelines that require Rust's safety and speed
- •构建需要多个 AI 模型协作的复杂智能代理系统
- •开发需要人机交互审批流程的自动化工作流应用
- •快速原型验证 AI 产品概念并扩展到生产环境
FAQ
- Which is more popular, LangChain Rust or Mastra?
- Mastra has more GitHub stars (28,525 vs 1,348).
- Which is more actively developed, LangChain Rust or Mastra?
- Mastra had more commits in the last 90 days (4,109 vs 0).
- Should I use LangChain Rust or Mastra?
- Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.