Which is more popular, LangChain Dart or Mastra?

Mastra has more GitHub stars (28,498 vs 689).

Which is more actively developed, LangChain Dart or Mastra?

Mastra had more commits in the last 90 days (4,044 vs 13).

Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.

Side-by-side comparison of two AI agent tools

Mastra is growing faster: +969 GitHub stars in the last 30 days vs +3 for LangChain Dart.
Pick LangChain Dart for: build LLM-powered Dart/Flutter applications. Pick Mastra for: from the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents.

From GitHub data refreshed daily.

Build LLM-powered Dart/Flutter applications.

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

+Unified API for multiple LLM providers with easy provider switching capabilities
+Comprehensive framework covering the full LLM application stack from model interaction to agent workflows
+LangChain Expression Language (LCEL) for flexible component composition and chaining

-Unofficial port may have delayed updates compared to the original Python version
-Smaller ecosystem and community compared to Python/JavaScript LLM libraries
-Limited documentation and examples specific to Dart/Flutter use cases

•Building chatbots and conversational AI applications for mobile platforms
•Implementing Q&A systems with Retrieval-Augmented Generation (RAG) in Flutter apps
•Creating intelligent agents that can use tools for web search, calculations, and database operations

Which is more popular, LangChain Dart or Mastra?: Mastra has more GitHub stars (28,498 vs 689).
Which is more actively developed, LangChain Dart or Mastra?: Mastra had more commits in the last 90 days (4,044 vs 13).
Should I use LangChain Dart or Mastra?: Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.