Alternatives to Mastra

These tools sit near Mastra. Compare features and pricing before you switch.

MIT agent runtime. Rechecked: 144,198 GitHub stars. Pay model API only. Live Flash peak $0.44/$1.32 per 1M, not the old $0.14/$0.28 row.

400000000DR: 88AS: 78

LangChain's low-level agent orchestration runtime: durable graphs, streaming, human-in-the-loop, and persistence. About 39,835 GitHub stars.

5000000DR: 93AS: 95

Google's agent SDK in Python, Java, Go, and TypeScript. Docs now live at google.github.io/adk-docs. A2A is a separate protocol repo.

2000000DR: 95AS: 94

MIT agent framework. Rechecked: 144,367 GitHub stars. Hosted traces are LangSmith Developer $0 / Plus $39 per seat. Not LangServe-as-the-product.

5000DR: 140AS: 155