Mastra

Mastra is the TypeScript-native agent framework that the JavaScript ecosystem has been waiting for. It brings agent capabilities to the Node.js and TypeScript world with clean APIs.

What it is

Mastra is a TypeScript framework for building AI agents. It includes model routing (with fallback and ensemble strategies), built-in memory systems, tool creation, workflow definitions, and observability.

Get started

npm install mastra

import { Agent } from "mastra";
import { ollama } from "@mastra/ollama";
 
const agent = new Agent({
  model: ollama("qwen3:30b"),
  instructions: "You are a helpful assistant"
});
await agent.send("Hello!");

When to use something else

• Python ecosystem: LangChain or CrewAI
• Multi-modal: Agno
• Maximum ecosystem: LangChain