CrewAI
Multi-agent automation framework & studio to build and run AI crews
Mastra
TypeScript framework for building scalable AI agents and workflows
Mastra provides a modern TypeScript stack to prototype, deploy, and scale AI-powered applications, offering model routing, autonomous agents, graph workflows, human-in-the-loop, and built-in observability.
Overview
Highlights
Unified model routing across 40+ LLM providers
Autonomous agents with tool use and iterative reasoning
Graph‑based workflow engine with intuitive control flow
Built‑in evaluation, observability, and human‑in‑the‑loop support
Pros
- TypeScript‑first design aligns with modern web stacks
- Single interface simplifies multi‑model integration
- Seamless integration with React, Next.js, and Node.js
- Comprehensive production tooling (evals, observability)
Considerations
- Requires familiarity with TypeScript/JavaScript
- Abstraction layer may add overhead for simple bots
- Ecosystem still maturing compared to older AI libraries
- Limited to Node/JavaScript runtime environments
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Fit guide
Great for
- Teams building AI assistants that need multi‑model support
- Developers embedding agents into React or Next.js applications
- Enterprises requiring observable, iteratable AI pipelines
- Projects that benefit from human‑in‑the‑loop workflows
Not ideal when
- Projects preferring Python‑centric AI ecosystems
- Simple static chatbots without complex orchestration
- Environments without a Node/TypeScript runtime
- Teams that need out‑of‑the‑box UI components beyond integrations
How teams use it
Customer support chatbot with tool‑calling
Handles queries, fetches order data via API, and escalates to a human when needed.
Content generation pipeline
Orchestrates LLMs for outline, draft, edit, and final publishing with a human review step.
Internal knowledge‑base assistant
Retrieves documents, maintains conversation memory, and provides accurate answers to employee questions.
Multi‑modal AI workflow
Combines text and image models to analyze visuals and generate structured reports.
Tech snapshot
TypeScript99%
JavaScript1%
CSS1%
HTML1%
Frequently asked questions
What programming languages does Mastra support?
Mastra is built for TypeScript and JavaScript and runs on Node.js.
How many LLM providers can I connect to?
Mastra offers a unified interface to more than 40 providers, including OpenAI, Anthropic, Gemini, and others.
Can I pause an agent for user input?
Yes, the human‑in‑the‑loop feature lets you suspend execution and resume later with stored state.
Does Mastra integrate with existing React apps?
It provides dedicated integrations for React, Next.js, and can also be used as a standalone endpoint.
How can I monitor the performance of my agents?
Mastra includes built‑in evaluation metrics and observability tools to track usage, latency, and quality.
Project at a glance
Active- Stars
- 19,832
- Watchers
- 19,832
- Forks
- 1,435
Repo age1 year old
Last commit3 hours ago
Primary languageTypeScript
Last synced 3 hours ago