MastraOpen-source TypeScript framework for building AI agents, workflows, RAG, memory and MCP, with optional cloud studio and observability.

4.5 (4)

Reviewed by Daniel Nikulshyn·Updated June 2026

Open Source TypeScript AI Agents Workflows RAG Memory MCP Observability

Overview

Mastra is an open-source TypeScript framework for building AI-powered applications and agents. It provides a set of tools for developers to go from idea to implementation, including agents, workflows, memory, workspaces, and observability. Mastra integrates with various frontend and backend frameworks and can be deployed as a standalone server. It enables developers to build a range of capabilities, such as internal automation agents, customer-facing agents, and more. Mastra includes features like built-in observability, repeatable checks, and cacheable resumable streams. It is designed to support fast-scaling startups and large global organizations. Mastra's architecture is centered around agents, which can be defined with instructions, models, tools, and runtime behavior. Agents can interact with users, complete tasks, and hand off to product flows. The framework also includes a built-in event system for events, as well as a system for publishing and subscribing to events with Redis Streams and Google Cloud Pub/Sub. Mastra has a rich ecosystem of resources, including books, blogs, and guides. It has a large community of users and is widely adopted in various industries.

Key features

Agents
Workflows
Memory
Workspaces
Observability
Built-in event system

Pricing

Model: Freemium
Category: AI Agent Development Frameworks
Rating: 4.5 / 5 (4)

Use cases

Build Autonomous AI Agents in TypeScript

Use Mastra's framework to design and deploy AI agents with built-in memory and tool integrations directly in a TypeScript codebase.

Create RAG-Powered Knowledge Apps

Implement retrieval-augmented generation pipelines to ground LLM responses in your own documents and data sources.

Orchestrate Multi-Step AI Workflows

Compose complex, stateful AI workflows connecting multiple models, tools, and MCP servers for advanced automation tasks.

Monitor Agents with Cloud Studio

Leverage the optional cloud studio and observability features to debug, trace, and evaluate agent behavior in production.

Pros & Cons

Pros

Built-in observability
Repeatable checks
Cacheable resumable streams
Integrates with various frontend and backend frameworks
Supports fast-scaling startups and large global organizations

Cons

Lack of information on pricing and scalability
Complexity of the framework may be challenging for some users

Reviews

4.5

Average from 4 ratings.

Liam O’Connor

Dec 28, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on the dashboard, and it saves real time caught me off guard. still, I'd recommend giving it a real trial.

Tomáš Novák

Dec 13, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on the automation, and support is responsive caught me off guard. Pricing gets steep at scale is why this isn't a perfect score, still, I'd recommend giving it a real trial.

Beatriz Costa

Oct 13, 2025

Solid for our team

We rolled this out across the team last quarter and support is responsive. The dashboard fits neatly into how we already work, and the dashboard removed a step we used to do by hand. The mobile experience lags, which is the main caveat, but it has held up under daily use.

George Papadakis

Jul 27, 2025

Does the job

Pretty happy overall. The dashboard just works and it saves real time. The docs could be deeper can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.

Q&A

What can I build with Mastra and what core capabilities does it provide?

Mastra is an open-source TypeScript framework for building AI agents, workflows, RAG (retrieval-augmented generation), memory, and MCP (Model Context Protocol) integrations. It's suited for developers creating agentic applications in TypeScript/JavaScript environments.

What's the learning curve, and is Mastra a good fit for non-TypeScript developers?

Mastra is a TypeScript-first framework, so it's best suited to developers comfortable with TypeScript/JavaScript. Teams working primarily in Python or other languages may find it less convenient than language-native alternatives.

Is Mastra free, and what does the optional cloud offering include?

The core framework is open-source, so you can self-host it freely. Mastra also offers an optional cloud studio and observability layer for teams that want managed tooling and monitoring, though specific pricing isn't listed here.