Mastra
An open-source TypeScript/JavaScript framework for building AI agents, from the creators of Gatsby.
About
Mastra is an open-source TypeScript framework for building AI-powered applications and autonomous agents. It provides a comprehensive developer toolkit for prototyping to production-ready deployment, integrating with frontend and backend JavaScript/TypeScript ecosystems like React, Next.js, and Node.js. Mastra enables developers to build, tune, and scale reliable AI agents that can reason, use tools, manage context and memory, and incorporate human-in-the-loop workflows.
Key facts
At-a-glance profile data
- Website
- mastra.ai
- Headquarters
- San Francisco, United States
- Founded
- 2024
- Employees
- 56
- Total funding
- $36M (Series A)
- Business model
- B2B
- Tags
- AI AgentAgentic AIDeveloper ToolsOpen SourceTypeScript
Mastra pricing
| Plan | Price | Includes |
|---|---|---|
| Starter | $0 / month | 100K observability events then $10 per 100K, 24 CPU hours then $0.35 per hour, 15 days data retention |
| Teams | $250 / month | 1M observability events then $8 per 100K, 250 CPU hours then $0.25 per hour, 6 months data retention |
| Enterprise | Custom | Custom volume and retention, RBAC, audit logs, SSO and IAM integration, Support and uptime SLAs with dedicated support engineer |
Apache 2.0 licensed self-hosted framework available for free to build and host agents anywhere. Enterprise licensed self-hosted available with flat annual fee, data stays in VPC and no per-trace or per-seat metering.
Plans as published by Mastra, checked September 2026. Current prices on mastra.ai
Funding rounds
| Date | Round | Amount | Lead investors |
|---|---|---|---|
| 9 Apr 2026 | Series A | $22M | Spark Capital |
| 8 Oct 2025 | Seed | $13M | Y Combinator |
| 1 Jan 2025 | Undisclosed round | $500K | Y Combinator |
Tech stack
Detected on mastra.ai, last scanned 29 Sept 2026. Run your own scan
- Frontend
- Next.js, Tailwind CSS
- CDN
- Vercel
- Email provider
- Google Workspace
Frequently asked
What is Mastra's Effective Domain Rating?
StartupHub's Effective Domain Rating for Mastra is 94 out of 100, measuring real cross-surface visibility in search engines and AI answers rather than claimed link authority. That is underrated against its Ahrefs Domain Rating of 76, meaning it surfaces in search and AI results more than its claimed authority alone would suggest.
Is Mastra trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Mastra is 61 out of 100, based on site security posture and privacy practices.
How much funding has Mastra raised?
Mastra has raised a total of $36M in funding. The most recent round on record is Series A.
How many employees does Mastra have?
Mastra has approximately 56 people on record.
GitHub Copilot
Mastra provides a framework for building AI agents, which can include coding assistants, competing with products like GitHub Copilot for developer mindshare and tooling budgets.
MongoDB Atlas
Mastra is used by platform teams at companies like MongoDB to automate DevOps and SRE work, indicating a potential overlap in providing tools for developers and operations.
Salesforce Einstein
Salesforce uses Mastra for its agentic IDE, suggesting that Mastra competes with Salesforce's internal AI development efforts and potentially its broader AI offerings.
Developer Tools
Replit is already using Mastra to build agentic workflows and allow its users to build agents and automation, demonstrating a clear need for Mastra's framework.
Creative Software
Adobe is building with Mastra, indicating a need for AI agent development within their creative software ecosystem.
FinTech
PayPal is going into production with Mastra, suggesting a use case for AI agents in financial services and automation.
Professional Services
Marsh McLennan built an enterprise search tool used by over 100,000 employees daily with Mastra, showcasing a need for large-scale internal AI automation.
Human Resources Technology
Indeed built a nationally advertised career counselor agent using Mastra, demonstrating a need for AI-powered tools in HR and recruitment.
FinTech
Brex is building agents within their apps to help users accomplish tasks faster and easier, and their agents helped drive their Capital One acquisition.
Confirmed customer relationships for Mastra. Speculative buyer-fit guesses are not shown.