Mastra
The Javascript framework for building AI agents, from the Gatsby devs
San Francisco, United States · Founded 2024 · $35.0M raised
- Headquarters
- San Francisco, California
- Employees
- 1–10
- Founded
- 2024
- Business Model
- B2B
- Website
- mastra.ai
- Total Funding
- $35.0M
- Last Round
- $22.0M Series AMay 2026
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
About
Mastra is the easiest way to build a production AI application, built by the team that brought you Gatsby. We provide a complete set of AI primitives: workflows for complex operations, agents for autonomous decisions, RAG for knowledge integration, and evals for quality & accuracy. Mastra is open-source, modular, and built in Typescript for product developers. You can deploy Mastra on any cloud, and it gives you a straightforward syntax to solve the hardest problems building with AI: human-in-the-loop workflows, agent memory and tool selection, and output quality.
Summary
Mastra is an Artificial Intelligence company based in San Francisco, United States, founded in 2024. It has raised $35.0M in total across 2 rounds, most recently a $22.0M Series A round in May 2026.
Tech & App Stack
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Funding History
May 2026
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Funding: Seed through Series A. Amounts, valuations, and investors where available.
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