Mastra

The Javascript framework for building AI agents, from the Gatsby devs

San Francisco

30 employees

Series A · $35M

About Mastra

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.

Company details

Team Size30

LocationSan Francisco

IndustryAI

Funding

Total raised

$35M

Last stage

Series A

Investors

Y Combinator

Spark Capital

Gradient Ventures

SSVAngel

Runa Capital

Founders

Sam Bhagwat

Founder/CEO of Mastra. Spent last ~8yrs as cofounder of Gatsby.js, an open-source React website framework, scaled to $5M ARR, sold to Netlify. Eng <20 at Zenefits (W13) and Plangrid (W12). Spent two years knocking doors. Stanford '11.

Shane Thomas

Founder/CPO of Mastra. Prev: built Audiofeed (AI podcasting). Staff eng / head of product @ Gatsby. 15+ years in open source. State wrestling champion.

Abhi Aiyer

Founder/CTO of Mastra. Principal eng & lead of >100 person eng org at Netlify. Built Gatsby Cloud infra that ran 10s of thousands of build nodes, served billions of files, and 100s of TB of monthly bandwidth.

What happens next.

No applications, no recruiter spam. Just the intro.

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.