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Mastra (YC W25) — The javascript framework for building AI agents, from the gatsby devs

Mastra appears in Y Combinator's company directory in the Winter 2025 batch, listed 2025-01-17. The Javascript framework for building AI agents, from the Gatsby devs.

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Mastra: Accepted into Y Combinator Winter 2025

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Mastra

New accelerator entry · 2025-01-17 · the record

Winter 2025
batch
30
people
Early
stage
United States of America
region
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In their words

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.

What the record says

BatchWinter 2025
Announced2025-01-17
StageEarly
StatusActive
Team size30
IndustryB2B
Sub-industryB2B -> Engineering, Product and Design
SectorsArtificial Intelligence, Developer Tools, Open Source, AI
RegionsUnited States of America, America / Canada, Remote, Fully Remote
BasedSan Francisco, CA, USA; Remote
HiringNo
Sitehttps://mastra.ai

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If you're behind Mastra: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry.

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Permanent URL: https://mentionfox.com/funding/yc-mastra
Last updated 2026-09-26
Primary record: Y Combinator directory entry
Mastra (YC W25) — The javascript framework for building AI agents, from the gatsby devs. MentionFox, 2026-09-26. https://mentionfox.com/funding/yc-mastra