Mastra AI

San Francisco, CA, United States

Mastra develops and provides a TypeScript AI framework for building agents and apps

AI & Machine Learning Enterprise Software

Mastra AI, based in San Francisco, CA, United States, has 17 investors on file, among them Base Case Capital, Broom Ventures and Conversion Capital. Its latest round on record is Series A, 10 Apr 2026, of 2 rounds. Its site was last checked 12 Nov 2026: site answers.

mastra.ai

Funding

2 rounds on record

Latest roundSeries A10 Apr 2026

Since that round7 monthsno later round on record

Time between rounds6 monthson average, over 2 rounds

Investors in its rounds53 with a VCinfo profile

Apr 2026Series ALed by Spark Capital, with Y Combinator

Oct 2025SeedLed by Y Combinator, with Gradient and 2 others

Round sizes and total raised are on Fundup AI, our sister product for funding data.

Investors

17 investors on file

Investor	Evidence	Type
Base Case Capital	Portfolio page	Micro VC
Broom Ventures	Portfolio page	Venture capital
Conversion Capital	Portfolio page	Venture capital
Eight Capital	Portfolio page	Venture capital
Gradient	Portfolio page	Venture capital
Lombardstreet Ventures	Portfolio page	Venture capital
Orange Collective	Portfolio page	Venture capital
Phosphor Capital	Portfolio page	Venture capital
Picks and Shovels	Portfolio page	Micro VC
Rice Capital	Portfolio page	Venture capital
Ritual Capital	Portfolio page	Venture capital
Scale Asia Ventures	Portfolio page	Venture capital
Script Capital	Portfolio page	Venture capital
Spark Capital	Portfolio page	Venture capital
Transpose Platform	Portfolio page	Venture capital
Y Combinator	Page + round	Accelerator
Zero Index	Portfolio page	Venture capital

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

At a glance

Latest round: Series A, 10 Apr 2026
Investors on file: 17
Founded: 2024
Employees: 1-10
Headquarters: San Francisco, CA, United States
Address: 2261 Market Street STE 5559, San Francisco, CA, 94114, United States
Open roles: 3
Site: Answers
Last checked: 12 Nov 2026

Company data by Fundup AI.

What Mastra AI runs on

Its vendors and tech stack, each with its source, are on StrataDB, our sister product.

See it on StrataDB

Backed by the same investors

Companies sharing two or more investors with Mastra AI.

Browser Use7 shared

Sygaldry6 shared

Domu5 shared

Exosat5 shared

AgentMail4 shared

Apollo Atomics4 shared

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VCinfo API

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