Antithesis

Vienna, VA, United States

Antithesis provides a platform for autonomous verification and testing of software systems to help developers release bug-free systems quickly.

Cybersecurity AI & Machine Learning

Antithesis, based in Vienna, VA, United States, has 7 investors on file, among them Beaconsfield Capital, BlueWing Ventures and First In. Its latest round on record is Series A, 2 Dec 2025. Its site was last checked 13 Nov 2026: site answers.

antithesis.com

Funding

1 round on record

Latest roundSeries A2 Dec 2025

Since that round11 monthsno later round on record

Investors in its rounds1none with a VCinfo profile yet

Dec 2025Series ALed by Jane Street

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

Investors

7 investors on file

Investor	Evidence	Type
Beaconsfield Capital	Portfolio page	Investor
BlueWing Ventures	Portfolio page	Venture capital
First In	Portfolio page	Venture capital
Frontline	Portfolio page	Venture capital
Tamarack Global	Portfolio page	Venture capital
Teamworthy Ventures	Portfolio page	Venture capital
WorldQuant Ventures	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, 2 Dec 2025
Investors on file: 7
Employees: 51-200
Headquarters: Vienna, VA, United States
Open roles: 32
Site: Answers
Last checked: 13 Nov 2026

Company data by Fundup AI.

What Antithesis 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

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GET /v1/companies/antithesis.com/investors
GET /v1/companies/antithesis.com/news

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VCinfo API

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GET /v1/companies/antithesis.com
GET /v1/companies/antithesis.com/news

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