Antithesis

Business/Productivity Software · Vienna, VA · Founded 2018 · Privately Held (backing)

Developer of quality assurance software intended to facilitate autonomous software testing. Antithesis is based in Vienna, VA and was founded in 2018. Its last reported valuation was $215 million in Feb 2024. It has raised $160 million across 2 recorded rounds; the latest was a $105 million Series A in Dec 2025.

Last reported valuation
$215.0M
Oct 2026
Priced at
—
Total raised
$160.0M
Last round
Later Stage VC (Series A)
Dec 2025
How much has Antithesis raised?
$160.0Macross 2 recorded rounds · Feb 2024 – Dec 2025

Most recently, Antithesis raised $105.0M in its Later Stage VC (Series A) (Dec 2025).

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Antithesis round by round

2 rounds
Dec 2025Later Stage VC (Series A)$105.0M▮
+ 1 more investors · free account
Feb 2024Seed Round$47.0M▮
+ 1 more investors · free account

How much has Antithesis raised?

Antithesis has raised $160 million across 2 recorded rounds since 2024. The largest was a $47 million seed round in Feb 2024; the most recent was a $105 million Series A in Dec 2025.

Antithesis investors

23 investors are on record for Antithesis, including US National Science Foundation, Spark Capital, Amplify Partners and Teamworthy Group. By type, the record holds 5 venture capital firms and 1 private equity firm. The Series A in Dec 2025 drew 10 investors.

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Frequently asked about Antithesis

How much has Antithesis raised?
Antithesis has raised $160.0M in total across 2 recorded funding rounds.
When was Antithesis's last funding round?
Antithesis's most recent recorded round was Later Stage VC (Series A) in Dec 2025, raising $105.0M.