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Antithesis

As of 14 Oct 2026, Antithesis has raised $105M across 1 verified round on record; latest: $105 million Series A led by Jane Street, announced 3 Dec 2025.

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Antithesis is an autonomous software testing platform that finds the bugs others miss.

antithesis.comLinkedInNorthern Virginia

LATEST ROUND

Series A

$105M · 2025-12-03

RAISED ON RECORD · USD

$105M

across 1 verified round

INVESTORS

1 lead

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from 1 publisher

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Every round on record, with the sources behind each and the investors on them.

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Series A

$105M · 2025-12-03

[ HISTORY ]

led by Jane Street

Round	Amount	Announced	Lead	Buzz
Series A [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it.	$105M	2025-12-03	Jane Street	No recent discussion
1 source [ VERIFIED ] read against 1 source HQ added Northern Virginia · prnewswire.com The source says “alongside other new and returning investors” but does not identify them, so they are not listed.

Antithesis

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Antithesis

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Series A$105M2025-12-031 source

Investors

Series A$105M2025-12-0310 investors