When was Antithesis founded?

Antithesis was founded in 2018 and raised its 1st funding round 4 years after it was founded.

Where is Antithesis located?

Antithesis is headquartered in Vienna, United States.

Who is the current CEO of Antithesis?

Aparna Saxena and Will Wilson s of Antithesis. Aparna Saxena has also founded 2 companies.

How many employees does Antithesis have?

As of Jun 30, 2026, the latest employee count at Antithesis is 202.

Is Antithesis a funded company?

Antithesis is a funded company, having raised a total of $182M across 4 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on 2022.

How much is Antithesis worth?

The latest valuation of Antithesis is $***** as of Feb 13, 2024.

When was the latest funding round of Antithesis?

Antithesis' latest funding was a $***** Series A round on Dec 03, 2025, with participation from 10 investors.

Where does Antithesis rank among its competitors?

Antithesis ranks 8th amongst 351 active competitors, of which 64 are funded. It stands 1st in terms of total funding among its competitors. The most recent competitor to raise funding was Antithesis, which secured $105M in Dec, 2025.

Who are the top competitors of Antithesis?

Antithesis' top competitors include TestMu AI, mabl and Opkey. Among them, Antithesis secured the most recent funding round in December, 2025.

Antithesis - 2026 Company Profile, Team, Funding & Competitors

Antithesis is a series A company based in Vienna (United States), founded in 2018 by Aparna Saxena and Will Wilson. It operates as a Provider of autonomous software testing platform for bug detection and reproduction. Antithesis has raised $182M in funding from investors like Amplify Partners, Jane Street and Tamarack Global, with a current valuation of $*****. The company has 351 active competitors, including 64 funded and 11 that have exited. Its top competitors include companies like TestMu AI, mabl and Opkey.

Company Details

Provider of autonomous software testing platform for bug detection and reproduction. This platform offers deterministic testing, enabling perfect reproducibility of found bugs, regardless of complexity. It explores software in novel ways, uncovering "unknown unknowns" not found through traditional testing methods. The platform facilitates easier debugging by providing a deterministic environment for analysis and reproduction of error paths. It also allows for continuous testing of new software versions, leading to quicker bug identification and resolution. This reduces time spent on manual testing and improves overall software quality and release cycles.

Website: antithesis.com
Social
Email ID: *****@antithesis.com

Key Metrics

Founded Year

2018

Location

Vienna, United States

Stage

Series A

Total Funding

$182M in 4 rounds

Latest Funding Round

Series A, Dec 03, 2025, $*****

Post Money Valuation

$***** as on Feb 13, 2024

Investors

Amplify Partners & 18 more

Ranked

8^th among 351 active competitors

Employee Count

202 as on Jun 30, 2026

Similar Companies

TestMu AI & 228 more

View Antithesis' full profile

Antithesis is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
ANTITHESIS OPERATIONS LLC CIN: 6773621 , United States, Active	Mar 22, 2023	-	37 (As on Dec 31, 2023)	-

Antithesis has raised a total funding of $182M over 4 rounds. Its first funding round was on 2022. Its latest funding round was a Series A round on Dec 03, 2025 for $*****. 10 investors participated in its latest round. Antithesis has 15 institutional investors and 4 angel investors.

Here is the list of recent funding rounds of Antithesis:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Dec 03, 2025	5638831	Series A	7484781	3795648	3858654	3915208
Feb 14, 2025	7389188	Series A	4434922	7761258	9683275	Spark Capital
Feb 13, 2024	9100214	Seed	2921960	8181517	Amplify Partners & 2 more	Howard Lerman & 1 more

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View details of Antithesis's funding rounds and investors

The founders of Antithesis are Aparna Saxena and Will Wilson. Aparna Saxena and Will Wilson are the CEOs of Antithesis.

Here are the details of Antithesis' key team members:

Aparna Saxena: Founder & CEO of Antithesis and founder of 1 other company.
Contact Info: 2 email addresses and 2 phone numbers
Will Wilson: Founder & CEO of Antithesis.
Contact Info: 1 email address

View details of Antithesis's Founder profiles and Board Members

Antithesis' employee count trend

Antithesis has 202 employees as of Jun 26. Here is Antithesis's employee count trend over the years:

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Top competitors of Antithesis include TestMu AI, mabl and Opkey. Here is the list of Top 10 competitors of Antithesis, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	TestMu AI 2018, San Francisco (United States), Series D	AI-native quality engineering and software testing platform	$108M	Blume Venture, Peak XV Partners & 16 others	64/100
2nd	mabl 2016, Boston (United States), Series C	AI-native test automation platform empowering software teams to deliver quality experiences	$76.1M	CRV, Google Ventures & 3 others	63/100
3rd	Opkey 2015, Dublin (United States), Series B	Provider of AI-powered test automation platform for enterprise resource planning	$58.2M	YourNest, PeakSpan Capital & 5 others	62/100
4th	Diffblue 2016, London (United Kingdom), Series A	Developer of AI-powered autonomous unit testing tools for Java applications	$46M	AlbionVC, IP Group & 17 others	62/100
5th	Evinced 2011, Los Altos (United States), Series C	Developer of AI-powered tools for website and mobile app accessibility	$112M	Insight Partners, M12 & 6 others	62/100
6th	TestSprite 2023, Seattle (United States), Seed	AI-powered autonomous software testing platform for validating logic and functionality in code written by artificial intelligence tools	$9.66M	Techstars, Hat-Trick Capital & 6 others	60/100
7th	Promptfoo 2023, San Francisco (United States), Acquired	Open-source tool to test AI applications	$23.6M	Andreessen Horowitz, Insight Partners & 3 others	54/100
8th	Antithesis 2018, Vienna (United States), Series A	Provider of autonomous software testing platform for bug detection and reproduction	$182M	Spark Capital, WorldQuant Ventures & 17 others	58/100
9th	Functionize 2014, San Francisco (United States), Series B	Cloud based platform offering software for automated testing	$67M	Mumford Investments, LHH Investments & 4 others	58/100
10th	Adaptive ML 2023, New York City (United States), Acquired	Cloud-based platform for building and testing large language models	$20M	Index Ventures, Iconiq Capital & 5 others	58/100