About Antithesis
Antithesis is a Technology company based in Vienna (United States) founded in 2018 by Will Wilson. Antithesis has raised $182 million across 4 funding rounds from investors including Spark Capital, Amplify Partners and Tamarack Global. The company has 37 employees. Its chief executive, as recorded, is Will Wilson. Its website antithesis.com draws about 56 thousand monthly visits. Its focus areas include Enterprise Infrastructure, Software Testing Tools, Automated Testing Tools and AI based. Its legal entity is ANTITHESIS OPERATIONS LLC. Its competitors include Launchable, mabl and BlinqIO; 3 of its 3 listed competitors have raised funding.
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.
- Headquarters Vienna, United States
- Employees 37
- Founders Will Wilson
- SectorsTechnology
- Email••••••••
- Website antithesis.com
- Social LinkedIn X Instagram Threads
- Legal Name Antithesis Operations Llc
- Total Equity Funding$182M (USD)
in 4 rounds
- Latest Funding Round$105M (USD), Series A
Dec 2025
- InvestorsSpark Capital
& 8 more
- Employee Count37
Funding Insights of Antithesis
Antithesis has successfully raised a total of $182M across 4 strategic funding rounds. The most recent funding activity was a Series A round of $105 million completed in December 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $182M
- Total Rounds 4
- Last Round Series A — $105M
- Investors Count 9
All 4 funding rounds of Antithesis with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Dec 2025 | $105M | Series A | – | Jane Street | |
| Feb 2025 | $30M | Series A | – | Amplify Partners | |
| Feb 2024 | $47M | Seed | – | Amplify Partners, Tamarack Global | |
| Jan 2022 | Seed | – | – | – |
9 investors in total: 7 institutional and 2 angel.
Investors in Antithesis
Antithesis has secured backing from 9 investors, including venture fund, institutional, and angel investors. Prominent investors backing the company include Spark Capital, Amplify Partners and Tamarack Global.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Technical founders are supported through early-stage venture capital investments. | amplifypartners.com | Menlo Park, United States | ||
Private equity firm focused on space and digital assets sectors | tamarackglobal.com | Greenwich, United States | ||
Venture capital firm focused on early-stage biotech companies | firstinventures.com | Middletown, United States | ||
Venture capital is invested in consumer and enterprise software services. | teamworthy.com | |||
Spark Capital is engaged in venture capital investments. | sparkcapital.com | |||
Investment banking and advisory services are offered by Spark Capital. | 2001 | sparkcapital.in | Chennai, India | |
Quantitative trading firm with a focus on technology and collaborative problem solving | janestreet.com | |||
HL Howard Lerman | Founder of Yext, Roam, and Wonder, active angel investor in tech startups. | unknown_8a5ccbd56db741aeb | ||
PC Patrick Collison | Co-founder & CEO of Stripe, prominent tech investor, supports Indian startups | unknown_82e333106c564e3eb |
Investor details for Antithesis
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
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People of Antithesis
14 people are tracked at Antithesis (7 in leadership, 7 in team); the tracked headcount is 37.
| Name | Role | Group |
|---|---|---|
Will Wilson | Founder & CEO | Leadership |
Jeremy King | Vice President Of Services | Leadership |
Nick Lavezzo | Chief Operating Officer | Leadership |
David Searle | EMEA Field Operations Director | Leadership |
Megumi Suzuki | Director Of Operations | Leadership |
Kieran Raval | Director Of Strategic Initiatives | Leadership |
Kevin Boyle | Director Of Customer Success | Leadership |
Eric Dinh | Senior Consultant | Team |
Connor McKee | Manager, Professional Services | Team |
Richard Hart | Principal Software Engineer | Team |
Javi A. | Professional Services Engineer | Team |
Isaac Chua | Senior Consultant | Team |
Luis Fernandez | Senior Consultant | Team |
Chang Xiao | Manager Professional Services | Team |
Complete people profiles for Antithesis
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
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Timeline of Antithesis
3 dated milestones of Antithesis across 7 years, from founding to its latest funding, stage changes and deals.
- Founded Antithesis is founded.
- Funding First funding round.
- Funding Latest funding round, Series A, of $105.0M.
Competitors of Antithesis
Antithesis has 3 listed competitors in our database, 3 of them funded. They include Launchable, mabl and BlinqIO.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| launchableinc.com | 2019 | San Jose, United States | $9.5M | AI platform is used for continuous software testing and prioritization. | ||
| mabl.com | 2016 | Boston, United States | $76.1M | 51 | Automated functional testing is enabled through machine learning. | |
| blinq.io | 2023 | Wilmington, United States | $5M | An AI-powered platform for automated software testing is offered. |
Detailed competitors of Antithesis
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
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Verified entity values are shown only after access is granted.
Web traffic of Antithesis
The website of Antithesis (antithesis.com) receives about 56.1K visits a month.
- Monthly visits56.1K
▼ 31% vs previous month
Websites whose visitors overlap most with Antithesis. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| graphite.dev | 100% | 86.4K | #513,834 | View details | |
news.ycombinator.com | news.ycombinator.com | 81% | #4,699 | – | |
| linkedin.com | 74% | 1.9B | #18 | View details | |
| google.com | 73% | 85.8B | #1 | View details | |
| x.com | 72% | 4.5B | #5 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 17 similar websites and full traffic analytics for Antithesis
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 17 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
Verified entity values are shown only after access is granted.
Top companies in Programming & Software Development Tools
3 companies that operate in the same segment as Antithesis (Programming & Software Development Tools) in United States, ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Collaborative platform for design prototyping and feedback is provided. | 2012 | San Francisco, California, United States | USD 748.62 M | 2,877 | ||
AI-based platform for secure collaboration and content management is utilized. | 2005 | Redwood City, California, United States | USD 692.63 M | USD 1.18 B | 4,447 | |
Automated usability testing and feedback for mobile experiences is provided. | 2007 | San Francisco, California, United States | USD 148.5 M | USD 21.68 M | 557 |
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Related news about Antithesis
Complete news archive for Antithesis
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Frequently Asked Questions about Antithesis
Antithesis was founded in 2018 and raised its 1st funding round 4 years after it was founded.
Antithesis is headquartered in Vienna, United States.
Will Wilson is the CEO of Antithesis, as recorded in our data. They have also founded this company.
Antithesis is a funded company, having raised a total of $182M across 4 funding rounds to date.
Antithesis has 37 employees.
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.
Antithesis's top competitors include Launchable, mabl and BlinqIO.
Antithesis has 9 investors. Key investors include Spark Capital, Amplify Partners, Tamarack Global, First In Ventures, and Howard Lerman.
Antithesis operates through Antithesis Operations Llc.