Antithesis
PrivateLast Round
Series A
Extension
Dec 3, 2025
Est. Valuation
$215M
Total Funding Raised
$182M
Momentum
Top 10%
of companies Caplight tracks
Company Overview
Antithesis is a software company that provides an autonomous testing platform designed to identify and reproduce bugs in complex software systems using deterministic simulation.
Sector
AI, Data & Cloud Infrastructure
Verticals
DevOps & Containers, Cloud Infrastructure, Database Management
Business Model
B2B
Customer Profile
Usage-Based SaaS, Subscription SaaS
AI Layer
Infrastructure
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Antithesis Comparables
Compare Antithesis with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Workers IO | 74% | |
| Gremlin | 72% | |
| Undo | 70% |
Antithesis Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series A Extension | Dec 3, 2025 | ||||
| Series A | Feb 13, 2025 | ||||
| Seed | Feb 13, 2024 |
Key People
Founding team and executive leadership
Antithesis Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Potluck Ventures | Seed |
| Jane Street | Series A Extension |
| Hyperion Capital Partners | Series A Extension |
| First In | Series A Extension, Seed |
| BlueWing Ventures | Series A Extension |
| Teamworthy Ventures | Series A Extension |
| Amplify Partners | Series A Extension, Series A, Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors grew 84% MoM, reaching 103.9K.
- Jul 16, 2026
Grew 26% QoQ, from 164 to 207 employees.
Antithesis Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
Request accessFrequently Asked Questions
Common questions about Antithesis's valuation, stock price, and market status.
Is Antithesis a public or private company?
Antithesis is a private company.
What is the current stock price of Antithesis?
Antithesis is a private company, so its shares have no public market price. Caplight tracks Antithesis's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Antithesis worth (valuation)?
Antithesis's valuation is estimated at $215.0M based on funding round data.
Can I buy Antithesis stock?
Antithesis shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Antithesis's last funding round?
Antithesis's most recent funding round was Series A Extension on December 3, 2025.
Who are the main investors in Antithesis?
Key investors in Antithesis include Jane Street, First In, Amplify Partners, V3 Ventures, Tamarack Global.
Will Antithesis IPO soon?
No public IPO plans have been announced for Antithesis.
How can I track Antithesis secondary market activity?
Caplight tracks bids, offers, and trades in Antithesis's shares on secondary markets.