Reactor
PrivateLast Round
Series A
Oct 5, 2026
Total Funding Raised
$74M
Momentum
Top 1%
of companies Caplight tracks
Company Overview
Reactor is a developer platform company that provides infrastructure for real-time generative video and interactive AI world models.
Sector
AI, Data & Cloud Infrastructure
Verticals
Data Integration, Workflow Automation, Cloud Infrastructure, DevOps & Containers
Business Model
B2B
Customer Profile
Usage-Based SaaS
AI Layer
Infrastructure
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Reactor Comparables
Compare Reactor with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Dagster Labs | 87% | |
| Union.ai | 85% | |
| Kestra | 85% |
Reactor Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series A | Oct 5, 2026 | ||||
| Seed | Nov 1, 2025 |
Reactor Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Sky9 Capital | Seed, Series A |
| Sapphire Ventures | Series A |
| WndrCo | Seed, Series A |
| Amplify Partners | Seed, Series A |
| Yoonji Capital | Series A |
| Abstract Ventures | Seed, Series A |
| Lightspeed Venture Partners | Seed, Series A |
Market signals
Structured signals derived from secondary market and firmographic data.
- Oct 5, 2026
$59M round led by Lightspeed Venture Partners
- Jul 20, 2026
Open roles increased to 21, 3.5x headcount.
Recent news
Latest coverage and updates
- partners_withSep 7, 2026
Reactor partners with NVIDIA Corporation.
- partners_withAug 10, 2026
Reactor partnered with LTX on Aug 10th '26.
Reactor 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 Reactor's valuation, stock price, and market status.
Is Reactor a public or private company?
Reactor is a private company.
What is the current stock price of Reactor?
Reactor is a private company with no public stock price. No recent secondary market data is available.
How much is Reactor worth (valuation)?
Valuation information for Reactor is not publicly available.
Can I buy Reactor stock?
Reactor shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.
When was Reactor's last funding round?
Reactor's most recent funding round was Series A on May 29, 2026.
Who are the main investors in Reactor?
Key investors in Reactor include Lightspeed Venture Partners.
Will Reactor IPO soon?
No public IPO plans have been announced for Reactor.
How can I track Reactor secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Reactor's secondary market activity and sign up for updates.