Hephaestus Technologies
PrivateLast Round
Early Funding
Oct 21, 2026
Total Funding Raised
$20.7M
Momentum
Top 1%
of companies Caplight tracks
Company Overview
Hephaestus Technologies is a research and development company that develops AI-accelerated simulation and control engines for fusion plasma modeling and superconducting magnet discovery.
Sector
Energy & Sustainability
Verticals
Advanced Materials, Clean Manufacturing, Renewable Energy, Energy Storage
Business Model
B2B
Customer Profile
Services & Consulting, Hardware Sales, Subscription SaaS
AI Layer
Application
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Hephaestus Technologies Comparables
Compare Hephaestus Technologies with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| VeloAlpha | 83% | |
| Geminus AI | 61% | |
| NVIDIA | 60% |
Hephaestus Technologies Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Early Funding | Oct 21, 2026 | ||||
| Seed | Sep 8, 2023 | ||||
| Seed | Aug 1, 2023 |
Hephaestus Technologies Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Atypical | Seed |
| Unruly Capital | Early Funding, Seed |
| Essence VC | Seed |
| Moonstone VC | Seed |
| Climate Capital | Early Funding, Seed |
| CiRi Ventures | Early Funding |
| Teampact Ventures | Early Funding, Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Oct 21, 2026
$17.2M raised, led by CiRi Ventures.
- Sep 20, 2026
Grew 144% QoQ, from 9 to 22 employees.
Hephaestus Technologies 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 Hephaestus Technologies's valuation, stock price, and market status.
Is Hephaestus Technologies a public or private company?
Hephaestus Technologies is a private company.
What is the current stock price of Hephaestus Technologies?
Hephaestus Technologies is a private company, so its shares have no public market price. Caplight tracks Hephaestus Technologies's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Hephaestus Technologies worth (valuation)?
Valuation information for Hephaestus Technologies is not publicly available.
Can I buy Hephaestus Technologies stock?
Hephaestus Technologies shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Hephaestus Technologies's last funding round?
Hephaestus Technologies's most recent funding round was Early Funding on October 21, 2026.
Who are the main investors in Hephaestus Technologies?
Key investors in Hephaestus Technologies include CiRi Ventures.
Will Hephaestus Technologies IPO soon?
No public IPO plans have been announced for Hephaestus Technologies.
How can I track Hephaestus Technologies secondary market activity?
Caplight tracks bids, offers, and trades in Hephaestus Technologies's shares on secondary markets.