Fiddler
PrivateLast Round
Series C
Jan 27, 2026
Est. Valuation
$126.24M
Total Funding Raised
$112.74M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
Fiddler is a software company that provides an AI observability and security platform for responsible AI, offering tools for monitoring, explaining, and managing machine learning models.
Sector
AI, Data & Cloud Infrastructure
Verticals
ML Platforms, Data Governance, Compliance & Risk, NLP & Conversational AI
Business Model
B2B
Customer Profile
Subscription SaaS, Usage-Based SaaS, Government Contracts, Freemium, Services & Consulting
AI Layer
Infrastructure
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Fiddler Comparables
Compare Fiddler with similar companies based on industry and business-model similarity.
Fiddler Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series C | Jan 27, 2026 | ||||
| Series B Extension | Dec 12, 2024 | ||||
| Series B Extension | Sep 10, 2024 | ||||
| Series B | Jun 17, 2021 | ||||
| Series A | Sep 25, 2019 | ||||
Seed | Oct 1, 2018 |
Key People
Founding team and executive leadership
Fiddler Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| RPS Ventures | Series C |
| Essence VC | Series B Extension |
| Lockheed Martin Ventures | Series B |
| Haystack | Series A, Seed, Series B |
| Netshire | Series B Extension |
| LG Technology Ventures | Series C |
| Lux Capital | Series B Extension, Series C, Series B, Series A |
Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 10, 2026
Developing AI Control Plane, a runtime control plane for AI.
- Apr 10, 2026
Acquired Lumeus AI to bridge AI observability and data security.
Fiddler 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 Fiddler's valuation, stock price, and market status.
Is Fiddler a public or private company?
Fiddler is a private company.
What is the current stock price of Fiddler?
Fiddler is a private company with no public stock price. No recent secondary market data is available.
How much is Fiddler worth (valuation)?
Fiddler's valuation is estimated at $126.2M based on funding round data.
Can I buy Fiddler stock?
Fiddler 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 Fiddler's last funding round?
Fiddler's most recent funding round was Series C on September 10, 2024.
Who are the main investors in Fiddler?
Key investors in Fiddler include RPS Ventures, Lux Capital, Insight Partners, Lightspeed Venture Partners.
Will Fiddler IPO soon?
No public IPO plans have been announced for Fiddler.
How can I track Fiddler secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Fiddler's secondary market activity and sign up for updates.