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
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
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Frequently Asked Questions
Common questions about Fiddler's valuation, stock price, and market status.