fiddler.ai
fiddler.ai is an artificial intelligence company in Palo Alto, United States, founded in 2018. It has raised $124.8M across 6 rounds, most recently a $30.0M Series C in January 2026.
The AI Control Plane for Enterprise Agents
- Headquarters
- Palo Alto, California
- Employees
- 51–200
- Founded
- 2018
- Business Model
- B2B
- Website
- fiddler.ai
- Total Funding
- $124.8M
- Last Round
- $30.0M Series CJan 2026
- Rounds
- 6
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 6 funding rounds and 18 investors for this company. The full record is or through the API.
About
Fiddler AI is a pioneer in AI Observability and the AI Control Plane for enterprise AI and agentic systems. Founded in 2018 and headquartered in Palo Alto, California, Fiddler provides a unified platform for monitoring, explaining, analyzing, and securing AI models, LLM applications, and autonomous agents throughout the agentic lifecycle. Its platform delivers end-to-end observability, guardrails, trust evaluation, and AI governance capabilities — enabling enterprises in financial services, government, healthcare, and insurance to deploy AI responsibly at scale. Fiddler serves customers including Nielsen, Mastercard, and the US Navy, and integrates with Google Cloud Vertex AI, Amazon SageMaker, and NVIDIA NIM.
Summary
It lists 51–200 employees. It has raised $124.8M in total across 6 rounds, most recently a $30.0M Series C round in Jan 2026. Investors include Lightspeed Venture Partners, Insight Partners and Haystack.
Tech & App Stack
10 technologies & apps tracked
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Funding History
Jan 2026
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Funding: Seed through Series C. Amounts, valuations, and investors where available.
Investors
Lightspeed Venture Partners
5 rounds
Insight Partners
4 rounds
Haystack
3 rounds
RPS Ventures
2 rounds
Lux Capital
5 rounds
Capgemini Ventures
3 rounds
Dallas Venture Capital
2 rounds
Dentsu Ventures
2 rounds
Bloomberg Beta
2 rounds
Lockheed Martin Ventures
2 rounds
Mozilla Ventures
1 round
LG Technology Ventures
1 round
Benhamou Global Ventures
1 round
LDV Capital
1 round
Alpha Square
1 round
Samsung Next
1 round
Cisco Systems
1 round
Essence Venture Capital
1 round
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