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Fiddler

AI · Palo Alto, United States · Founded 2018

AI observability platform for model monitoring and explanation MoreLess

Fiddler AI is a company that provides a Responsible AI Platform designed to help organizations build and maintain trustworthy AI solutions. The platform offers a suite of tools for monitoring, explaining, validating, and analyzing machine learning models in production.

The company primarily serves data science and MLOps teams in enterprises that are deploying AI models at scale. These clients operate in various sectors, including financial services, healthcare, and technology, where the reliability and fairness of AI systems are critical.

The business model is based on a subscription-based software-as-a-service (SaaS) model. Customers pay for access to the Fiddler AI platform, with pricing likely tiered based on the number of models monitored and the volume of data processed. This model provides a recurring revenue stream for the company.

Fiddler AI's platform addresses the growing need for transparency and accountability in artificial intelligence. It enables organizations to understand why their models make certain decisions, identify and mitigate biases, and ensure compliance with regulatory requirements. By providing these capabilities, Fiddler AI helps its clients reduce risks associated with AI, improve model performance, and build trust with their customers.

Keywords: Responsible AI, AI observability, MLOps, model performance management, explainable AI, model monitoring, AI governance, machine learning, data science, AI analytics

Valuation $100–500M
Revenue $1–10M
Headcount 100–500
Total funding $50–100M
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Fiddler and the history behind them.

Company overview

Fiddler company information

The essential company record, classifications and operating signals in one place.

Status
Operational
Founded
2018
Headquarters
Palo Alto, United States
Employees
114
Open positions
5
Dealroom signal
82.2
Investment activity
1 companies · latest Apr 2026
Capital deployed
Preferred round
ACQUISITION
client focusb2btechnologyArtificial IntelligencetechnologyBig DatatechnologyDeep TechtechnologyMachine LearningtechnologyDeep LearningtechnologyNatural Language ProcessingtechnologyComputer Visionbusiness modelSaaSsectorCore AIsectorSafetytech RelatedsectorGovernance, Risk and CompliancesectorNovel AIsectorExplainable AI

Valuation & funding

Fiddler funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SERIES COther financing Jan 2026 $30M $120M Insight Partners · LDV Partners · Mozilla Ventures · Lightspeed Venture Partners
SERIES BOther financing Dec 2024 $19M $160M ISAI Gestion · Lux Capital · Cisco Investments · Samsung Next
LATE VCOther financing Apr 2023 $0 Alteryx
SERIES BOther financing Jun 2021 $32M $128M Lightspeed Venture Partners · Lux Capital · Amazon Alexa Fund · Lockheed Martin Global
EARLY VCOther financing Aug 2020 $0 Lockheed Martin Global
SERIES AOther financing Sep 2019 Bloomberg Beta · Haystack · Lightspeed Venture Partners · Lux Capital
SEEDOther financing Oct 2018 Lightspeed Venture Partners · Haystack · Bloomberg Beta
Showing 7 recorded eventsUnlock the complete deal history →

Financials

Revenue and workforce over time

Available revenue and workforce history. Fields without reported data are omitted.

YearRevenueGrowthEmployees
2026 $8.4M 0% 114
2025 $8.4M 0% 104
2024 $8.4M 0% 80
2023 $8.4M 0% 69
2022 $8.4M +94.9% 66
2021 $4.3M +65.4% 61
2020 $2.6M 34
Company filings, research estimates and Dealroom dataOpen the full financial model →

Growth signals

Fiddler website traffic

Latest recorded traffic for Fiddler is 55K monthly website visits, down 14.1% over the last three months. Fiddler's team grew 9.6% over the past year.

Latest monthly visits55K 3-month web change-14.1% 1-year team growth+9.6%
Monthly website visits90 observations · Dec 2018–Jul 2026
Hover or focus a point to see its exact monthly valueCompare with peers →

Comparisons

Fiddler compared with similar companies

Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.

CompanyHeadquartersStatusEmployeesTotal fundingValuation
GoodfireAI interpretability infrastructure for understanding, editing, and debugging of AI models at scale San Francisco, United States Operational 66 $207M $1.3B
DeeploySimplifies the deployment and governance of AI models, focusing on transparency, explainability, and regulatory compliance Utrecht, Netherlands Operational
Virtue AIAI-native security and compliance platform for enterprises San Francisco, United States Acquired
Aligned AIDeveloping a sophisticated alignment system for AI, ensuring it focuses on appropriate tasks and avoids unnecessary actions Oxford, United Kingdom Operational
OpenMachineWe're putting the power of large language models into everyone's hands Delaware, United States Operational
Stanhope AIA start-up based in London, we work with the US Department of Defense (DoD) and the UK Ministry of Defence (MoD) to build next-generation generative autonomous decision-making systems that embody human cognitive processes for on-board device decisions that are safe, explainable and data-lean London, United Kingdom Operational
LatticeFlowA company founded by leading AI researchers from ETH Zurich with the mission to empower organizations to build and deploy trustworthy AI Zurich, Switzerland Operational
AI21 LabsEnterprise-focused foundation models and AI systems Tel Aviv-Yafo, Israel Operational
Showing 8 of the closest matchesCompare every metric →

Capital deployed

Fiddler investments and acquisitions

Recent portfolio relationships for companies that also act as investors or acquirers.

Talent graph

Fiddler's talent

Book a demo to see the people
Team profiled 19 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 4 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Investors

22 investors on Fiddler's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Series A 11 investors entered at this stage
Lux Capital
Lockheed Martin Global
Insight Partners
Amazon Alexa Fund
ISAI Gestion
Cisco Investments
Samsung Next
Alpha Square Group
Dallas Venture Capital
Dentsu
Essence Venture Capital
Series B+ 8 investors entered at this stage
Alteryx
RPS Ventures
LDV Partners
Mozilla Ventures
Capgemini
Benhamou Global Ventures
Dentsu Ventures
LG Technology Ventures

Global footprint

Where Fiddler has talent and traffic

Workforce by country
7 countries with
team presence
🇺🇸 United States74.7%
🇮🇳 India17.2%
🇨🇦 Canada3.5%
🇫🇷 France1.1%
🇦🇪 United Arab Emirates1.1%
Top 5 of 7 shown

In the news

Latest news about Fiddler

Recent press, funding announcements, and product moves mentioning Fiddler — open to read from the original sources.

See all news

Market sentiment

What the market is saying about Fiddler

An AI-synthesized read of the highest-engagement posts about Fiddler on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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