Who uses Fiddler AI?
Observability, evaluations and guardrails control plane for AI agents and predictive ML models. fiddler.ai
10
companies use Fiddler AI
10 companies use Fiddler AI. 20% are in Fintech & Payments. Confirmed or observed customers include Mastercard, Boston Scientific, and Thumbtack. 1 of them is confirmed by a published case study, quote or press release.Latest check Oct 6, 2026: 10 of 10 companies checked, from 4 public sources.
- Category
- LLM Ops & Frameworks
- Customers by proof
- 1 confirmed, 9 observed
- Top industry
- Fintech & Payments, 20% of customers
- Most similar
- LangSmith, no shared customer yet
- Website
- fiddler.ai
What Fiddler AI does
Fiddler AI monitors agentic and predictive AI systems in production, runs continuous evaluations and enforces policies through low-latency guardrails powered by its own Fiddler Centor models. It detects hallucinations, toxicity, PII/PHI exposure, prompt injection and jailbreaks, and adds governance and compliance reporting. It serves enterprises in regulated sectors such as financial services, insurance, healthcare and government.
Written by usedby from fiddler.ai.
Main features
Common uses
Works with
10 companies use Fiddler AI
Every company below links to the public page that shows it uses Fiddler AI. Open a row to see the dated capture.
Customers over time: appears once we have six months of archived captures.
| Company | Industry | Proof |
|---|---|---|
 Mastercard | Fintech & Payments | |
 Boston Scientific | Medical Devices | |
 Thumbtack | Marketplace | |
 Nielsen | — | |
 American Family Insurance | Insurance & InsurTech | |
 Curinos | — | |
 Global Payments | Fintech & Payments | |
 LendingPoint | — | |
 Oscilar | — | |
 U.S. Department of Energy | Government & GovTech |
Is Fiddler AI right for your company?
See what companies in your industry use, from the companies we track. Pick your industry.
Of the 131 Fintech & Payments companies on usedby, 2 are listed as Fiddler AI customers. 12 use only another LLM Ops & Frameworks tool.
- Fiddler AI only, 2%
- Fiddler AI and another tool in LLM Ops & Frameworks, 0%
- Another tool in LLM Ops & Frameworks only, 9%
- No LLM Ops & Frameworks tool we can see, 89%
These are companies usedby tracks because a public page names them, often Fiddler AI's own customer page. It is not a market share. A company counts once, whatever the number of tools it uses.
What customers report
Results as published by Fiddler AI and its customers. Each one links to its dated source. We quote, we do not score.
Fiddler delivered unified observability, protection, and governance across agents and predictive models, making it fundamental to our AI strategy. We are especially looking forward to the upcoming rollout of the control plane and the intelligent orchestration it will bring as our AI footprint grows.Fiddler delivered unified observability, protection, and governance across agents and predictive models, making it fundamental to our AI strategy.Before you buy Fiddler AI
What Fiddler AI publishes on the points buyers check first, each with its source and check date.
| Data processing terms | A data processing agreement is available. | fiddler.ai, checked Oct 8, 2026 |
|---|---|---|
| Free trial | Free trial or free plan available. | fiddler.ai, checked Oct 8, 2026 |
Questions to ask in your demo
- Which of your customers look like us, by industry and size?
- What does a pilot cost, and what decides the move to a full contract?
- Where is our data stored, who can access it, and is it used to train models?
- How does Fiddler AI work with the tools we already use?
Fiddler AI alternatives
Tools compared with Fiddler AI most often, with the customers they share.
| Tool | Customers | Shared with Fiddler AI | Compare |
|---|---|---|---|
 LangSmith43 customers, 0 shared | 43 | 0 | Fiddler AI vs LangSmith |
 Braintrust39 customers, 0 shared | 39 | 0 | Fiddler AI vs Braintrust |
 Arize AI35 customers, 0 shared | 35 | 0 | Fiddler AI vs Arize AI |
Questions about Fiddler AI
Who uses Fiddler AI?
10 companies use Fiddler AI, including Mastercard, Boston Scientific, and Thumbtack.
Which industries use Fiddler AI?
The industries with the most Fiddler AI customers are Fintech & Payments (2), Government & GovTech (1), and Insurance & InsurTech (1).
What are the alternatives to Fiddler AI?
The tools compared with Fiddler AI most often are LangSmith (43 customers, 0 shared), Braintrust (39 customers, 0 shared), and Arize AI (35 customers, 0 shared). See all Fiddler AI alternatives.
How does usedby know who uses Fiddler AI?
Each company is linked to a public page that names it: Fiddler AI's customer page, a published case study, a press release or a job post. We save each page with a dated capture and check it again on each run. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
What do confirmed, observed and signal mean?
Confirmed (1): a case study, a named quote or a press release. Observed (9): Fiddler AI shows the company on its own pages, for example a logo wall. Signal (0): a job post shows the company’s employees use Fiddler AI, the weakest proof. Every level counts as a customer, and each line shows its level.
How current is this list?
The most recent check was on October 6, 2026, and 10 of 10 companies on this list have been checked so far. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
Changes and sources
New customers
No new customer yet. Tracking of Fiddler AI started on October 6, 2026. New customers appear after two complete checks of its pages.