# Who uses Fiddler AI?

10 companies use Fiddler AI on usedby: 1 confirmed, 9 observed and 0 signals. 20% of them are in Fintech & Payments. Confirmed or observed customers include Mastercard, Boston Scientific and Thumbtack. Latest check 2026-10-06: 10 of 10 companies checked, from 4 public sources.

> Observability, evaluations and guardrails control plane for AI agents and predictive ML models.

- Category: [LLM Ops & Frameworks](https://www.usedby.ai/tools/category/llm-ops-frameworks.md)
- Website: [fiddler.ai](https://www.fiddler.ai/)

## Customers

Every line is a customer, at one of three proof levels: confirmed (a case study, a named quote or a press release), observed (the vendor shows the company on its own pages) or signal (a job post shows the company's employees use the tool, the weakest proof). The first public proof is the first public page we found, not an adoption date.

| Company | Industry | Proof | First public proof | Source |
|---|---|---|---|---|
| [Mastercard](https://www.usedby.ai/companies/mastercard.md) | Fintech & Payments | Observed | — | [fiddler.ai](https://www.fiddler.ai/), captured 2026-10-06 |
| [Boston Scientific](https://www.usedby.ai/companies/boston-scientific.md) | Medical Devices | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [Thumbtack](https://www.usedby.ai/companies/thumbtack.md) | Marketplace | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [Nielsen](https://www.usedby.ai/companies/nielsen.md) | — | Confirmed | — | [fiddler.ai](https://www.fiddler.ai/customers/leading-financial-services-institution), captured 2026-10-06 |
| [American Family Insurance](https://www.usedby.ai/companies/american-family-insurance.md) | Insurance & InsurTech | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [Curinos](https://www.usedby.ai/companies/curinos.md) | — | Observed | — | [fiddler.ai](https://www.fiddler.ai/), captured 2026-10-06 |
| [Global Payments](https://www.usedby.ai/companies/global-payments.md) | Fintech & Payments | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [LendingPoint](https://www.usedby.ai/companies/lendingpoint.md) | — | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [Oscilar](https://www.usedby.ai/companies/oscilar.md) | — | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |
| [U.S. Department of Energy](https://www.usedby.ai/companies/u-s-department-of-energy.md) | Government & GovTech | Observed | — | [fiddler.ai](https://www.fiddler.ai/customers), captured 2026-10-06 |

## Before you buy

Read on Fiddler AI’s own pages; the quote was found on the cited page.

| Fact | Value | Source | Checked |
|---|---|---|---|
| Data processing terms | A data processing agreement is available. | [fiddler.ai](https://www.fiddler.ai/legal/dpa) | 2026-10-08 |
| Free trial | Free trial or free plan available. | [fiddler.ai](https://www.fiddler.ai/pricing) | 2026-10-08 |

## Alternatives

- [LangSmith](https://www.usedby.ai/tools/langsmith.md): 43 public customers. Compare: https://www.usedby.ai/compare/fiddler-ai-vs-langsmith.md
- [Braintrust](https://www.usedby.ai/tools/braintrust.md): 39 public customers. Compare: https://www.usedby.ai/compare/braintrust-vs-fiddler-ai.md
- [Arize AI](https://www.usedby.ai/tools/arize-ai.md): 35 public customers. Compare: https://www.usedby.ai/compare/arize-ai-vs-fiddler-ai.md

More: https://www.usedby.ai/alternatives/fiddler-ai.md

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Source: https://www.usedby.ai/tools/fiddler-ai · How we check: https://www.usedby.ai/methodology