# Arize AI vs Fiddler AI: who uses which

On usedby, 35 companies use Arize AI and 10 use Fiddler AI. No company is listed with both yet. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-06: 40 of 45 public lines checked.

## Side by side

|  | [Arize AI](https://www.usedby.ai/tools/arize-ai.md) | [Fiddler AI](https://www.usedby.ai/tools/fiddler-ai.md) |
|---|---|---|
| Public customers | 35 | 10 |
| Confirmed | 9 | 1 |
| Observed | 26 | 9 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Marketing Tech (4), Travel & Hospitality (4), DevTools & Infrastructure (2) | Fintech & Payments (2), Government & GovTech (1), Insurance & InsurTech (1) |
| Category | LLM Ops & Frameworks | LLM Ops & Frameworks |
| Free trial | Free trial or free plan available. ([arize.com](https://arize.com/pricing/), checked 2026-10-04) | Free trial or free plan available. ([fiddler.ai](https://www.fiddler.ai/pricing), checked 2026-10-08) |
| Integrations | Antigravity, Claude Code, Codex, GitHub Copilot, Cursor, Devin, Gemini CLI, Kiro, Oh My Pi, OpenCode ([arize.com](https://arize.com/docs/ax/integrations), checked 2026-10-04) | — |
| Data processing terms | — | A data processing agreement is available. ([fiddler.ai](https://www.fiddler.ai/legal/dpa), checked 2026-10-08) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Arize AI: [Handshake](https://www.usedby.ai/case-studies/handshake-arize-ai.md): **15+**: “The approach enabled 15+ production use cases in the first six months” (captured by usedby 2026-10-05)
- Arize AI: [Booking.com](https://www.usedby.ai/case-studies/booking-com-arize-ai.md): story without a checked figure. (captured by usedby 2026-10-05)

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Source: https://www.usedby.ai/compare/arize-ai-vs-fiddler-ai · How we check: https://www.usedby.ai/methodology