Arize AI vs Fiddler AI vs WhyLabs
LLM and ML observability platforms. Source-verified data as of September 2026.
Arize AI
Berkeley, United States
Ship Agents that Work — AI & Agent Engineering Platform for development, observability, and evaluation.
Contact for pricing
Fiddler AI
Palo Alto, United States
AI observability and security platform for enterprise ML and LLM applications
Contact for pricing
WhyLabs
Seattle, United States
The AI Observability Platform
Contact for pricing
Framework coverage
Which frameworks each vendor publicly claims to support. Sourced from their own product pages.
| Framework | Arize AI | Fiddler AI | WhyLabs |
|---|---|---|---|
| EU Artificial Intelligence Act | Partial | ||
| Health Insurance Portability and Accountability Act | Partial | ||
| SOC 2 (Service Organization Control 2) | Certified |
Core facts
| Founded | 2020 | 2018 | 2019 |
| HQ | Berkeley, United States | Palo Alto, United States | Seattle, United States |
| Employees | 51-200 | 51-200 | 11-50 |
| Pricing | Contact for pricing | Contact for pricing | Contact for pricing |
| Open source | no | no | no |
| Status | active | active | acquired-discontinued |