Fiddler AI vs Portkey
Side-by-side from the Top 11 rankings of Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026 and Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026. Last verified May 31, 2026.
The short answer
Portkey ranks higher on Top 11 (#6 vs #7) for ML engineers and AI product teams measuring model quality / AI engineers managing and versioning production prompts. Combines a robust AI gateway with solid prompt management tools.
At a glance
| Fiddler AI | Portkey | |
|---|---|---|
| Top 11 rank | #7 / Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026 | #6 / Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026 |
| Score (out of 9.4) | 8 | 8.2 |
| Best for | Enterprise model management | AI gateway and prompt management |
| Pricing | $$$$ (Custom Enterprise Pricing) | $$ ($100 to $1,000+/mo) |
| HQ | Palo Alto, USA | Bengaluru, India |
| Founded | 2018 | 2023 |
Fiddler AI
A mature, comprehensive platform for managing both LLM and classical ML models in the enterprise.
www.fiddler.ai/See full entry in Galileo vs LangSmith vs Arize AI: 11 Best LLM Evaluation Platforms 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.