Fiddler AI
Model monitoring and explainability platform for compliance
Ranked #3 in Best LLM evaluation tools, and on 3 more rankings.
Fiddler provides AI model monitoring with explainability and fairness features. The platform helps organisations understand model behaviour, detect bias, and maintain compliance documentation for audit purposes.
At a glance
| Price from | Custom |
| Best for | Data science teams and enterprises prioritising model transparency and fairness compliance |
From Fiddler AI's own website.
Company facts
| Social profiles | LinkedIn, X, YouTube, GitHub |
Facilities and features
Its website also mentions:
- Published pricing
- Free plan
- API
What stands out
Fiddler AI reduces evaluation costs by running models in your environment.
“Fiddler Centor Models power guardrails and evaluations in-environment, with no external LLM API calls, reducing the evaluation TCO by up to 98% compared to foundation models.”Fiddler AI, own website
Fiddler AI enforces policy inline with low latency.
“Second, Fiddler Guardrails enforce policy inline, at the agent s request and response path, in under 80ms,”Fiddler AI, own website
Worth knowing
- Smaller sales and support team compared to established enterprise vendors
- Requires technical expertise to configure monitoring thresholds and fairness metrics
How it ranks
Fiddler AI is ranked 3rd of 10 in Best LLM evaluation tools (Lister Score 88.0), 4th of 10 in Best LLM observability tools (Lister Score 88.0), 5th of 10 in Best AI governance platforms (Lister Score 88.0) and 6th of 10 in Self-hosted LLM observability tools (Lister Score 88.0).
#3 in Best LLM evaluation tools · Lister Score 88.0
Fiddler AI serves as the control plane for enterprise AI agents. It provides a system of trust across the agentic lifecycle.
The AI tool enforces policy inline at the agent request and response path.
How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 12.
“Continuous evaluation, reliable monitoring, enforceable policy, and auditable governance give enterprises the centralized controls and actionable insights to scale AI with trust.”Fiddler AI, own website
| Rank | Best LLM evaluation tools | Score |
|---|---|---|
| 1 | Giskard | 96.0 |
| 2 | Arize AI | 88.0 |
| 3 | Fiddler AI | 88.0 |
| 4 | Promptfoo | 88.0 |
| 5 | Athina | 86.0 |
| 6 | Kiln AI | 82.0 |
| 7 | MLflow AI Platform | 82.0 |
| 8 | PromptLayer | 82.0 |
| 9 | Babelscape | 80.0 |
| 10 | TruLens | 78.0 |
#4 in Best LLM observability tools · Lister Score 88.0
Fiddler AI serves as the control plane for enterprise AI agents. It provides a system of trust covering observability, policy enforcement, and governance.
Built for Enterprise security and compliance teams.
How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 12.
“Gartner, Market Guide for AI Evaluation and Observability Platforms, February 2026”Fiddler AI, own website
| Rank | Best LLM observability tools | Score |
|---|---|---|
| 1 | LangFuse | 92.0 |
| 2 | AgentOps | 88.0 |
| 3 | Arize AI | 88.0 |
| 4 | Fiddler AI | 88.0 |
| 5 | Weights and Biases | 88.0 |
| 6 | HoneyHive | 84.0 |
| 7 | MLflow AI Platform | 82.0 |
| 8 | PromptLayer | 82.0 |
| 9 | Dynamiq | 80.0 |
| 10 | FloTorch | 76.0 |
#5 in Best AI governance platforms · Lister Score 88.0
Fiddler AI serves as the control plane for enterprise AI agents. It provides a system of trust across the agentic lifecycle.
Built for Enterprise security and compliance teams.
How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 12.
“Everest Group, Innovation Watch: AI Governance Platforms, 2026”Fiddler AI, own website
| Rank | Best AI governance platforms | Score |
|---|---|---|
| 1 | Dynamiq | 94.0 |
| 2 | Cake | 92.0 |
| 3 | Grengin | 92.0 |
| 4 | Growth Protocol | 90.0 |
| 5 | Fiddler AI | 88.0 |
| 6 | NeuralSeek | 88.0 |
| 7 | Iterate.ai | 84.0 |
| 8 | OneTrust | 84.0 |
| 9 | Credo AI | 80.0 |
| 10 | DataRobot | 78.0 |
#6 in Self-hosted LLM observability tools · Lister Score 88.0
Fiddler AI provides a control plane for enterprise agents. It ensures trust through observability and governance.
Enforces policy inline with low latency.
How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 12.
“ML Observability Deliver high performing AI solutions at scale”Fiddler AI, own website
“Yes. Fiddler deploys in any secure cloud environment or VPC.”Fiddler AI, own website
| Rank | Self-hosted LLM observability tools | Score |
|---|---|---|
| 1 | LangFuse | 92.0 |
| 2 | Morph | 92.0 |
| 3 | Manifest | 90.0 |
| 4 | Shakudo | 90.0 |
| 5 | Entelligence AI | 88.0 |
| 6 | Fiddler AI | 88.0 |
| 7 | axem | 84.0 |
| 8 | Iterate.ai | 84.0 |
| 9 | MLflow AI Platform | 82.0 |
| 10 | PromptLayer | 82.0 |
Frequently asked questions
How does Fiddler AI rank on Lister?
Fiddler AI is ranked 3rd of 10 in Best LLM evaluation tools (Lister Score 88.0), 4th of 10 in Best LLM observability tools (Lister Score 88.0), 5th of 10 in Best AI governance platforms (Lister Score 88.0) and 6th of 10 in Self-hosted LLM observability tools (Lister Score 88.0).