Arthur
6.7#1 in ai model explainability softwareFrom $60 a monthFree planWebAPISelf-hosted
VisitArthur vs Fiddler AI
Fiddler AI
6.4#2 in ai model explainability softwareFree planFree planWebAPISelf-hosted
VisitWhat both publish
| Fact | Arthur | Fiddler AI |
|---|---|---|
| Deployment | Arthur offers hosted SaaS, on-premises, and hybrid deployment options; its hybrid evals engine runs next to customer workloads so sensitive data stays in the environment. | The product page lists cloud SaaS, VPC, on-premises, and air-gapped deployment options. |
| Governance | The platform supports machine-checkable policies and real-time guardrail verdicts for prompt injection, PII exposure, restricted models, and off-policy tool use. | The platform records decisions, actions, evaluations, and policy outcomes and supports audit evidence for requirements including GDPR, HIPAA, NAIC, and SR 11-7. |
| Headquarters | Arthur’s privacy policy identifies the company as headquartered in Washington, DC. | Palo Alto, California, United States |
| Integrations | Documented integrations include OpenAI, Anthropic, LangChain, LiteLLM, CrewAI, LlamaIndex, OpenAI Agents, Google ADK, AWS Bedrock, and Mastra. | Fiddler’s integration documentation lists connections including Snowflake, BigQuery, Amazon S3, Kafka, Airflow, Databricks, MLflow, Datadog, PagerDuty, Okta, and Google Workspace. |
| Product | Arthur discovers agents across enterprise environments and provides a common framework to observe and govern them. | Fiddler describes its platform as providing unified observability and security for AI agents and predictive applications. |
Arthur plans
- FreeFree
- Premium$60 a month
- EnterprisePriced on request
Fiddler AI plans
- DeveloperPriced on request
- FreeFree
- EnterprisePriced on request
Pick Arthur if…
Arthur suits organizations that need to discover and monitor agents across multiple enterprise systems, with governance controls for agent behavior. Its Free plan may fit teams monitoring up to 4 use cases.
Pick Fiddler AI if…
You want what its maker publishes above — check its page for the details.