Side by side
Aequitas vs Arthur
Both stand on ai model explainability software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxWeb
Visit Aequitas 
Free plan APISelf-hostedWeb
Arthur combines agent discovery, observability, and policy controls with hosted, on-premises, and hybrid deployment choices. The Free plan has defined use-case, project, and retention limits; Enterprise pricing requires a custom quote.
Visit ArthurThe facts
| Aequitas | Arthur | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Web | API, Self-hosted, Web |
| Lowest paid plan | Not published | Premium: $60 a month |
| Plans published | None | 3 |
| Maker | Not published | Not published |
| Website | dssg.github.io | arthur.ai |
| On ai model explainability software | #4 of 29 | #1 of 29 |
Aequitas: what it does well
Arthur: what it does well
- Monitors agent activity across several discovery sources.
- Traces tool calls, context, costs, and latency.
- Provides real-time policy verdicts for listed risks.
- Hosted, on-premises, and hybrid deployments are available.
- Free plan includes up to 4 use cases.
What to know first
- Free plan retains data for 7 days.
- Free plan is limited to 2 projects.
- Premium is $60 a month.
- Enterprise pricing is custom.
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