kitio.aiArthur vs Adaline
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Arthur starts at $60/mo and Adaline starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Agent discovery
- Step-level tracing
- Runtime guardrails
- Audit logs and lineage
- Custom metrics and alerts
- Trace ingestion
- Behavior maps
- Auto-generated evals
- Synthetic test data
- Reviewed agent improvements
- SSO and SAML
| Feature | Arthur | Adaline |
|---|---|---|
| Best for | Discovery, monitoring and governance for enterprise AI agents | Observability and evals that turn agent traces into fixes |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $60/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Arthur AI | Adaline Inc. |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Arthur starts at $60/mo and Adaline starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Up to 4 monitored use cases
- Unlimited seats
- Cloud data connectors
Premium
$60/mo
- Up to 100 use cases
- Custom metrics and dashboards
- Custom alerts and webhooks
Enterprise
Contact sales
- Dedicated infrastructure
- Governance and support
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Arthur
- Finds shadow agents across environments
- Free tier with unlimited seats
- Covers security and evaluation together
- Free tier monitors only 4 use cases
- Enterprise features need a sales call
- Broad platform takes time to set up
Adaline
- Evals built from real production data
- Usable by non-engineers
- Strong compliance coverage
- Pricing not published on the homepage
- Built for teams already in production
- Value depends on trace volume
Which one should you choose?
Choose Arthur if you want:
- Finds shadow agents across environments
- Free tier with unlimited seats
- Covers security and evaluation together
Watch out: free tier monitors only 4 use cases.
Choose Adaline if you want:
- Evals built from real production data
- Usable by non-engineers
- Strong compliance coverage
Watch out: pricing not published on the homepage.
Arthur vs Adaline FAQ
What is the difference between Arthur and Adaline?
Arthur: Discovery, monitoring and governance for enterprise AI agents. Adaline: Observability and evals that turn agent traces into fixes. Both are models & apis tools.
Is Arthur or Adaline cheaper?
Arthur starts at $60/mo and Adaline starts at See pricing page. Check both pricing pages for current plans.
Do Arthur and Adaline have free plans?
Arthur: Yes. Adaline: Yes.
Who makes Arthur?
Arthur is made by Arthur AI, based in United States.
Who makes Adaline?
Adaline is made by Adaline Inc., based in United States.
Which should I choose, Arthur or Adaline?
Choose Arthur if you value finds shadow agents across environments and free tier with unlimited seats. Choose Adaline if you value evals built from real production data and usable by non-engineers.