kitio.aiArthur vs Plexe
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Arthur starts at $60/mo and Plexe 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
- Evals and observability
- Guardrails
- Agents
- Memory
- Model building
- VPC deployment
| Feature | Arthur | Plexe |
|---|---|---|
| Best for | Discovery, monitoring and governance for enterprise AI agents | Enterprise platform for building and running production AI |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Paid |
| Starting price | $60/mo | See pricing page |
| Free plan | Yes | No |
| Made by | Arthur AI | Plexe |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Arthur starts at $60/mo and Plexe 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
Plexe
- Runs inside your cloud
- Includes evals and guardrails
- SOC 2 Type 2
- Enterprise sales process
- No public pricing
- Not aimed at hobby projects
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 Plexe if you want:
- Runs inside your cloud
- Includes evals and guardrails
- SOC 2 Type 2
Watch out: enterprise sales process.
Arthur vs Plexe FAQ
What is the difference between Arthur and Plexe?
Arthur: Discovery, monitoring and governance for enterprise AI agents. Plexe: Enterprise platform for building and running production AI. Both are models & apis tools.
Is Arthur or Plexe cheaper?
Arthur starts at $60/mo and Plexe starts at See pricing page. Check both pricing pages for current plans.
Do Arthur and Plexe have free plans?
Arthur: Yes. Plexe: No.
Who makes Arthur?
Arthur is made by Arthur AI, based in United States.
Who makes Plexe?
Plexe is made by Plexe.
Which should I choose, Arthur or Plexe?
Choose Arthur if you value finds shadow agents across environments and free tier with unlimited seats. Choose Plexe if you value runs inside your cloud and includes evals and guardrails.