kitio.aiArize AI vs Confident AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Arize AI has the lower starting price: about $50 a month, against $200 for Confident AI.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Arize Phoenix open source
- Agent tracing
- Online evaluations
- Drift monitoring
- Debugging copilot
- DeepEval metrics
- Pytest integration
- Dataset management
- Regression testing
- Production monitoring
| Feature | Arize AI | Confident AI |
|---|---|---|
| Best for | AI observability and evaluation, plus the open-source Phoenix | LLM evaluation platform built on the open-source DeepEval framework |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $50/mo | $200/mo |
| Free plan | Yes | Yes |
| Made by | Arize AI | Confident AI |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
Arize AI has the lower starting price: about $50 a month, against $200 for Confident AI.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
AX Free
Free
- 25k spans/month
- 1 GB ingestion/month
- 15 days retention
- Unlimited users
AX Pro
$50/mo
- 50k spans/month
- 10 GB ingestion/month
- 30 days retention
AX Enterprise
Contact sales
- Custom plans
4 plans
Free
Free
- LLM unit and regression testing
- LLM tracing
- 1 GB-month of trace spans
Starter
$200/mo
- No-code eval workflows
- Unlimited user seats
- Up to 5 projects
- 5 GB-months of trace spans
Team
$2000/mo
- Metric and dataset versioning
- Custom RBAC
- Unlimited projects
- 75 GB-months of trace spans
Enterprise
Custom
- On-prem deployment
- Custom data residency
- AI red teaming and governance
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Arize AI
- Free open-source Phoenix
- Covers classic ML and LLMs
- Strong enterprise features
- AX costs rise with volume
- Two products can confuse
- Steeper setup than simple tools
Confident AI
- Popular open-source base
- Unit-test style workflow
- Many built-in metrics
- LLM-judge metrics add cost
- Cloud features need a plan
- Small company
Which one should you choose?
Choose Arize AI if you want:
- Free open-source Phoenix
- Covers classic ML and LLMs
- Strong enterprise features
Watch out: ax costs rise with volume.
Choose Confident AI if you want:
- Popular open-source base
- Unit-test style workflow
- Many built-in metrics
Watch out: llm-judge metrics add cost.
Arize AI vs Confident AI FAQ
What is the difference between Arize AI and Confident AI?
Arize AI: AI observability and evaluation, plus the open-source Phoenix. Confident AI: LLM evaluation platform built on the open-source DeepEval framework. Both are models & apis tools.
Is Arize AI or Confident AI cheaper?
Arize AI has the lower starting price: about $50 a month, against $200 for Confident AI.
Do Arize AI and Confident AI have free plans?
Arize AI: Yes. Confident AI: Yes.
Who makes Arize AI?
Arize AI is made by Arize AI, based in United States.
Who makes Confident AI?
Confident AI is made by Confident AI, based in United States.
Which should I choose, Arize AI or Confident AI?
Choose Arize AI if you value free open-source phoenix and covers classic ml and llms. Choose Confident AI if you value popular open-source base and unit-test style workflow.