kitio.aiArize AI vs OpenLIT
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Arize AI starts at $50/mo and OpenLIT 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
- Arize Phoenix open source
- Agent tracing
- Online evaluations
- Drift monitoring
- Debugging copilot
- LLM and agent tracing
- Evals
- Guardrails
- Prompt management
- Cost and GPU monitoring
| Feature | Arize AI | OpenLIT |
|---|---|---|
| Best for | AI observability and evaluation, plus the open-source Phoenix | Open-source observability and evals for LLM apps and agents |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $50/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Arize AI | OpenLIT |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Arize AI starts at $50/mo and OpenLIT starts at See pricing page. Check both pricing pages for current plans.
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
2 plans
Open source
Free
- Self-hosted
- Tracing, evals and prompt management
- Apache 2.0
Enterprise
Contact sales
- Role-based access control
- Audit logs
- Alerts to Slack and PagerDuty
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
OpenLIT
- Free to self-host
- Built on OpenTelemetry
- Covers tracing, evals and prompts
- Hosted version is not yet available
- Enterprise features need a license
- Requires running your own infrastructure
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 OpenLIT if you want:
- Free to self-host
- Built on OpenTelemetry
- Covers tracing, evals and prompts
Watch out: hosted version is not yet available.
Arize AI vs OpenLIT FAQ
What is the difference between Arize AI and OpenLIT?
Arize AI: AI observability and evaluation, plus the open-source Phoenix. OpenLIT: Open-source observability and evals for LLM apps and agents. Both are models & apis tools.
Is Arize AI or OpenLIT cheaper?
Arize AI starts at $50/mo and OpenLIT starts at See pricing page. Check both pricing pages for current plans.
Do Arize AI and OpenLIT have free plans?
Arize AI: Yes. OpenLIT: Yes.
Who makes Arize AI?
Arize AI is made by Arize AI, based in United States.
Who makes OpenLIT?
OpenLIT is made by OpenLIT.
Which should I choose, Arize AI or OpenLIT?
Choose Arize AI if you value free open-source phoenix and covers classic ml and llms. Choose OpenLIT if you value free to self-host and built on opentelemetry.