Arize AI vs OpenLLMetry: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Arize AI and OpenLLMetry side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Arize AI
The AI & Agent Engineering Platform for LLM observability, evaluation, and development.
Best for you if:
- • You want provides a comprehensive, unified platform for the entire AI lifecycle from development to production
OpenLLMetry
Open-source observability for LLMs using OpenTelemetry.
Best for you if:
- • You want leverages open standards (OpenTelemetry)
| At a Glance | Arize AI | OpenLLMetry |
|---|---|---|
Starts at | Free plan, paid from $50/mo, billed monthly AX Pro plan | Free plan |
Category | AI Observability AI Prompt Tools | Monitoring DevOps |
Rating | 4.3/5 G2 4.3 48 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | Self-hosting is an Enterprise add-on | No clear pricing for exceeding 50K spans/month on free tier. |
Choose Arize AI or OpenLLMetry?
Choose Arize AI if
- You want provides a comprehensive, unified platform for the entire AI lifecycle from development to production
- You want offers advanced evaluation capabilities like LLM-as-a-Judge and human annotation for robust AI
- You work in AI observability, not monitoring
Choose OpenLLMetry if
- You want leverages open standards (OpenTelemetry)
- You want easy integration with minimal code changes
- You work in monitoring, not AI observability
In-Depth Analysis
Arize AI
The AI & Agent Engineering Platform for LLM observability, evaluation, and development.
Arize AI offers a generous free tier (AX Free) and an open-source option (Phoenix), making it highly accessible for individual developers and small teams.
Watch out
Self-hosting is an Enterprise add-on
Strengths
- Pro: Provides a comprehensive, unified platform for the entire AI lifecycle from development to production.
- Pro: Offers advanced evaluation capabilities like LLM-as-a-Judge and human annotation for robust AI.
- Pro: Built on open standards and open-source components, promoting transparency and flexibility.
- Pro: Includes an AI assistant (Alyx) to aid in debugging and accelerate development.
- Pro: Scalable for enterprise use with features like custom data limits, SOC2, and HIPAA compliance.
Weaknesses
- Con: The complexity of features might have a learning curve for new users.
- Con: Pricing for higher tiers is custom, which may require direct engagement with sales.
- Con: Specific limitations on trace spans and ingestion volume for free and lower-paid tiers.
Key features
OpenLLMetry
Open-source observability for LLMs using OpenTelemetry.
OpenLLMetry offers a generous "Free Forever" tier with up to 50K spans/month, which is excellent for small projects and individual developers.
Watch out
No clear pricing for exceeding 50K spans/month on free tier.
Strengths
- Pro: Leverages open standards (OpenTelemetry)
- Pro: Easy integration with minimal code changes
- Pro: Supports both Python and TypeScript/Node.js
- Pro: Provides visibility into LLM application workflows
- Pro: Vendor-neutral for data export
Weaknesses
- Con: Requires an OpenTelemetry backend for full visualization
- Con: Limited information on advanced features or customization options from the provided content
Key features
Plans and prices: Arize AI vs OpenLLMetry
| Tool | Plans and prices | Source |
|---|---|---|
| Arize AI |
| arize.com/pricing read Oct 11, 2026 |
| OpenLLMetry |
| traceloop.com/pricing read Oct 2, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Arize AI pricing and OpenLLMetry pricing.
Key Takeaways
Arize AI
- Choose if you want the AI & Agent Engineering Platform for LLM observability, evaluation, and development
OpenLLMetry
- Choose if you want open-source observability for LLMs using OpenTelemetry
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Only Arize AI has a published user rating (4.3/5 from 48 reviews); OpenLLMetry has none we can show.
- Arize AI starts at $50/mo, billed monthly; OpenLLMetry has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Arize AI and OpenLLMetry compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Only Arize AI has a published user rating (4.3/5 from 48 reviews); OpenLLMetry has none we can show. Arize AI starts at $50/mo, billed monthly; OpenLLMetry has no public paid plan price on file. Both have a free plan.
What are Arize AI and OpenLLMetry used for?
Arize AI: The AI & Agent Engineering Platform for LLM observability, evaluation, and development. OpenLLMetry: Open-source observability for LLMs using OpenTelemetry.
What does Arize AI cost vs OpenLLMetry?
Arize AI's cheapest paid plan is AX Pro at $50/mo, billed monthly; it also has a free plan. OpenLLMetry has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Oct 11, 2026.
What's the main difference between Arize AI and OpenLLMetry?
Arize AI's main strength: provides a comprehensive, unified platform for the entire AI lifecycle from development to production. OpenLLMetry's main strength: leverages open standards (OpenTelemetry).