Helicone vs Arize AI: Which is Better in 2026?
Choosing between Helicone and Arize AI comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Helicone
Build reliable AI apps with Helicone: AI Gateway & LLM Observability for debugging, routing, and analysis.
Best for you if:
- • You need API tools features specifically
- • Routes, debugs, and analyzes AI applications.
- • Offers LLM observability and an AI Gateway.
Arize AI
The AI & Agent Engineering Platform for LLM observability, evaluation, and development.
Best for you if:
- • You need AI agents features specifically
- • Unified platform for LLM observability, evaluation, and development.
- • Provides tools for prompt optimization, LLM-as-a-Judge, and real-time monitoring.
| At a Glance |  Helicone |  Arize AI |
|---|---|---|
Starts at | $100/monthPro | Free & open source/moPhoenix |
Best For | API Tools | AI Agents |
Rating | - | - |
Choose Helicone or Arize AI?
Choose Helicone if
Build reliable AI apps with Helicone: AI Gateway & LLM Observability for debugging, routing, and analysis.
- LLM observability
- Request logging
- Cost tracking
- Your work is API tools-shaped, not AI agents-shaped
Choose Arize AI if
The AI & Agent Engineering Platform for LLM observability, evaluation, and development.
- Provides a comprehensive, unified platform for the entire AI lifecycle from development to production.
- Offers advanced evaluation capabilities like LLM-as-a-Judge and human annotation for robust AI.
- Built on open standards and open-source components, promoting transparency and flexibility.
- Your work is AI agents-shaped, not API tools-shaped
| Feature | Helicone | Arize AI |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | No ratings yet | ★4.2/5 23 reviews |
| Categories | API ToolsDebugging | AI AgentsAI Observability |
In-Depth Analysis
Helicone
Build reliable AI apps with Helicone: AI Gateway & LLM Observability for debugging, routing, and analysis.
Strengths
- +LLM observability
- +Request logging
- +Cost tracking
- +Good for AI apps
- +Fair pricing
Weaknesses
- -Newer platform
- -Limited features
- -Still maturing
- -Integration effort
- -Documentation improving
Key features
Arize AI
The AI & Agent Engineering Platform for LLM observability, evaluation, and development.
Strengths
- +Provides a comprehensive, unified platform for the entire AI lifecycle from development to production.
- +Offers advanced evaluation capabilities like LLM-as-a-Judge and human annotation for robust AI.
- +Built on open standards and open-source components, promoting transparency and flexibility.
- +Includes an AI assistant (Alyx) to aid in debugging and accelerate development.
- +Scalable for enterprise use with features like custom data limits, SOC2, and HIPAA compliance.
Weaknesses
- -The complexity of features might have a learning curve for new users.
- -Pricing for higher tiers is custom, which may require direct engagement with sales.
- -Specific limitations on trace spans and ingestion volume for free and lower-paid tiers.
Key features
Pricing: Helicone vs Arize AI
| Plan | Helicone | Arize AI |
|---|---|---|
| Tier 1 | Free Free | Free & open source Phoenix |
| Tier 2 | $100 month Pro | Free AX Free |
| Tier 3 | custom Enterprise | $50 per month AX Pro |
| Tier 4 | N/A | Custom AX Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Helicone pricing and Arize AI pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Helicone
Want the highest-rated option?
Neither has user reviews yet.
Go with: Helicone
Value user reviews?
Neither has user reviews yet.
Go with: Helicone
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Helicone is a API tools tool. Arize AI is in AI agents. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Helicone
- Free tier available
- Our pick for this comparison
Arize AI
- Better fit for AI agents
The Bottom Line
Helicone is our pick.
Frequently Asked Questions
Is Helicone or Arize AI better?
Helicone is rated in our evaluation. Both are freemium.
What are Helicone and Arize AI used for?
Helicone: Build reliable AI apps with Helicone: AI Gateway & LLM Observability for debugging, routing, and analysis.. Arize AI: The AI & Agent Engineering Platform for LLM observability, evaluation, and development..
What does Helicone cost vs Arize AI?
Helicone is freemium (free tier + paid plans). Arize AI is freemium (free tier + paid plans). Visit their websites for detailed pricing.