Arize Phoenix Pricing 2026
Complete pricing guide with plans, and cost analysis
Arize Phoenix has a free plan. Paid plans start at $50/month (AX Pro) and go up to $1000/month.
Arize Phoenix costs Free to $1K per month as of April 2026, with 4 plans available including a free tier. Plans: Phoenix (Open Source) (free), AX Free (free), and AX Pro at $50/month. Enterprise pricing is available on request. Pricing depends on your chosen tier, contract length, and negotiated discounts.
Use the interactive pricing calculator to estimate your exact cost based on team size and requirements.
- Free tier: Yes
Arize Phoenix offers 4 pricing tiers: Phoenix (Open Source), AX Free, AX Pro, AX Enterprise. A free plan is available. Paid plans include AX Pro at $50/month. The AX Free plan is individual developers evaluating ax cloud.
Compared to other ai observability & evals software, Arize Phoenix is positioned at the mid-market price point.
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How much does Arize Phoenix cost?
Arize Phoenix Pricing Overview
Arize Phoenix has 4 pricing plans, including a free tier. Paid plans range from $0 to $1,000/month. The Phoenix (Open Source) plan is free and is best for teams wanting self-hosted observability. The AX Free plan is free and is best for individual developers evaluating ax cloud. The AX Pro plan costs $50/month, best for small teams running production llm apps. The AX Enterprise plan requires contacting sales for a custom quote and is designed for enterprises with compliance and scale needs.
This pricing was last verified in April 23, 2026.
Arize Phoenix pricing starts at $0 with two free options: the self-hosted open-source Phoenix (Open Source) plan and the cloud-hosted AX Free tier. For teams that prefer managed infrastructure, the AX Pro plan runs $50/month. Larger organizations with advanced security, SLA, or scale requirements can contact Arize for custom AX Enterprise pricing.
How Arize Phoenix Pricing Compares
Compare Arize Phoenix pricing against top alternatives in AI Observability & Evals.
All Arize Phoenix Plans & Pricing
| Plan | Monthly | Annual | Best For |
|---|---|---|---|
| Phoenix (Open Source) | Free | Free | Teams wanting self-hosted observability |
| AX Free | Free | Free | Individual developers evaluating AX Cloud |
| AX Pro | $50 /month | $50 /year | Small teams running production LLM apps |
| AX Enterprise | Contact Sales | Contact Sales | Enterprises with compliance and scale needs |
View all features by plan
Phoenix (Open Source)
- Fully self-hosted
- User-managed retention
- All core tracing and eval features
- Optional paid support add-on
AX Free
- 25k spans/month
- 1 GB ingestion/month
- 15-day retention
- Alyx agent
- Online evals
- Community support
AX Pro
- 50k spans/month included
- 10 GB ingestion/month
- 30-day retention
- Email support
- Startup pricing available
AX Enterprise
- Custom span/ingestion limits
- Configurable retention
- Dedicated support
- Uptime SLA
- SOC2/HIPAA
- SaaS or self-hosted
- Multi-region data residency
Usage-Based Rates
Per-unit pricing for Arize Phoenix API usage.
AX Pro
| Item | Dimension | Unit | Rate |
|---|---|---|---|
| span | request | 1M spans | $10.00 |
| ingestion | storage | GB | $3.00 |
Compare Arize Phoenix vs Alternatives
Before committing to Arize Phoenix, compare pricing with these 3 alternatives in the same category.
What Companies Actually Pay for Arize Phoenix
Arize Phoenix Year 1 Total Cost by Company Size
Real deployment costs including licenses, implementation, training, and admin — not just the sticker price.
Individual developer running Phoenix locally for LLM tracing and evaluation, no cloud costs.
Team using the Arize-hosted AX Pro plan for LLM observability without managing infrastructure.
Larger organization requiring custom capacity, SLAs, or enterprise security features.
Solo developer running Arize Phoenix open source locally or on personal infrastructure for LLM tracing and evaluation with no hosting costs.
Small team using the hosted AX Free tier for LLM observability without managing infrastructure.
Team requiring managed hosted infrastructure with expanded capabilities beyond the AX Free tier limits.
Current tier data
How Arize Phoenix Pricing Compares
| Software | Starting Price | Top Price |
|---|---|---|
| Arize Phoenix | Free | $1000/month |
| Braintrust | Free | $1000/month |
| Helicone | Free | $2000/month |
| Humanloop | Custom | Custom |
| Langfuse | Free | $2499/month |
| LangSmith | Free | $500/seat/month + per trace |
Detailed pricing comparisons:
Arize Phoenix Pricing FAQ
01 Does Arize Phoenix have a free plan?
Yes. Arize Phoenix offers two free entry points: the Phoenix (Open Source) plan at $0 for self-hosting, and the AX Free hosted tier also at $0. A Reddit discussion in the LLM tooling community confirms that Arize offers a free tier alongside its paid options.
02 What does Arize Phoenix cost for a team?
For teams using the hosted platform, the AX Pro plan costs $50/month. Enterprise teams with larger-scale requirements receive custom pricing under the AX Enterprise plan.
03 How does Arize Phoenix compare to LangSmith or LangFuse on price?
One Reddit commenter noted that LangSmith and LangFuse both offer free tiers with paid tiers running $40–$100/month, while Arize's pricing beyond its free tier 'isn't fixed' — suggesting enterprise pricing is custom-quoted rather than published. Arize Phoenix's AX Pro plan is $50/month for hosted access.
04 Is Arize Phoenix a good fit for LlamaIndex projects?
Yes. A Reddit commenter described Arize Phoenix as an alternative to LangSmith specifically for teams already in the LlamaIndex ecosystem, noting its workflows are similar to LangGraph.
Is this pricing incorrect? — we'll verify and update it.