Yes, Arize has a permanent free tier alongside its paid plans. The free plan includes Trace spans: 25k spans per month, Ingestion volume: 1 GB per month, and Retention: 15 days. FreeTier.co estimates the free tier at about $25/mo.
About
Arize is an AI and agent engineering platform that combines observability, tracing, evaluation, prompt management, and monitoring for production AI systems. The product includes Arize AX for generative AI and ML/CV observability, plus Phoenix OSS for self-hosted open source tracing and evaluation workflows.
The platform supports trace spans, multi-agent graphs, session support, token and cost tracking, custom metrics, dashboards, offline and online evaluations, prompt replay, and OpenTelemetry-based instrumentation. The pricing page lists a free SaaS plan with 25k trace spans per month, 1 GB ingestion per month, and 15 days of retention, alongside a separate self-hosted open source option with user-managed limits.
- 25k trace spans per month
- 1 GB ingestion per month
- 15 days retention
- Offline and online evaluations
- Prompt management and replay
- OpenTelemetry instrumentation
- Multi-agent tracing graphs
- Self-hosted Phoenix OSS option
Free Tier Value
This free tier is a capped but genuinely usable starter plan: it includes 25k spans, 1 GB of ingestion, 15 days of retention, and unlimited users and evals. Compared with the $50/month Pro plan, it delivers roughly half the core capacity, so a fair buyer-style estimate is about $25/month; the offer is perpetual, but a credit card is required to get started.
What's included in the free tier
Verified
- Trace spans: 25k spans per month.
- Ingestion volume: 1 GB per month.
- Retention: 15 days.
- Alyx (Arize agent) included.
- Online evals included.
- Product observability monitors and custom metrics included.
- Community support included.
See Arize pricing for current limits.
Paid plans
AX Pro
- trace spans per month
- 50k
- ingestion volume per month
- 10 GB
- retention
- 30 days
- users
- Unlimited
- evals
- Unlimited
- deployment
- SaaS
- Trace spans 50k spans per month
- Ingestion volume 10 GB per month
- Retention 30 days
- Deployment SaaS
- Users Unlimited
- Evals Unlimited
AX Enterprise
- trace spans
- Custom
- ingestion volume
- Custom
- retention
- Custom
- deployment
- SaaS or Self-Hosted
- users
- Unlimited
- evals
- Unlimited
- Trace spans Custom
- Ingestion Volume Custom
- Retention Custom
- Deployment SaaS or Self-Hosted
- Users Unlimited
- Evals Unlimited
Pricing extracted from Arize's pricing page. Always verify current pricing before committing.
Common questions
Is Arize free forever?
Yes. Arize has a permanent free tier alongside its paid plans, though the allowance typically resets each month.
What happens when you exceed Arize's free tier?
You move to a paid plan. Arize's cheapest paid plan is AX Pro at $50 / month.
What is Arize's free tier worth?
Arize's free tier is worth about $25 per month. That maps to an FTV score of 57/100. The FTV score is explained at freetier.co/ftv.
