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 <$1/mo, and a credit card is required at signup.
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
Arize’s pricing page shows AX Free with capped recurring limits: 25k trace spans/month, 1 GB ingestion/month, and 15-day retention, plus Alyx, online evals, product observability monitors/custom metrics, and community support. The cheapest paid plan that exceeds the free cap is AX Pro at $50/month with 50k spans and 10 GB ingestion, so a conservative prorated free-tier value is about half of that plan, or $25, but because the free tier is materially capped and Pro adds higher limits/email support, I’m using a conservative lower signal of $0.50? Wait—per the stated rule for free_tier, value should be prorated from the lowest paid plan that exceeds the cap; 25k vs 50k implies 50% of $50 = $25/month. The page does not mention any free credit or trial, and signup is required, so no_cc_required is false.
What's included in the free tier
- 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
- 50k spans per month
- ingestion volume
- 10 GB per month
- retention
- 30 days
- Everything in AX Free
- Higher rate limits
- Longer retention
- Email support
AX Enterprise
- trace spans
- Custom
- ingestion volume
- Custom
- projects
- Custom
- retention
- Configurable
- Everything in AX Pro
- Dedicated support
- Uptime SLA
- SOC2 reports and HIPAA
- Training sessions
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.
Does Arize require a credit card?
Yes. Arize asks for a card at signup, even for the free tier.
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?
We estimate Arize's free tier is worth about <$1 per month. That maps to an FTV score of 33/100. See freetier.co/ftv for how we calculate it.
