Free Arize Phoenix Alternatives (2026)
Arize Phoenix has a free plan: Open-source and free cloud tier (checked ); paid plans start at $50 a month. The top free Arize Phoenix alternatives we've verified are Langfuse (free plan), Braintrust (free plan) and Helicone (free plan), all checked . All 4 picks below are free for at least a week. Arize Phoenix — Open-source LLM tracing and evaluation. Below are eligible free alternatives among LLM observability and eval platforms.
4 free alternatives
Each with what's free and when we checked
Evals and observability platform for AI products. Best for AI engineers. Key features: Tracing; Evals; Playgrounds.
Free forever, Free plan for evals and logging
Free accountTry
- Kind of free
- Free plan
- Checked
- 2026-11-12
- What's free
- Free Hobby plan; open source self-host
- Kind of free
- Free plan
- Checked
- 2026-11-12
- What's free
- Free plan for evals and logging
- Kind of free
- Free plan
- Checked
- 2026-11-12
- What's free
- Monthly requests
- Kind of free
- Free plan
- Checked
- 2026-11-12
- What's free
- Free Developer plan: 5k traces per month
Is Arize Phoenix free?
Arize Phoenix — Free plan: Open-source and free cloud tier. Verified on 2026-11-12.
FAQ
- Which free Arize Phoenix alternatives are free forever?
- All 4 here have a free plan with no end date: Langfuse, Braintrust, Helicone and 1 more. Each listing shows its free limits and the day we checked them.
- How do you check these free plans?
- We read each maker's own pricing page and note the day we checked; the newest check on this page is 12 Nov 2026. Rank follows our published rules: paid placements are always labelled, and payment can't buy rank.
