OpenLLMetry vs Arize Phoenix
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
OpenLLMetry
Open-source OpenTelemetry tracing for LLM apps
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Arize Phoenix
Free, self-hosted LLM tracing and evaluation
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| RECATOOLS Score | 7 / 10 | 7.8 / 10 |
| Capability | ||
| Value for money | ||
| Ease of use | ||
| ASEAN readiness | ||
| API quality | ||
| Pricing | Open Source | Free |
| Free tier | OpenLLMetry is free and open source (Apache-2.0); Traceloop's hosted free tier covers up to 50K spans a month with 24-hour retention | Self-host Phoenix free: no licence fees, usage limits or feature gates. Arize AX Free cloud tier: 25k spans, 1 GB ingest a month, 15-day retention |
| Paid from | — | Phoenix is free. Arize's managed AX Pro plan is $50/month |
| Has API | ✓ | ✓ |
| Open source | ✓ | ✓ |
| Free to use | ✓ | ✓ |
| Users | — | — |
| Founded | 2023 | 2023 |
| Maker | ServiceNow | Arize AI |
| Verdict | OpenLLMetry is the sensible default if you already run OpenTelemetry: a pip install and one init line, and your LLM calls show up as standard spans in the backend you already use. Coverage of providers, vector databases... |
Arize Phoenix is one of the most complete no-cost options for finding out why an agent or RAG pipeline behaved as it did: OpenTelemetry tracing, evals, datasets, experiments and a prompt playground, self-hosted with no f... |
| Full review → | Full review → |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.