Arize Phoenix vs Opik
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Arize Phoenix
Free, self-hosted LLM tracing and evaluation
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Opik
Open-source LLM and agent tracing, evals and optimisation you can self...
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| RECATOOLS Score | 7.8 / 10 | 7.8 / 10 |
| Capability | ||
| Value for money | ||
| Ease of use | ||
| ASEAN readiness | ||
| API quality | ||
| Pricing | Free | Open Source |
| Free tier | 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 | Apache-2.0 self-hosted version free with no span cap; Free Cloud $0: up to 10 members, 25k spans a month, 60-day retention |
| Paid from | Phoenix is free. Arize's managed AX Pro plan is $50/month | Pro Cloud $19/mo (100k spans, +$5 per extra 100k); Enterprise custom |
| Has API | ✓ | ✓ |
| Open source | ✓ | ✓ |
| Free to use | ✓ | ✓ |
| Users | — | — |
| Founded | 2023 | 2024 |
| Maker | Arize AI | Comet ML |
| Verdict | 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... |
Opik is one of the strongest open-source options for observing and evaluating LLM and agent applications: tracing, judge-based and heuristic evaluation, test suites, a playground and several prompt optimisers, under Apac... |
| Full review → | Directory listing → |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.