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See how reviewed tools stack up for your needs. Every value comes from a published JAVIS review.
| Feature / criteria |  LangfuseAI Data & Retrieval |  LlamaIndexAI Data & Retrieval |
|---|---|---|
| JAVIS Score | 76 / 100 | 87 / 100 |
| Price | $29/month | $50/mo |
| Pricing model | Freemium | Open source |
| Free tier | ✓ Yes | ✓ Yes |
| Open source | ✕ No | ✓ Yes |
| Our verdict | Open-source LLM tracing and evals that is far cheaper than per-trace rivals (Core $29 a month, unlimited users), now owned by ClickHouse, with a forced v4 cutover on Langfuse Cloud on Nov 16 2026 and retention rules only from Pro. | LlamaIndex didn't stay the librarian for your RAG stack. It became a document-parsing vendor with a free framework attached. |
| Last checked | Oct 28, 2026 | Oct 5, 2026 |
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