Who Perplexity recommends for LLM observability and evaluation tools.
Updated 9 October 202615 Perplexity answers
We asked Perplexity 5 buyer prompts 3 times each on 9 October 2026, with live web search on, and counted every product its 15 usable answers named. This page is Perplexity alone; the full ranking compares every engine and quotes every answer.
Who Perplexity recommends.
| # | Product | Share of answers | Avg. position |
|---|---|---|---|
| 1 | Langfuselangfuse.com | 100% 15 of 15 answers | |
| 2 | Arize Phoenixphoenix.arize.com | 100% 15 of 15 answers | |
| 3 | Braintrustbraintrust.dev | 80% 12 of 15 answers | |
| 4 | LangSmithsmith.langchain.com | 67% 10 of 15 answers | |
| 5 | Heliconehelicone.ai | 67% 10 of 15 answers | |
| 6 | OpenObserveopenobserve.ai | 20% 3 of 15 answers | |
| 7 | OpenLITopenlit.io | 20% 3 of 15 answers | |
| 8 | DeepEvaldeepeval.com | 20% 3 of 15 answers | |
| 9 | HoneyHivehoneyhive.ai | 20% 3 of 15 answers | |
| 10 | Pydantic Logfirelogfire.pydantic.dev | 20% 3 of 15 answers | |
| 11 | Maxim AIgetmaxim.ai | 20% 3 of 15 answers | |
| 12 | W&B Weavewandb.ai | 20% 3 of 15 answers | |
| 12 | AgentOpsagentops.ai | 20% 3 of 15 answers | |
| 14 | Arize AIarize.com | 13% 2 of 15 answers | |
| 15 | Datadogdatadoghq.com | 13% 2 of 15 answers | |
| 16 | Galileogalileo.ai | 13% 2 of 15 answers | |
| 17 | OpenLLMetrytraceloop.com | 13% 2 of 15 answers | |
| 18 | Patronus AIpatronus.ai | 13% 2 of 15 answers | |
| 19 | Humanloophumanloop.com | 7% 1 of 15 answers | |
| 20 | Confident AIconfident-ai.com | 7% 1 of 15 answers | |
| 20 | Lunarylunary.ai | 7% 1 of 15 answers | |
| 22 | New Relic AI Monitoringnewrelic.com | 7% 1 of 15 answers | |
| 23 | OpenLayeropenlayer.com | 7% 1 of 15 answers |
What this does and does not show.
- Counted from Perplexity’s 15 usable answers of 15 planned.
- Products level on share of answers and average position share a rank: the measurement shows no difference between them.
- Counted as one product under reviewed spellings: “Arize AX” as Arize AI; “Datadog LLM Observability” as Datadog; “OpenLLMetry (Traceloop)” as OpenLLMetry; “Weights & Biases Weave” as W&B Weave.
- AI answers vary from run to run and with each person’s history and settings. This is what Perplexity answered on 9 October 2026, asked fresh each time, not what every user will see.
- One engine and one month. Another engine, or next month, can name different products.
Not affiliated with or endorsed by Perplexity.How it works · Every engine for LLM observability and evaluation tools · According to ChatGPT · According to Claude