LLM Observability — Pricing & Quality Intelligence
Consumption-level pricing for every major llm observability vendor, extracted weekly from public pricing pages, logged with a SHA-256 hash, and archived into a running history. Cells show the latest verified observation; “—” means the ledger is still arming for that vendor.
| Vendor | Headline price | Output $/1M | Context | BizOps Score | |
|---|---|---|---|---|---|
| Arize Phoenix OSS | $50 /seat | — | — | — | Deploy → |
| Braintrust SaaS | $4 /GB-mo | — | — | — | Site → |
| Helicone OSS | — | — | — | 37 | Deploy → |
| Langfuse OSS | — | — | — | 58 | Deploy → |
| PromptLayer SaaS | $1.25 /1M in | $10 | — | — | Site → |
| W&B Weave SaaS | $0.03 /GB-mo | — | — | — | Site → |
/api/notary/verify?slug=<vendor>.Head-to-head comparisons
Arize Phoenix vs Braintrust · Arize Phoenix vs Helicone · Arize Phoenix vs Langfuse · Arize Phoenix vs PromptLayer · Arize Phoenix vs W&B Weave · Braintrust vs Helicone · Braintrust vs Langfuse · Braintrust vs PromptLayer · Braintrust vs W&B Weave · Helicone vs Langfuse · Helicone vs PromptLayer · Helicone vs W&B Weave · Langfuse vs PromptLayer · Langfuse vs W&B Weave · PromptLayer vs W&B Weave
Heads up: some links on this page earn us a referral commission if you sign up — vendors can't pay to change their score or their spot in the ledger though. See how we score →