“LangSmith: primarily traces and seats.”
“Braintrust: processed data and evaluation scores.”
“Langfuse: units, combining traces, observations and scores.”
“Helicone | Requests + storage | $79/month Pro”
“Arize AX: spans and data ingestion.”
A question buyers ask AI
How does pricing work across LLM evaluation and monitoring platforms? And as our call volume grows, what usage dimensions usually end up driving the bill?
Measured in 1 answer, last on Nov 8, 2026. Only the passages that name a brand are shown.
Brands in the answers
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Where each answer names a brand
Sources the answers cite
arize.com1 answer