A question buyers ask AI

How much do LLM observability and evaluation platforms typically cost per month for a team running a few million model calls?

Measured in 1 answer, last on Nov 8, 2026. Only the passages that name a brand are shown.

Brands in the answers

Brand	Named in	Recommended in	Positive	Avg. position
LangSmith	100%	0%	0%	—
Braintrust	100%	0%	0%	—
Langfuse	100%	0%	0%	—
Arize Phoenix	100%	0%	0%	—
Helicone	100%	0%	0%	—
Comet Opik	100%	0%	0%	—
Arize AX	100%	0%	0%	—
Confident AI	100%	0%	0%	—

Answer 1 · Nov 8, 2026

“LangSmith | $39/seat/mo | Per base trace”

− high estimated production cost

“LangSmith | $15,000+”

“Braintrust | $249/mo | Data ingestion + eval scores”

“Langfuse | $29/mo | Per 100k trace units”

+ low starting price

“Langfuse | $29/mo | Per 100k trace units”

+ low estimated production cost

“Langfuse Cloud | $450–$900”

“Self-hosted Phoenix | $400–$1,000 infrastructure”

“Helicone | $79/mo | Requests + usage”

“Arize AX | $50/mo | Spans + ingestion”

“Confident AI | $200/mo | Storage consumption”