LLM Observability & Evals Pricing Comparison

	A	B	C	D	E	F	G	H	I	J	L	M
1	LLM observability pricing comparison
2	Pricing checked	2026-08-19
3	Assumption	Value	Unit
4	Monthly traces	500,000	traces / mo
5	Spans per trace	10.0	spans / trace
6	Event size	5.0	KB / span
7	Scores per trace	1.0	scores / trace
8	Trace Retention	12	months
9	Users in your team	5	users
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11	Derived volume	Value	Unit
12	Monthly spans	5,000,000	spans / mo
13	Monthly scores	500,000	scores / mo
14	Processed data	25.00	GB / mo
15	Langfuse units	6,000,000	units / mo
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17	NOT INCLUDED / LIMITED: Braintrust Topics/model credits; LangSmith Engine/LCUs; Arize AX Pro extended retention (price not public); Datadog retention beyond 90 days (unavailable).
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19	Vendor	Plan	Status	Base / mo	Seats / mo	Usage / mo	Retention / mo		Known total / mo	Known $ / 1M spans
20	Langfuse	Pro	OK	$199.00	$0.00	$422.00	$0.00		$621.00	$124.20
21	Braintrust	Pro	OK	$249.00	$0.00	$735.00	$137.68		$1,121.68	$224.34
22	LangSmith	Plus	OK	$0.00	$195.00	$2,450.00	$1,250.00		$3,895.00	$779.00
23	Arize AX	Pro	OK	$50.00	$0.00	$4,005.00	Price not publicly listed		$4,055.00	$811.00
24	Datadog	Pro	Retention exceeds plan	$160.00	$0.00	$1,715.00	Not available (90-day max)		$1,875.00	$375.00
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26	Selected-plan feature access										Legend
27	Vendor	Plan	BAA	DPA	SOC 2	ISO 27001	Audit logs	SCIM	Custom SSO	S3 export	✓	Included
28	Langfuse	Pro	✓	✓	✓	✓	Sales	Sales	Self-serve	Self-serve	Self-serve	Paid upgrade / add-on
29	Braintrust	Pro	Sales	✓	Sales	—	Sales	Sales	Sales	Sales	Sales	Enterprise / contact sales
30	LangSmith	Plus	Sales	✓	✓	Sales	Sales	Sales	Sales	✓	—	Not publicly listed
31	Arize AX	Pro	—	✓	✓	Sales	—	—	—	—
32	Datadog	Pro	Sales	✓	✓	✓	Sales	Sales	Sales	Self-serve
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34	For feedback / comments, please email hande@langfuse.com
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