ROUTEDESK

LLM gateways, observability and what they really cost, with the source and author of every number

Langfuse vs LangSmith

Two products, four fee layers. The cheaper one depends on whether you buy credits or bring your own keys, and on how many logs you keep.

observability

Langfuse

Markup
n/a
Funding
n/a
Own keys
n/a
Free tier
Hobby: 50k units a month
Self-host
yes (MIT)

OFFICIAL VENDOR-WRITTEN 2026-11-10

observability

LangSmith

Markup
n/a
Funding
n/a
Own keys
n/a
Free tier
Developer: 1 seat, 5k base traces a month
Self-host
no

OFFICIAL VENDOR-WRITTEN 2026-11-10

Monthly bill, gateway credits

List-price spendLangfuseLangSmith
$100$29$567
$1,000$29$567
$10,000$29$567

Monthly bill, own keys

List-price spendLangfuseLangSmith
$100$29$567
$1,000$29$567
$10,000$29$567

100,000 logs a month, 3 seats, one request = one log. Use your numbers →