Langfuse

Open-source LLM observability and evals — Hobby tier free, $29/mo Core, self-hostable

langfuse.com ↗

APIFree tier

Audited by Jack Phillips · Updated June 2026

Visit site

Overall score

2.8/ 5

SME fit2/5

tiered pricing with step cliff + free tier

JTBD4/5

solid named JTBD

Integration4/5

API + 8 integrations

Trust3/5

growing

Quality1/5

no public rating

Compliance3/5

GDPR

About

Langfuse is an open-source observability and evaluation platform for LLM applications — tracing, prompt management, datasets, and evals in one product. Strong default for teams already using LangGraph (built by overlapping ecosystem). Pricing is tier-based with a free Hobby tier for POCs, $29/mo Core for production, and Pro/Enterprise tiers that unlock SOC 2, HIPAA, and SLAs.

Best for: Teams building production LLM apps that want observability + evals + prompt management in one product. Pairs naturally with LangGraph users. Self-hosting is a real option — the OSS edition is fully featured.

Pricing

Hobby
Monthly
Free
Annual /mo
Free
Billing
flat
Notes
50K units/mo;30 days data access;2 users;Community support;No credit card required · Free forever. Great for POCs and side projects.
Core
Monthly
$29
Annual /mo
$29
Billing
flat
Notes
100K units/mo included;90 days data access;Unlimited users;In-app support;Volume discounts for startups and OSS · Best fit for most production apps that don't need SOC 2.
Pro
Monthly
$199
Annual /mo
$199
Billing
flat
Notes
100K units/mo included;3 years data access;Unlimited annotation queues;SOC 2 Type II + ISO 27001 reports;BAA available for HIPAA;Optional Teams add-on at $300/mo · Compliance gate — SOC 2 and HIPAA become available here.
Enterprise
Monthly
$2499
Annual /mo
$2499
Billing
flat
Notes
Everything in Pro plus Teams;Audit logs;SCIM API;Custom rate limits;SLAs;Dedicated support · $2,499/mo starting. Contact sales for custom commitments.

Tier	Monthly	Annual /mo	Billing	Notes
Hobby	Free	Free	flat	50K units/mo;30 days data access;2 users;Community support;No credit card required · Free forever. Great for POCs and side projects.
Core	$29	$29	flat	100K units/mo included;90 days data access;Unlimited users;In-app support;Volume discounts for startups and OSS · Best fit for most production apps that don't need SOC 2.
Pro	$199	$199	flat	100K units/mo included;3 years data access;Unlimited annotation queues;SOC 2 Type II + ISO 27001 reports;BAA available for HIPAA;Optional Teams add-on at $300/mo · Compliance gate — SOC 2 and HIPAA become available here.
Enterprise	$2499	$2499	flat	Everything in Pro plus Teams;Audit logs;SCIM API;Custom rate limits;SLAs;Dedicated support · $2,499/mo starting. Contact sales for custom commitments.