Langfuse

Open-source LLM engineering platform for building, monitoring, and improving AI applications

About Langfuse

Langfuse is an open-source platform designed to help teams develop production-grade LLM applications. It provides observability, prompt management, evaluations, and analytics in a unified workflow. Trusted by Fortune 500 companies and processing billions of observations monthly, Langfuse supports any model, framework, or stack with 80+ integrations. Self-host for free under MIT license or use the cloud version.

Pricing

Full pricing page

Free option

Hobby

Custom

Get started, no credit card required. Great for hobby projects and POCs.

All platform features (with limits)
50k units / month included
30 days data access
2 users
Community support via GitHub

Core

$29 per month

For production projects. Longer data access and unlimited users.

Everything in Hobby
100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
90 days data access
Unlimited users
In-app support

Pro

$199 per month

For scaling projects. Unlimited history, high rate limits, all features.

Everything in Core
100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
3 years data access
Data retention management
Unlimited annotation queues
High rate limits
SOC2 & ISO27001 reports, BAA available (HIPAA)
Prioritized in-app support

Enterprise

$2,499 per month

For large scale teams. Enterprise-grade support and security.

Everything in Pro + Teams
100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
Audit Logs
SCIM API
Custom rate limits
Uptime SLA
Support SLA
Dedicated support engineer

FAQ

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Pricing summary

Free tier available

Starting from

$29/month

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