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Langfuse

Open-source LLM observability platform. Monitor and debug AI applications.

AI InfrastructureFounded January 2023#6 of 54 in AI Infrastructure

langfuse.comGitHubnpmPyPI
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Company research

Current company data

No company research card is published for Langfuse yet. The current company data below lists package, repository, and discussion metrics AI-Buzz can inspect today; AI-Buzz publishes a card when recent public metrics show a measured change with dated evidence and cited sources.

Package downloads (30d)

28.4M/30d

Dependent projects

713

dependents · latest

GitHub stars

31.0K

Hacker News

9/30d

Note: Public metrics are incomplete, and current data alone does not prove a trend; they do not show private usage, paid use, customer count, or product quality.

See latest dataHow we measure itAll research →

Company profile

What is Langfuse?

Langfuse provides observability for LLM applications. Track prompts, responses, and costs. Open-source alternative to proprietary tools.

Latest company data

Metric dates vary by source

Metric dates
npm downloads
PyPI downloads
npm dependents
PyPI dependents
GitHub stars
Hacker News mentions

Key metric

Package downloads (30d)

28.4M/30d

npm
6.2M
PyPI
22.2M

Tracked packages: npm langfuse; PyPI langfuse

▼ -3%

Additional metrics

3 metrics

Metric

Dependent projects

713

npm
175
PyPI
538

Projects depending on tracked packages: npm langfuse; PyPI langfuse

Metric

GitHub stars

31.0K

Main repository stars

Metric

Hacker News

9/30d

Position #21 in category discussion

Repository health

Maintenance data from the main open-source repository.

Key-person risk
4
External contributors
24
% of recent contributors outside the core team
Releases (30d)
0

Repository usage

Public repositories and source files importing packages tied to Langfuse.

Repos importing
40%

About Langfuse

Langfuse provides observability for LLM applications. Track prompts, responses, and costs. Open-source alternative to proprietary tools.

FoundersMax-Julian Scholtz, Lukas Müller
langfuse.comgithub.com/langfuse/langfusenpm: langfusePyPI: langfuse

Disclosed funding

Disclosed $5M · 2 rounds

Disclosed funding records total $5M. Category position #6 of 54 in AI Infrastructure.

Seed2023

Lightspeed Venture Partners

$4M
Seed2023

Y Combinator

$500K

Investors

Lightspeed Venture PartnersY Combinator

Tracked packages (2)

1 npm, 1 PyPI

langfuse

npmMain npm package

langfuse

Open-source LLM observability platform. Monitor and debug AI applications.

langfuse

PyPIMain PyPI package

langfuse

Open-source LLM observability platform. Monitor and debug AI applications.