Langfuse
Data confidence: HighOpen-source LLM observability platform. Monitor and debug AI applications.
Founded by: Max-Julian Scholtz, Lukas Müller
Langfuse has a Developer Momentum Index of 19, ranking #32 of 262 companies. Key metrics include 16.6M monthly package downloads, 22.7K GitHub stars, $5M in total funding.
Developer Adoption
Developer Adoption
Package downloads and ecosystem metrics, 30-day window
Active Contributors Trend
github contributors remained stable at 28 over the last 90 days.
View data table
| Date | github contributors |
|---|---|
| Mar 5, 2026 | 28 |
| Mar 6, 2026 | 28 |
npm Dependents Trend
Trend data not yet available
Check back soon as we collect more data.
npm Download Trend
npm Downloads remained stable at 3,290,077 over the last 90 days.
View data table
| Date | npm downloads |
|---|---|
| Mar 5, 2026 | 3,290,077 |
| Mar 6, 2026 | 3,290,077 |
PyPI Download Trend
PyPI Downloads grew from 13,192,443 to 13,354,793 (+1.2%) over the last 90 days.
View data table
| Date | pypi downloads |
|---|---|
| Mar 5, 2026 | 13,192,443 |
| Mar 6, 2026 | 13,354,793 |
Key Signals
Developer Community Metrics
Metrics computed from HN discussion, GitHub activity, and funding data.
Category Benchmark
75 AI Infrastructure companies30-Day Trends
npm Downloads
npm Downloads remained stable at 3,290,077 over the last 90 days.
View data table
| Date | npm downloads |
|---|---|
| Mar 5, 2026 | 3,290,077 |
| Mar 6, 2026 | 3,290,077 |
PyPI Downloads
PyPI Downloads grew from 13,192,443 to 13,354,793 (+1.2%) over the last 90 days.
View data table
| Date | pypi downloads |
|---|---|
| Mar 5, 2026 | 13,192,443 |
| Mar 6, 2026 | 13,354,793 |
GitHub Stars
GitHub Stars grew from 21,670 to 22,739 (+4.9%) over the last 90 days.
View data table
| Date | github stars |
|---|---|
| Feb 2, 2026 | 21,670 |
| Feb 7, 2026 | 21,910 |
| Feb 8, 2026 | 21,935 |
| Feb 9, 2026 | 21,954 |
| Feb 10, 2026 | 21,986 |
| Feb 12, 2026 | 22,068 |
| Feb 13, 2026 | 22,081 |
| Feb 14, 2026 | 22,122 |
| Feb 15, 2026 | 22,141 |
| Feb 16, 2026 | 22,164 |
| Feb 17, 2026 | 22,195 |
| Feb 19, 2026 | 22,291 |
| Feb 21, 2026 | 22,440 |
| Feb 22, 2026 | 22,467 |
| Feb 23, 2026 | 22,507 |
| Feb 24, 2026 | 22,532 |
| Feb 25, 2026 | 22,587 |
| Feb 26, 2026 | 22,663 |
| Feb 27, 2026 | 22,733 |
| Feb 28, 2026 | 22,739 |
HN Mentions
HN Mentions declined from 44 to 23 (-47.7%) over the last 90 days.
View data table
| Date | hn mentions |
|---|---|
| Jan 6, 2026 | 44 |
| Jan 9, 2026 | 44 |
| Jan 10, 2026 | 41 |
| Jan 15, 2026 | 41 |
| Jan 16, 2026 | 39 |
| Jan 17, 2026 | 36 |
| Jan 18, 2026 | 10 |
| Jan 20, 2026 | 10 |
| Jan 21, 2026 | 10 |
| Jan 22, 2026 | 11 |
| Jan 23, 2026 | 11 |
| Jan 24, 2026 | 11 |
| Jan 25, 2026 | 12 |
| Jan 27, 2026 | 13 |
| Jan 29, 2026 | 11 |
| Jan 30, 2026 | 12 |
| Jan 31, 2026 | 12 |
| Feb 1, 2026 | 14 |
| Feb 2, 2026 | 17 |
| Feb 3, 2026 | 23 |
| Feb 4, 2026 | 23 |
| Feb 5, 2026 | 23 |
Funding Rounds
2024 · Burda Principal Investments
2024 · Lightspeed Venture Partners
2023 · Y Combinator
According to AI-Buzz, Langfuse has 3,290,077 npm downloads in 30 days, with 13,354,793 PyPI downloads in 30 days, with 28 active contributors in 30 days, with 72 npm dependent packages, ranks #16 in AI Infrastructure for HN discussion share (out of 75 tracked with 1.4% of HN discussion), with 0% positive developer sentiment (23 HN comments analyzed), with 41 commits/week (declining).
Source: https://www.ai-buzz.com/companies/langfuse?utm_source=citation&utm_medium=referral&utm_campaign=cite_this_data
Metrics derived from public APIs (HN Algolia, GitHub, npm/PyPI). Sentiment classified by AI. See methodology for details →
About
About
Description
Open-source LLM observability platform. Monitor and debug AI applications.
Estimated Company Size
1 - 10 employees
Website
langfuse.comDetails
Founded
2023
Description
Langfuse provides observability for LLM applications. Track prompts, responses, and costs. Open-source alternative to proprietary tools.
Products & Tools
Langfuse Platform
Open-source platform for monitoring, debugging, and evaluating LLM applications.
Data Confidence
ExcellentReflects profile completeness, metric freshness, and signal coverage.
How we calculate thisEmbed Badge
Weekly AI Intelligence
Which AI companies are developers actually adopting? We track npm and PyPI downloads for 262+ companies. Get the biggest shifts weekly - before they show up in the news.