https://github.com/langfuse/langfuse-js

javascript langfuse llmops observability sdk-js typescript

Score: 27.004325858574973

Last synced: 1 day ago
JSON representation

Repository metadata:

🪢 Langfuse JS/TS SDK

Host: GitHub
URL: https://github.com/langfuse/langfuse-js
Owner: langfuse
License: mit
Created: 2023-07-02T21:43:44.000Z (over 3 years ago)
Default Branch: main
Last Pushed: 2026-10-29T07:19:27.000Z (5 days ago)
Last Synced: 2026-10-29T08:32:10.586Z (5 days ago)
Topics: javascript, langfuse, llmops, observability, sdk-js, typescript
Language: TypeScript
Homepage: https://langfuse.com/docs/observability/sdk/overview
Size: 5.81 MB
Stars: 175
Watchers: 2
Forks: 118
Open Issues: 52
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Codeowners: .github/CODEOWNERS
- Agents: AGENTS.md

Owner metadata:

Name: Langfuse
Login: langfuse
Email: hi@langfuse.com
Kind: organization
Description: Open source LLM engineering platform. Debug, analyze and iterate together.
Website: https://langfuse.com
Location:
Twitter: langfuse
Company:
Icon url: https://avatars.githubusercontent.com/u/134601687?v=4
Repositories: 11
Last Synced at: 2024-04-14T18:59:34.503Z
Profile URL: https://github.com/langfuse

GitHub Events

Total

Create event: 249
Delete event: 226
Fork event: 34
Issue comment event: 337
Issues event: 14
Member event: 1
Pull request event: 391
Pull request review comment event: 194
Pull request review event: 415
Push event: 680
Release event: 40
Watch event: 48
Total: 2629

Last Year

Create event: 65
Delete event: 83
Fork event: 4
Issue comment event: 51
Issues event: 10
Member event: 1
Pull request event: 53
Pull request review comment event: 6
Pull request review event: 30
Push event: 196
Release event: 7
Watch event: 14
Total: 520

Committers metadata

Last synced: 2 days ago

Total Commits: 922
Total Committers: 35
Avg Commits per committer: 26.343
Development Distribution Score (DDS): 0.695

Commits in past year: 274
Committers in past year: 22
Avg Commits per committer in past year: 12.455
Development Distribution Score (DDS) in past year: 0.701

Name	Email	Commits
Hassieb Pakzad	6****p	281
dependabot[bot]	4****]	163
Marc Klingen	g**t@m**m	159
Max Deichmann	m**n@t**e	124
langfuse-bot	a**t@l**m	59
langfuse-bot	l**t@l**m	54
Tobias Wochinger	t**r@c**m	18
marliessophie	7****e	8
Nimar	l**b@g**m	8
Niklas Semmler	1****r	8
Jannik Maierhöfer	4****r	4
Johannes Goslar	j**o@k**e	4
Milana Gurbanova	1****m	3
Richard Krümmel	6****l	3
Budde Christensen	b**7@g**m	2
David Alexander Pfeiffer	2****1	2
David Traina	d**5@g**m	2
gitstart-app[bot]	5****]	2
tobi_kl	t**l@c**m	2
szedelenyi	1****i	1
hassiebbot	2****t	1
Valery Meleshkin	v**y@l**m	1
Tanmay Sharma	t**2@o**m	1
Taiichiro Nagase	t**e@s**m	1
Serhii Shchoholiev	9****v	1
Nishant Kyal	1****l	1
Nico Hagelberg	1****u	1
Matt Peck	m**t@m**m	1
Lee	4****w	1
Howie Benefiel	5****r	1
and 5 more...

Issue and Pull Request metadata

Last synced: 3 days ago

Total issues: 35
Total pull requests: 1,489
Average time to close issues: 20 days
Average time to close pull requests: 11 days
Total issue authors: 26
Total pull request authors: 94
Average comments per issue: 1.31
Average comments per pull request: 1.43
Merged pull request: 789
Bot issues: 4
Bot pull requests: 690

Past year issues: 18
Past year pull requests: 360
Past year average time to close issues: 26 days
Past year average time to close pull requests: 5 days
Past year issue authors: 16
Past year pull request authors: 58
Past year average comments per issue: 1.67
Past year average comments per pull request: 2.11
Past year merged pull request: 202
Past year bot issues: 0
Past year bot pull requests: 53

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/langfuse/langfuse-js

Top Issue Authors

marcklingen (4)
dependabot[bot] (4)
chagasjoao (2)
markwitt1 (2)
junuMoon (2)
moko-poi (1)
don-devo (1)
devonkcopeland (1)
RingoDev (1)
arnd-dexmind (1)
chidam333 (1)
guillaume86 (1)
maxdeichmann (1)
fallaciousreasoning (1)
surapuramakhil (1)

Top Pull Request Authors

dependabot[bot] (686)
hassiebp (230)
langfuse-bot (167)
maxdeichmann (109)
marcklingen (85)
wochinge (17)
nimarb (13)
marliessophie (11)
niklassemmler (11)
jannikmaierhoefer (9)
RichardKruemmel (8)
selbyk (6)
ksjogo (6)
gitstart-app[bot] (4)
i-anubhav-anand (4)

Top Issue Labels

bug (13)
sdk-js (11)
integration-otel (7)
dependencies (4)
feat-otel (4)
integration-langchain (4)
enhancement (4)
Migrated (3)
integration-vercel-ai-sdk (2)
feat-playground (2)
feat-tracing (2)
billing (1)
feat-multimodal (1)
release-notes/exclude (1)
feat-core (1)
good first issue (1)
QA/No (1)
feature/brave-news (1)
docs (1)
feat-ingestion (1)
OS/Desktop (1)

Top Pull Request Labels

dependencies (686)
javascript (163)
github_actions (27)
enhancement (1)
bug (1)

Package metadata

Total packages: 16
Total downloads:
- npm: 61,654,315 last-month
Total docker downloads: 5,602,385
Total dependent packages: 8 (may contain duplicates)
Total dependent repositories: 23 (may contain duplicates)
Total versions: 1,671
Total maintainers: 4

npmjs.org: langfuse-langchain

LEGACY Langfuse v3 integration for LangChain (maintenance mode). For new projects use the current CallbackHandler from @langfuse/langchain: npm install @langfuse/langchain @langfuse/otel

Homepage: https://langfuse.com/docs/observability/sdk/overview
Licenses: MIT
Latest release: 3.39.2 (published about 2 months ago)
Last Synced: 2026-10-31T17:05:05.885Z (2 days ago)
Versions: 194
Dependent Packages: 4
Dependent Repositories: 19
Downloads: 852,507 Last month
Docker Downloads: 556,573
Rankings:
- Docker downloads count: 0.727%
- Downloads: 1.431%
- Average: 2.366%
- Dependent repos count: 2.795%
- Dependent packages count: 4.511%
Maintainers (3)

proxy.golang.org: github.com/langfuse/langfuse-js

Homepage:
Documentation: https://pkg.go.dev/github.com/langfuse/langfuse-js#section-documentation
Licenses: other
Latest release: v6.1.0+incompatible (published 2 days ago)
Last Synced: 2026-10-31T17:04:53.389Z (2 days ago)
Versions: 318
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent packages count: 4.829%
- Average: 4.992%
- Dependent repos count: 5.154%

npmjs.org: langfuse

NOT the latest Langfuse JS/TS SDK. Deprecated v3 client (new Langfuse(), trace(), api.traceList). For new work: npm install @langfuse/tracing @langfuse/otel @opentelemetry/sdk-node. Docs: https://langfuse.com/docs/observability/sdk/overview

Homepage: https://langfuse.com/docs/observability/sdk/overview
Licenses: MIT
Latest release: 3.39.2 (published about 2 months ago)
Last Synced: 2026-10-31T17:06:06.232Z (2 days ago)
Versions: 236
Dependent Packages: 1
Dependent Repositories: 3
Downloads: 7,463,568 Last month
Docker Downloads: 7,262
Rankings:
- Downloads: 2.498%
- Dependent repos count: 6.358%
- Average: 9.937%
- Dependent packages count: 20.956%
Maintainers (3)

npmjs.org: @langfuse/vercel-ai-sdk

Langfuse integration for Vercel AI SDK v7

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:05:07.962Z (2 days ago)
Versions: 18
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 1,444,104 Last month
Rankings:
- Downloads: 4.323%
- Average: 18.95%
- Dependent repos count: 21.516%
- Dependent packages count: 31.01%
Maintainers (3)

npmjs.org: langfuse-node

LEGACY Langfuse v3 SDK for Node.js < 18 (maintenance mode). For new projects use the current Langfuse JS/TS SDK: npm install @langfuse/tracing @langfuse/otel @langfuse/client

Homepage: https://langfuse.com/docs/observability/sdk/overview
Licenses: MIT
Latest release: 3.39.2 (published about 2 months ago)
Last Synced: 2026-10-31T17:07:45.977Z (2 days ago)
Versions: 221
Dependent Packages: 0
Dependent Repositories: 1
Downloads: 26,085 Last month
Rankings:
- Downloads: 4.04%
- Dependent repos count: 10.324%
- Average: 22.11%
- Dependent packages count: 51.966%
Maintainers (3)

npmjs.org: @langfuse/browser

Langfuse browser SDK for public-key score ingestion

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:05:07.391Z (2 days ago)
Versions: 21
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 109,475 Last month
Rankings:
- Dependent repos count: 21.162%
- Average: 25.83%
- Dependent packages count: 30.498%
Maintainers (3)

npmjs.org: @marces/langfuse

![GitHub Banner](https://github.com/langfuse/langfuse-js/assets/2834609/d1613347-445f-4e91-9e84-428fda9c3659)

Homepage: https://github.com/langfuse/langfuse-js#readme
Licenses: MIT
Latest release: 3.38.8 (published about 1 year ago)
Last Synced: 2026-10-31T17:05:42.764Z (2 days ago)
Versions: 3
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 11 Last month
Rankings:
- Dependent repos count: 23.938%
- Average: 29.235%
- Dependent packages count: 34.533%
Maintainers (1)
- marces

npmjs.org: @marces/langfuse-core

![GitHub Banner](https://github.com/langfuse/langfuse-js/assets/2834609/d1613347-445f-4e91-9e84-428fda9c3659)

Homepage: https://github.com/langfuse/langfuse-js#readme
Licenses: MIT
Latest release: 3.38.6 (published about 1 year ago)
Last Synced: 2026-10-31T17:11:40.288Z (2 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 15 Last month
Rankings:
- Dependent repos count: 23.938%
- Average: 29.235%
- Dependent packages count: 34.533%
Maintainers (1)
- marces

npmjs.org: @langfuse/langchain

Langfuse integration for LangChain

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:06:20.387Z (2 days ago)
Versions: 73
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 1,076,739 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: @langfuse/openai

Langfuse integration for OpenAI SDK

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:08:16.100Z (2 days ago)
Versions: 73
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 663,316 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: @langfuse/tracing

Langfuse instrumentation methods based on OpenTelemetry

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:09:01.424Z (2 days ago)
Versions: 77
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 11,644,277 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: @langfuse/core

Core functions and utilities for Langfuse packages

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:11:54.500Z (2 days ago)
Versions: 80
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 13,370,001 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: @langfuse/client

Langfuse API client for universal JavaScript environments

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:13:10.288Z (2 days ago)
Versions: 74
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 6,859,448 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: @langfuse/otel

Langfuse OpenTelemetry export helpers

Homepage:
Licenses: MIT
Latest release: 6.1.0 (published 3 days ago)
Last Synced: 2026-10-31T17:15:47.154Z (2 days ago)
Versions: 77
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 10,492,380 Last month
Rankings:
- Dependent repos count: 24.044%
- Average: 29.368%
- Dependent packages count: 34.692%
Maintainers (3)

npmjs.org: langfuse-vercel

LEGACY Langfuse v3 integration for Vercel AI SDK (maintenance mode). For new projects use @langfuse/otel with the AI SDK's experimental_telemetry: npm install @langfuse/otel @langfuse/tracing

Homepage: https://langfuse.com/docs/observability/sdk/overview
Licenses: MIT
Latest release: 3.39.2 (published about 2 months ago)
Last Synced: 2026-10-31T17:09:55.404Z (2 days ago)
Versions: 70
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 426,451 Last month
Rankings:
- Dependent repos count: 26.1%
- Average: 32.01%
- Dependent packages count: 37.919%
Maintainers (3)

npmjs.org: langfuse-core

NOT the latest Langfuse JS/TS SDK. Legacy v3 shared core — do not install directly. Current SDK: npm install @langfuse/tracing @langfuse/otel @opentelemetry/sdk-node

Homepage: https://langfuse.com/docs/observability/sdk/overview
Licenses: MIT
Latest release: 3.39.2 (published about 2 months ago)
Last Synced: 2026-10-31T17:07:09.793Z (2 days ago)
Versions: 135
Dependent Packages: 3
Dependent Repositories: 0
Downloads: 7,225,938 Last month
Docker Downloads: 5,038,550
Rankings:
- Dependent repos count: 36.331%
- Average: 44.247%
- Dependent packages count: 52.164%
Maintainers (3)

Dependencies

.github/workflows/ci.yml actions

actions/cache v3 composite
actions/checkout v3 composite
actions/setup-node v3 composite

.github/workflows/codeql.yml actions

actions/checkout v3 composite
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package.json npm

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rollup-plugin-typescript2 ^0.35.0 development
ts-jest ^29.1.1 development
ts-node ^10.9.1 development
tslib ^2.6.1 development
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packages/tracing/package.json npm

@langfuse/core workspace:^

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packages/langchain/package.json npm

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packages/openai/package.json npm

openai ^5.0.0 development
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amannn/action-semantic-pull-request 48f256284bd46cdaab1048c3721360e808335d50 composite

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packages/otel/package.json npm

@langfuse/core workspace:^

packages/vercel-ai-sdk/package.json npm

ai 7.0.44 development
@ai-sdk/otel ^1.0.44
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pnpm-workspace.yaml npm

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packages/client/package.json npm

@types/mustache ^4.2.6 development
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packages/browser/package.json npm

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@types/node ^24.1.0 development

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pnpm-lock.yaml npm

828 dependencies

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