# Langfuse

> Langfuse is an **open-source LLM engineering platform** ([GitHub](https://github.com/langfuse/langfuse)) that helps teams collaboratively debug, analyze, and iterate on their LLM applications. All platform features are natively integrated to accelerate the development workflow.

## Docs

- [Docs](https://langfuse.com/docs)
- [Daily Metrics Api](https://langfuse.com/docs/analytics/daily-metrics-api)
- [Example Intent Classification](https://langfuse.com/docs/analytics/example-intent-classification)
- [Overview](https://langfuse.com/docs/analytics/overview)
- [Posthog](https://langfuse.com/docs/analytics/posthog)
- [Data Security Privacy](https://langfuse.com/docs/data-security-privacy)
- [Get Started](https://langfuse.com/docs/datasets/get-started)
- [Overview](https://langfuse.com/docs/datasets/overview)
- [Python Cookbook](https://langfuse.com/docs/datasets/python-cookbook)
- [Demo](https://langfuse.com/docs/demo)
- [Feature Overview](https://langfuse.com/docs/deployment/feature-overview)
- [Local](https://langfuse.com/docs/deployment/local)
- [Self Host](https://langfuse.com/docs/deployment/self-host)
- [Blobstorage](https://langfuse.com/docs/deployment/v3/components/blobstorage)
- [Clickhouse](https://langfuse.com/docs/deployment/v3/components/clickhouse)
- [Redis](https://langfuse.com/docs/deployment/v3/components/redis)
- [Docker Compose](https://langfuse.com/docs/deployment/v3/guides/docker-compose)
- [Kubernetes Helm](https://langfuse.com/docs/deployment/v3/guides/kubernetes-helm)
- [Migrate V2 To V3](https://langfuse.com/docs/deployment/v3/migrate-v2-to-v3)
- [Overview](https://langfuse.com/docs/deployment/v3/overview)
- [Fine Tuning](https://langfuse.com/docs/fine-tuning)
- [Get Started](https://langfuse.com/docs/get-started)
- [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock)
- [Dify](https://langfuse.com/docs/integrations/dify)
- [Dspy](https://langfuse.com/docs/integrations/dspy)
- [Flowise](https://langfuse.com/docs/integrations/flowise)
- [Example Python](https://langfuse.com/docs/integrations/haystack/example-python)
- [Get Started](https://langfuse.com/docs/integrations/haystack/get-started)
- [Instructor](https://langfuse.com/docs/integrations/instructor)
- [Example Javascript](https://langfuse.com/docs/integrations/langchain/example-javascript)
- [Example Python](https://langfuse.com/docs/integrations/langchain/example-python)
- [Example Python Langgraph](https://langfuse.com/docs/integrations/langchain/example-python-langgraph)
- [Example Python Langserve](https://langfuse.com/docs/integrations/langchain/example-python-langserve)
- [Tracing](https://langfuse.com/docs/integrations/langchain/tracing)
- [Upgrade Paths](https://langfuse.com/docs/integrations/langchain/upgrade-paths)
- [Langflow](https://langfuse.com/docs/integrations/langflow)
- [Example Proxy Js](https://langfuse.com/docs/integrations/litellm/example-proxy-js)
- [Example Proxy Python](https://langfuse.com/docs/integrations/litellm/example-proxy-python)
- [Tracing](https://langfuse.com/docs/integrations/litellm/tracing)
- [Deprecated Llama Index Callback](https://langfuse.com/docs/integrations/llama-index/deprecated-llama-index-callback)
- [Example Python](https://langfuse.com/docs/integrations/llama-index/example-python)
- [Example Python Instrumentation Module](https://langfuse.com/docs/integrations/llama-index/example-python-instrumentation-module)
- [Get Started](https://langfuse.com/docs/integrations/llama-index/get-started)
- [Example Python](https://langfuse.com/docs/integrations/mirascope/example-python)
- [Tracing](https://langfuse.com/docs/integrations/mirascope/tracing)
- [Mistral Sdk](https://langfuse.com/docs/integrations/mistral-sdk)
- [Ollama](https://langfuse.com/docs/integrations/ollama)
- [Examples](https://langfuse.com/docs/integrations/openai/js/examples)
- [Get Started](https://langfuse.com/docs/integrations/openai/js/get-started)
- [Assistants Api](https://langfuse.com/docs/integrations/openai/python/assistants-api)
- [Examples](https://langfuse.com/docs/integrations/openai/python/examples)
- [Get Started](https://langfuse.com/docs/integrations/openai/python/get-started)
- [Structured Outputs](https://langfuse.com/docs/integrations/openai/python/structured-outputs)
- [Track Errors](https://langfuse.com/docs/integrations/openai/python/track-errors)
- [Openwebui](https://langfuse.com/docs/integrations/openwebui)
- [Milvus](https://langfuse.com/docs/integrations/other/milvus)
- [Ragas](https://langfuse.com/docs/integrations/other/ragas)
- [Overview](https://langfuse.com/docs/integrations/overview)
- [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)
- [Vercel Ai Sdk](https://langfuse.com/docs/integrations/vercel-ai-sdk)
- [Model Usage And Cost](https://langfuse.com/docs/model-usage-and-cost)
- [Open Source](https://langfuse.com/docs/open-source)
- [Playground](https://langfuse.com/docs/playground)
- [Example Langchain](https://langfuse.com/docs/prompts/example-langchain)
- [Example Langchain Js](https://langfuse.com/docs/prompts/example-langchain-js)
- [Example Openai Functions](https://langfuse.com/docs/prompts/example-openai-functions)
- [Get Started](https://langfuse.com/docs/prompts/get-started)
- [Query Traces](https://langfuse.com/docs/query-traces)
- [Rbac](https://langfuse.com/docs/rbac)
- [Roadmap](https://langfuse.com/docs/roadmap)
- [Annotation](https://langfuse.com/docs/scores/annotation)
- [Custom](https://langfuse.com/docs/scores/custom)
- [Data Model](https://langfuse.com/docs/scores/data-model)
- [External Evaluation Pipelines](https://langfuse.com/docs/scores/external-evaluation-pipelines)
- [Model Based Evals](https://langfuse.com/docs/scores/model-based-evals)
- [Overview](https://langfuse.com/docs/scores/overview)
- [User Feedback](https://langfuse.com/docs/scores/user-feedback)
- [Overview](https://langfuse.com/docs/sdk/overview)
- [Decorators](https://langfuse.com/docs/sdk/python/decorators)
- [Example](https://langfuse.com/docs/sdk/python/example)
- [Low Level Sdk](https://langfuse.com/docs/sdk/python/low-level-sdk)
- [Example Vercel Ai](https://langfuse.com/docs/sdk/typescript/example-vercel-ai)
- [Guide](https://langfuse.com/docs/sdk/typescript/guide)
- [Guide Web](https://langfuse.com/docs/sdk/typescript/guide-web)
- [Example Python](https://langfuse.com/docs/security/example-python)
- [Getting Started](https://langfuse.com/docs/security/getting-started)
- [Overview](https://langfuse.com/docs/security/overview)
- [Tracing](https://langfuse.com/docs/tracing)
- [Log Levels](https://langfuse.com/docs/tracing-features/log-levels)
- [Masking](https://langfuse.com/docs/tracing-features/masking)
- [Metadata](https://langfuse.com/docs/tracing-features/metadata)
- [Multi Modality](https://langfuse.com/docs/tracing-features/multi-modality)
- [Releases And Versioning](https://langfuse.com/docs/tracing-features/releases-and-versioning)
- [Sampling](https://langfuse.com/docs/tracing-features/sampling)
- [Sessions](https://langfuse.com/docs/tracing-features/sessions)
- [Tags](https://langfuse.com/docs/tracing-features/tags)
- [Url](https://langfuse.com/docs/tracing-features/url)
- [Users](https://langfuse.com/docs/tracing-features/users)

## Other

- [Langfuse.Com](https://langfuse.com)
- [About](https://langfuse.com/about)
- [Careers](https://langfuse.com/careers)
- [Cn](https://langfuse.com/cn)
- [Cookie Policy](https://langfuse.com/cookie-policy)
- [Enterprise](https://langfuse.com/enterprise)
- [Imprint](https://langfuse.com/imprint)
- [Jp](https://langfuse.com/jp)
- [Kr](https://langfuse.com/kr)
- [Library](https://langfuse.com/library)
- [Oss Friends](https://langfuse.com/oss-friends)
- [Pricing](https://langfuse.com/pricing)
- [Pricing Self Host](https://langfuse.com/pricing-self-host)
- [Privacy](https://langfuse.com/privacy)
- [Schedule Demo](https://langfuse.com/schedule-demo)
- [Support](https://langfuse.com/support)
- [Terms](https://langfuse.com/terms)
- [Why](https://langfuse.com/why)

## Optional

- [Blog](https://langfuse.com/blog)
- [2024 04 Introducing Langfuse 2.0](https://langfuse.com/blog/2024-04-introducing-langfuse-2.0)
- [2024 04 Python Decorator](https://langfuse.com/blog/2024-04-python-decorator)
- [2024 05 Haystack Integration](https://langfuse.com/blog/2024-05-haystack-integration)
- [2024 06 Monitoring Llm Security](https://langfuse.com/blog/2024-06-monitoring-llm-security)
- [2024 07 Dify Langfuse Integration](https://langfuse.com/blog/2024-07-dify-langfuse-integration)
- [2024 08 What Is Langchain](https://langfuse.com/blog/2024-08-what-is-langchain)
- [2024 09 Langfuse Proxy](https://langfuse.com/blog/2024-09-langfuse-proxy)
- [2024 10 Observability In Multi Step Llm Systems](https://langfuse.com/blog/2024-10-observability-in-multi-step-llm-systems)
- [2024 10 Opentelemetry For Llm Observability](https://langfuse.com/blog/2024-10-opentelemetry-for-llm-observability)
- [2024 11 17 Launch Week 2](https://langfuse.com/blog/2024-11-17-launch-week-2)
- [2024 11 Llm Product Management](https://langfuse.com/blog/2024-11-llm-product-management)
- [2024 11 Most Used Oss Llmops](https://langfuse.com/blog/2024-11-most-used-oss-llmops)
- [Announcing Our Seed Round](https://langfuse.com/blog/announcing-our-seed-round)
- [Langchain Integration](https://langfuse.com/blog/langchain-integration)
- [Langflow](https://langfuse.com/blog/langflow)
- [Launch Week 1](https://langfuse.com/blog/launch-week-1)
- [Llama Index Integration](https://langfuse.com/blog/llama-index-integration)
- [Product Analytics For LLM Apps](https://langfuse.com/blog/product-analytics-for-LLM-apps)
- [Qa Chatbot For Langfuse Docs](https://langfuse.com/blog/qa-chatbot-for-langfuse-docs)
- [Showcase Llm Chatbot](https://langfuse.com/blog/showcase-llm-chatbot)
- [Update 2023 07](https://langfuse.com/blog/update-2023-07)
- [Update 2023 08](https://langfuse.com/blog/update-2023-08)
- [Update 2023 09](https://langfuse.com/blog/update-2023-09)
- [Update 2023 10](https://langfuse.com/blog/update-2023-10)
- [Uptrain Integration](https://langfuse.com/blog/uptrain-integration)
- [Changelog](https://langfuse.com/changelog)
- [2023 07 19 Launch](https://langfuse.com/changelog/2023-07-19-launch)
- [2023 07 20 Analytics Alpha](https://langfuse.com/changelog/2023-07-20-analytics-alpha)
- [2023 07 20 Token Calculation](https://langfuse.com/changelog/2023-07-20-token-calculation)
- [2023 07 24 Nested Trace Ui](https://langfuse.com/changelog/2023-07-24-nested-trace-ui)
- [2023 07 27 Integration Langchain Python](https://langfuse.com/changelog/2023-07-27-integration-langchain-python)
- [2023 07 27 Project User Management](https://langfuse.com/changelog/2023-07-27-project-user-management)
- [2023 07 31 Human In The Loop Evaluation](https://langfuse.com/changelog/2023-07-31-human-in-the-loop-evaluation)
- [2023 08 07 Extended Usage Get Api](https://langfuse.com/changelog/2023-08-07-extended-usage-get-api)
- [2023 08 14 Public Demo Project](https://langfuse.com/changelog/2023-08-14-public-demo-project)
- [2023 08 16 Prebuilt Docker Image](https://langfuse.com/changelog/2023-08-16-prebuilt-docker-image)
- [2023 08 30 Integration Langchain Js](https://langfuse.com/changelog/2023-08-30-integration-langchain-js)
- [2023 08 31 Track Version And Releases](https://langfuse.com/changelog/2023-08-31-track-version-and-releases)
- [2023 09 01 Token Costs In Usd](https://langfuse.com/changelog/2023-09-01-token-costs-in-usd)
- [2023 09 12 Analytics Alpha Public Access](https://langfuse.com/changelog/2023-09-12-analytics-alpha-public-access)
- [2023 09 14 Public Link Sharing](https://langfuse.com/changelog/2023-09-14-public-link-sharing)
- [2023 09 15 Model Based Evaluation](https://langfuse.com/changelog/2023-09-15-model-based-evaluation)
- [2023 09 18 Export Generations](https://langfuse.com/changelog/2023-09-18-export-generations)
- [2023 09 25 Datasets](https://langfuse.com/changelog/2023-09-25-datasets)
- [2023 09 27 JSON Viewer](https://langfuse.com/changelog/2023-09-27-JSON-viewer)
- [2023 10 03 Complex Filters](https://langfuse.com/changelog/2023-10-03-complex-filters)
- [2023 10 05 Faster Navigation](https://langfuse.com/changelog/2023-10-05-faster-navigation)
- [2023 10 07 Improved Support Of Complex Inputs And Outputs](https://langfuse.com/changelog/2023-10-07-improved-support-of-complex-inputs-and-outputs)
- [2023 10 09 Dashboards](https://langfuse.com/changelog/2023-10-09-dashboards)
- [2023 10 19 Doubled Performance Ingestion Apis](https://langfuse.com/changelog/2023-10-19-doubled-performance-ingestion-apis)
- [2023 10 25 Openai Sdk Integration](https://langfuse.com/changelog/2023-10-25-openai-sdk-integration)
- [2023 10 25 Support Pydantic V1 And V2](https://langfuse.com/changelog/2023-10-25-support-pydantic-v1-and-v2)
- [2023 10 30 Ragas Cookbook](https://langfuse.com/changelog/2023-10-30-ragas-cookbook)
- [2023 10 31 Simplified Self Hosting](https://langfuse.com/changelog/2023-10-31-simplified-self-hosting)
- [2023 11 03 Sso Enforcement](https://langfuse.com/changelog/2023-11-03-sso-enforcement)
- [2023 11 06 Support For Gpt 4 Turbo](https://langfuse.com/changelog/2023-11-06-support-for-gpt-4-turbo)
- [2023 11 13 Support For Langchain Expression Language](https://langfuse.com/changelog/2023-11-13-support-for-langchain-expression-language)
- [2023 11 15 Pretty Generations](https://langfuse.com/changelog/2023-11-15-pretty-generations)
- [2023 11 15 Semantic Releases](https://langfuse.com/changelog/2023-11-15-semantic-releases)
- [2023 11 16 Openai Sdk Version 1](https://langfuse.com/changelog/2023-11-16-openai-sdk-version-1)
- [2023 11 19 More Robust Docker](https://langfuse.com/changelog/2023-11-19-more-robust-docker)
- [2023 12 04 Column Visbility](https://langfuse.com/changelog/2023-12-04-column-visbility)
- [2023 12 12 Rename And Transfer Projects](https://langfuse.com/changelog/2023-12-12-rename-and-transfer-projects)
- [2023 12 13 Sessions](https://langfuse.com/changelog/2023-12-13-sessions)
- [2023 12 28 V2 Sdks](https://langfuse.com/changelog/2023-12-28-v2-sdks)
- [2024 01 02 Sort Trace Table](https://langfuse.com/changelog/2024-01-02-sort-trace-table)
- [2024 01 03 Prompt Management](https://langfuse.com/changelog/2024-01-03-prompt-management)
- [2024 01 16 Trace Tagging](https://langfuse.com/changelog/2024-01-16-trace-tagging)
- [2024 01 29 Custom Model Prices](https://langfuse.com/changelog/2024-01-29-custom-model-prices)
- [2024 02 05 Sdk Level Prompt Caching](https://langfuse.com/changelog/2024-02-05-sdk-level-prompt-caching)
- [2024 02 19 Metrics Api Endpoint](https://langfuse.com/changelog/2024-02-19-metrics-api-endpoint)
- [2024 02 20 Prompt Config](https://langfuse.com/changelog/2024-02-20-prompt-config)
- [2024 02 27 Llama Index Integration](https://langfuse.com/changelog/2024-02-27-llama-index-integration)
- [2024 02 29 Performance Improvement Ui](https://langfuse.com/changelog/2024-02-29-performance-improvement-ui)
- [2024 03 05 Uptrain Integration](https://langfuse.com/changelog/2024-03-05-uptrain-integration)
- [2024 03 07 Claude3](https://langfuse.com/changelog/2024-03-07-Claude3)
- [2024 03 11 Improved Chatml Rendering](https://langfuse.com/changelog/2024-03-11-improved-chatml-rendering)
- [2024 03 24 Python Decorator](https://langfuse.com/changelog/2024-03-24-python-decorator)
- [2024 04 08 Langchain Streaming And Batch](https://langfuse.com/changelog/2024-04-08-langchain-streaming-and-batch)
- [2024 04 09 Openai Integration Linked Prompt Management](https://langfuse.com/changelog/2024-04-09-openai-integration-linked-prompt-management)
- [2024 04 09 Prompt Management Chatml](https://langfuse.com/changelog/2024-04-09-prompt-management-chatml)
- [2024 04 10 ISO 27001 Certification](https://langfuse.com/changelog/2024-04-10-ISO-27001-certification)
- [2024 04 13 Images On Docker Hub](https://langfuse.com/changelog/2024-04-13-images-on-docker-hub)
- [2024 04 21 Openai Integration JS SDK](https://langfuse.com/changelog/2024-04-21-openai-integration-JS-SDK)
- [2024 04 22 Posthog Integration](https://langfuse.com/changelog/2024-04-22-posthog-integration)
- [2024 04 23 Prompt Playground](https://langfuse.com/changelog/2024-04-23-prompt-playground)
- [2024 04 24 Decorator](https://langfuse.com/changelog/2024-04-24-decorator)
- [2024 04 25 Datasets V2](https://langfuse.com/changelog/2024-04-25-datasets-v2)
- [2024 04 26 Model Based Evaluation](https://langfuse.com/changelog/2024-04-26-model-based-evaluation)
- [2024 04 30 SOC 2 Type 2 Certification](https://langfuse.com/changelog/2024-04-30-SOC-2-Type-2-certification)
- [2024 05 07 Prompts Api And Deployment Labels](https://langfuse.com/changelog/2024-05-07-prompts-api-and-deployment-labels)
- [2024 05 14 Openai Gpt 4o](https://langfuse.com/changelog/2024-05-14-openai-gpt-4o)
- [2024 05 14 Openai Gpt 4o Playground Evals](https://langfuse.com/changelog/2024-05-14-openai-gpt-4o-playground-evals)
- [2024 05 16 Mirascope Integration](https://langfuse.com/changelog/2024-05-16-mirascope-integration)
- [2024 05 16 Prompts Version Insights](https://langfuse.com/changelog/2024-05-16-prompts-version-insights)
- [2024 05 16 Sticky Headings](https://langfuse.com/changelog/2024-05-16-sticky-headings)
- [2024 05 17 Haystack Integration](https://langfuse.com/changelog/2024-05-17-haystack-integration)
- [2024 05 23 Dark Mode](https://langfuse.com/changelog/2024-05-23-dark-mode)
- [2024 05 29 Openai Assistants](https://langfuse.com/changelog/2024-05-29-openai-assistants)
- [2024 06 05 Annotation](https://langfuse.com/changelog/2024-06-05-annotation)
- [2024 06 06 Monitoring Llm Security Docs](https://langfuse.com/changelog/2024-06-06-monitoring-llm-security-docs)
- [2024 06 10 Update Indicator](https://langfuse.com/changelog/2024-06-10-update-indicator)
- [2024 06 12 Timeline View](https://langfuse.com/changelog/2024-06-12-timeline-view)
- [2024 06 26 Dify Integration](https://langfuse.com/changelog/2024-06-26-dify-integration)
- [2024 07 02 Datasets Api V2](https://langfuse.com/changelog/2024-07-02-datasets-api-v2)
- [2024 07 03 Models Api](https://langfuse.com/changelog/2024-07-03-models-api)
- [2024 07 04 Query Traces Via Sdks](https://langfuse.com/changelog/2024-07-04-query-traces-via-sdks)
- [2024 07 11 Non Numeric Scores Api](https://langfuse.com/changelog/2024-07-11-non-numeric-scores-api)
- [2024 07 15 Render Markdown Trace Preview](https://langfuse.com/changelog/2024-07-15-render-markdown-trace-preview)
- [2024 07 18 Openai Gpt 4o Mini](https://langfuse.com/changelog/2024-07-18-openai-gpt-4o-mini)
- [2024 07 30 Resizable Columns](https://langfuse.com/changelog/2024-07-30-resizable-columns)
- [2024 08 02 Vercel Ai Sdk Integration](https://langfuse.com/changelog/2024-08-02-vercel-ai-sdk-integration)
- [2024 08 08 Openai Structured Outputs](https://langfuse.com/changelog/2024-08-08-openai-structured-outputs)
- [2024 08 13 Organizations](https://langfuse.com/changelog/2024-08-13-organizations)
- [2024 08 14 Ui Customization](https://langfuse.com/changelog/2024-08-14-ui-customization)
- [2024 08 15 Deployment As Porter Add On](https://langfuse.com/changelog/2024-08-15-deployment-as-porter-add-on)
- [2024 08 19 Score Analytics](https://langfuse.com/changelog/2024-08-19-score-analytics)
- [2024 08 20 Comments](https://langfuse.com/changelog/2024-08-20-comments)
- [2024 08 21 Openai Multi Modal Traces](https://langfuse.com/changelog/2024-08-21-openai-multi-modal-traces)
- [2024 09 04 Headless Initialization Of Self Hosted Deployments](https://langfuse.com/changelog/2024-09-04-headless-initialization-of-self-hosted-deployments)
- [2024 09 04 Prompt Management Zero Latency](https://langfuse.com/changelog/2024-09-04-prompt-management-zero-latency)
- [2024 09 13 Custom Basepath For Self Hosted Deployments](https://langfuse.com/changelog/2024-09-13-custom-basepath-for-self-hosted-deployments)
- [2024 09 13 Openai O1 Models](https://langfuse.com/changelog/2024-09-13-openai-o1-models)
- [2024 09 17 Prompt Linking Langchain](https://langfuse.com/changelog/2024-09-17-prompt-linking-langchain)
- [2024 09 20 Aws Marketplace](https://langfuse.com/changelog/2024-09-20-aws-marketplace)
- [2024 09 20 Dspy Integration Example](https://langfuse.com/changelog/2024-09-20-dspy-integration-example)
- [2024 09 23 Github Discussion Across Documentation](https://langfuse.com/changelog/2024-09-23-github-discussion-across-documentation)
- [2024 10 10 Annotation Queues](https://langfuse.com/changelog/2024-10-10-annotation-queues)
- [2024 10 10 Text Color For Latency And Costs](https://langfuse.com/changelog/2024-10-10-text-color-for-latency-and-costs)
- [2024 10 11 Bedrock Support Playground Evals](https://langfuse.com/changelog/2024-10-11-bedrock-support-playground-evals)
- [2024 10 11 Extended Eval Models](https://langfuse.com/changelog/2024-10-11-extended-eval-models)
- [2024 10 25 Input Output Masking](https://langfuse.com/changelog/2024-10-25-input-output-masking)
- [2024 11 01 Collapsible Sidebar](https://langfuse.com/changelog/2024-11-01-collapsible-sidebar)
- [2024 11 17 Llms Txt](https://langfuse.com/changelog/2024-11-17-llms-txt)
- [2024 11 17 Vercel Ai Sdk Prompt Mgmt](https://langfuse.com/changelog/2024-11-17-vercel-ai-sdk-prompt-mgmt)
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