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FAQ

These FAQs are the most common questions we receive. If your question is not answered below, please open a new discussion on GitHub Discussions.

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The Langfuse AI assistant helps you find answers about Langfuse’s features, integrations, and best practices. It’s trained on our documentation, GitHub discussions/issues, and API.

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Categories

Administration

I cannot see my organization in LangfuseI want to delete / cancel / close my Langfuse accountHow do I enforce 2FA for all users?I have forgotten my passwordInviting co-workers to Langfuse

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API

Why do I see 524 errors on Langfuse API calls?Are there any limits to the Langfuse API?

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Article

Monitoring AI Research Assistants - Ensuring Accuracy and ReliabilityWhat are the common challenges of building LLM applications?Chatbot Monitoring with Advanced ObservabilityLLM Analytics 101 - How to Improve your LLM appWhat is LLM Observability & Monitoring?

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Auth

I want to delete / cancel / close my Langfuse accountI have forgotten my passwordInviting co-workers to LangfuseWhere is my Langfuse project?

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Case Studies

How Remberg Improves Transparency of AI Features with LangfuseHow Huntr Uses Langfuse to improve their LLM app developmentHow Mava Uses Langfuse to Improve their Usage of OpenAI's API

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Cloud

I cannot see my organization in LangfuseHow do I cut my Langfuse Cloud bill?How to manage different environments in Langfuse?How do I upgrade my Langfuse account?

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Comparison

Braintrust Data Alternatives? The best LLMOps platform?Galileo AI Alternatives? The best LLMOps platform?The best LLMOps Platform? Helicone AlternativesArize AX Alternative? Langfuse vs. Arize AI and Arize Phoenix for LLM ObservabilityLangSmith Alternative? Langfuse vs. LangSmith for LLM Observability

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Datasets

I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?

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Dynamic Prompt Selection

Can I dynamically select sub-prompts at runtime?Using external templating libraries (Jinja, Liquid, etc.) with Langfuse prompts

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Evaluation

How to evaluate sessions/conversations?How to use Langfuse-hosted Evaluators on Dataset Runs?How do I migrate my trace-level evaluators to observation-level evaluators?How to create and manage Score Configs in Langfuse?I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?

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Experiments

How to retrieve experiment scores via UI or API/SDK?

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Help

How can I receive support?How do I report an issue/feedback/bug?

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Integration

How to customize the names of observations within a Langchain trace?How to trace the OpenAI Assistants API?What is LangChain Expression Language (LCEL)?

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Integration LangChain

How to customize the names of observations within a Langchain trace?LangSmith Alternative? Langfuse vs. LangSmith for LLM ObservabilityWhat is LangChain Expression Language (LCEL)?

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Integration OpenAI

How to trace the OpenAI Assistants API?

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Integration Opentelemetry

How to integrate Langfuse with an existing OpenTelemetry setupHow to integrate Langfuse with an existing Sentry setup

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Llm As A Judge

How do I migrate my trace-level evaluators to observation-level evaluators?

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Observability

How to use Langfuse Tracing in Serverless Functions (AWS Lambda, Vercel, Cloudflare Workers, etc.)How do I track LLM cost and tokens in Langfuse?Why are the input and output of a trace empty?How to enable or disable Langfuse tracing?How to evaluate sessions/conversations?

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Observability Get Started

Why are the input and output of a trace empty?I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?

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Platform

Why do I see 524 errors on Langfuse API calls?Are there any limits to the Langfuse API?I cannot see my organization in LangfuseHow do I cut my Langfuse Cloud bill?I want to delete / cancel / close my Langfuse account

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Product

19 Questions about Langfuse AnsweredWhich packages and projects are using Langfuse?How can I self-host Langfuse?Ten Reasons to Use Langfuse for LLM Observability, Evaluations and Prompt Management

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Prompt Management

Can I dynamically select sub-prompts at runtime?How to configure retries and timeouts when fetching prompts?How to measure prompt performance?Link prompt management with tracing in LangfuseHow can I manage my prompts with Langfuse?

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Prompt Management Get Started

I'm not seeing the latest version of my prompt. Why?

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Self Hosting

Are prebuilt ARM images available?Are older versions of the SDK compatible with newer versions of Langfuse?Why is my data retention job running into timeouts?I cannot connect to my docker deployment, what should I do?I have forgotten my password

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GitHub Discussions

We use GitHub Discussions to answer technical questions while making them easy to find. Feel free to open a new thread to get help by the community and Langfuse team.

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