Ad
Reach users actively searching for AI tools. 50,000+ monthly targeted views available.
Langfuse logo

Langfuse

4.6
• 165 views

Langfuse is an open-source platform that helps you understand how your AI applications are working. It lets you see what's happening inside your Large Language Model (LLM) apps, find problems, and test new versions to make them better and more efficient.

Visit Website
Free Option
OverviewFeaturesUse CasesFAQIntegrationsPricing

About Langfuse

Who It's For

Langfuse is for developers and teams building AI applications with Large Language Models (LLMs). It helps anyone who needs to see how their AI apps are performing, find problems, and make them more reliable and efficient.

What You Get

You get a clear picture of your AI application's activity. This includes tracking response times, token usage, and costs. You can also create tests to compare different AI versions, run A/B tests, and collect feedback to continuously improve your applications.

How It Works

Langfuse uses simple code (SDKs) to record every step your AI application takes. It captures full "traces" of interactions, letting you inspect failures easily. This helps you quickly debug issues and gather valuable data to build better AI models.

Visit Website
Langfuse

Your Ad Here

Reach users actively searching for AI tools. 50,000+ monthly targeted views available.

Ad
Become a Sponsor

Features & Capabilities

🔍 LLM Observability

Complete LLM Application Tracing

Captures full execution traces of LLM applications and agents for comprehensive visibility.

Failure Debugging & Inspection

Allows users to inspect traces to identify, understand, and debug application failures.

Evaluation Dataset Generation

Enables the creation of robust evaluation datasets directly from captured traces.

OpenTelemetry & Library Compatibility

Built on OpenTelemetry standards with support for all major LLM and agent libraries.

⚙️ Development & Deployment

Multi-language SDKs

Provides dedicated Software Development Kits for Python and JavaScript/TypeScript for easy integration.

Open Source & Self-Hosting

Offers the flexibility to run the platform locally or self-host for complete control.

Drop-in LLM Integrations

Features seamless, drop-in wrappers for popular LLM providers with automatic tracing.

🔒 Enterprise Security & Management

Enterprise SSO & RBAC

Supports Enterprise Single Sign-On (SSO) and fine-grained Role-Based Access Control for secure team management.

Audit Logs & SCIM API

Offers comprehensive audit logs and a SCIM API for advanced user provisioning and compliance.

Industry Compliance & Certifications

Achieves certifications like SOC 2 Type II, ISO 27001, GDPR compliance, and HIPAA alignment for enterprise readiness.

Use Cases

Debugging and Troubleshooting LLM Application Failures

Developers building complex LLM applications often struggle to identify the root cause of unexpected outputs or failures. Langfuse provides comprehensive tracing capabilities to capture every step of an LLM interaction, allowing teams to inspect failures, understand agent behavior, and quickly resolve issues to improve reliability.

B2B SaaSFor: AI Developers

Optimizing LLM Application Performance and Cost

As LLM applications scale, managing their operational costs and ensuring optimal performance becomes critical. Langfuse allows teams to track key performance indicators such as token usage, response times, and costs, enabling data-driven decisions to optimize resource consumption and enhance user experience.

TechnologyFor: ML Engineers

Systematic Evaluation and A/B Testing for LLM Agents

Iteratively improving LLM agents requires a robust framework for evaluating output quality and comparing different versions. Langfuse provides tools to create evaluation datasets, conduct LLM-as-a-judge experiments, track scores, and perform A/B tests, ensuring continuous improvement of AI models and features.

AI/ML DevelopmentFor: Data Scientists

Secure and Scalable Deployment of Production LLM Systems

Enterprises deploying LLM applications face challenges with security, compliance, and managing large-scale infrastructure. Langfuse supports secure self-hosting, offers enterprise-grade features like SOC 2 and GDPR compliance, SSO, and environment management, enabling organizations to confidently deploy and operate AI solutions at scale.

Enterprise TechnologyFor: DevOps Engineers

Frequently asked questions

Tags

llm evaluationllm tracingllm debuggingapplication debuggingopentelemetry

Specifications

Deployment
API
Self-hosted
Browser
Cloud
Target Audience
Individual
Startup
Business
Enterprise
Complexity
Developer

Pricing

Hobby

Per monthly

Free
  • All platform features (with limits)
  • 50k units / month included
  • 30 days data access
  • 2 users
  • Community support via GitHub
  • Unlimited Prompt Fetching
  • 1 Human Annotation Queue
  • Unlimited Projects
  • Extensive Public API (General 30 requests/min, Datasets 100 requests/min, Metrics 100 requests/day)
  • Batch Export via UI, PostHog, Mixpanel Integrations
  • Ask AI
  • Data region: US or EU, Data masking
  • SSO via Google, AzureAD, GitHub
  • Organization-level RBAC
  • Standard T&Cs & Data Processing Agreement (GDPR)

Core

Per monthly

$29
  • Includes all features from the Hobby plan
  • 100k units / month included, additional: $8/100k units
  • 90 days data access
  • Unlimited users
  • In-app support (48h Response time SLO)
  • Increased ingestion throughput (4,000 requests / min)
  • 3 Human Annotation Queues
  • Higher API rate limits (General 100 requests/min, Datasets 200 requests/min, Metrics 200 requests/day)
  • Self-serve subscription, Credit card payments, Monthly contracts
  • Standard T&Cs & Data Processing Agreement (GDPR)

Pro

Per monthly

$199
  • Includes all features from the Core plan
  • Unlimited data access
  • Data retention management
  • Unlimited Human Annotation Queues
  • Increased ingestion throughput (20,000 requests / min)
  • High API rate limits (General 1,000 requests/min, Datasets 1,000 requests/min, Metrics 2000 requests/day)
  • SOC2 Type II & ISO27001 reports
  • HIPAA compliance (BAA available)
  • Prioritized in-app support (48h Response time SLO)

Enterprise

Per monthly

$2499
  • Includes all features from the Pro plan
  • Teams Add-on features (Enterprise SSO, SSO enforcement, Fine-grained RBAC, Support via Dedicated Slack Channel, Protected Deployment Labels, Scheduled Batch Export to Blob Storage, Project-level RBAC, 24h Response time SLO)
  • Audit Logs
  • SCIM API for automated user provisioning
  • Custom Ingestion throughput and API rate limits
  • Uptime SLA
  • Support SLA
  • Dedicated Support Engineer
  • Onboarding & Architectural guidance
  • Custom Usage Pricing (with Yearly Commitment)
  • Billing via AWS Marketplace, Invoice payment option
  • Custom Contract Terms & DPA
  • InfoSec/legal reviews (with Yearly Commitment)

✓ Free plan • ✓ Plans from $29 / monthly • ✓ Enterprise options

Integrations

OpenAI
OpenTelemetry
GitHub
Docker
Slack
mem0

Links

Website

Similar Agents

LangWatch

LangWatch

Category mock

Test and improve your AI agents before users find issues.

LangSmith

LangSmith

Category mock

Ensure your AI agents work reliably by finding and fixing issues fast.

LangGraph

LangGraph

Category mock

Control AI agents for complex tasks, ensuring reliability.

LangChain

LangChain

Category mock

Get full control and visibility to build and deploy reliable AI agents.