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Description
Langfuse is a free and open-source LLM engineering platform that helps teams to debug, analyze, and iterate their LLM Applications.
Observability: Incorporate Langfuse into your app to start ingesting traces.
Langfuse UI : inspect and debug complex logs, user sessions and user sessions
Langfuse Prompts: Manage versions, deploy prompts and manage prompts within Langfuse
Analytics: Track metrics such as cost, latency and quality (LLM) to gain insights through dashboards & data exports
Evals: Calculate and collect scores for your LLM completions
Experiments: Track app behavior and test it before deploying new versions
Why Langfuse?
- Open source
- Models and frameworks are agnostic
- Built for production
- Incrementally adaptable - Start with a single LLM or integration call, then expand to the full tracing for complex chains/agents
- Use GET to create downstream use cases and export the data
Description
Respan is an AI observability and evaluation platform designed to help teams monitor, test, and optimize AI agents at scale. It provides deep execution tracing across conversations, tool invocations, routing logic, memory states, and final outputs. Rather than stopping at basic logging, Respan creates a closed-loop system that links monitoring, evaluation, and iteration into one workflow. Teams can define stable, metric-driven evaluation frameworks focused on performance indicators like reliability, safety, cost efficiency, and accuracy. Built-in capability and regression testing protects existing behaviors while enabling controlled experimentation and improvement. A dedicated evaluation agent uses AI to analyze failed trials, localize root causes, and suggest what to test next. Multi-trial evaluation accounts for non-deterministic outputs common in modern AI systems. Respan integrates with major AI providers and frameworks including OpenAI, Anthropic, LangChain, and Google Vertex AI. Designed for high-scale environments handling trillions of tokens, it supports enterprise-grade reliability. Backed by ISO 27001, SOC 2, GDPR, and HIPAA compliance, Respan delivers secure observability for production AI systems.
API Access
Has API
Yes
API Access
Has API
No
Integrations
Claude
Yes
Dograh
Yes
Flowise
Yes
GPT-3.5
No
Gemini
No
Gemini 2.0
No
Gemini 2.0 Flash
No
Gemini Enterprise
No
Google AI Plus
No
Hugging Face
Yes
Integrations
Claude
Yes
Dograh
No
Flowise
No
GPT-3.5
Yes
Gemini
Yes
Gemini 2.0
Yes
Gemini 2.0 Flash
Yes
Gemini Enterprise
Yes
Google AI Plus
Yes
Hugging Face
No
Pricing Details
$29/month
Generous free tier and Pro Plans starting at USD 29/month.
Langfuse is open source so you will always be able to host the software yourself at no cost.
Langfuse is open source so you will always be able to host the software yourself at no cost.
Free Trial
Yes
Free Version
Yes
Pricing Details
$0/month
Free Trial
No
Free Version
No
Deployment
Web-Based
Yes
On-Premises
Yes
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Customer Support
Business Hours
No
Live Rep (24/7)
Yes
Online Support
Yes
Customer Support
Business Hours
Yes
Live Rep (24/7)
Yes
Online Support
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Vendor Details
Company Name
Langfuse
Founded
2023
Country
Germany
Website
langfuse.com
Vendor Details
Company Name
Respan
Founded
2023
Country
United States
Website
www.respan.ai/
Product Features
Product Features
DevOps
Approval Workflow
No
Dashboard
No
KPIs
No
Policy Management
No
Portfolio Management
No
Prioritization
No
Release Management
No
Timeline Management
No
Troubleshooting Reports
No