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What is Langfuse?

Langfuse is an open-source platform designed for LLM engineering that allows teams to debug, analyze, and refine their LLM applications at no cost. With its observability feature, you can seamlessly integrate Langfuse into your application to begin capturing traces effectively. The Langfuse UI provides tools to examine and troubleshoot intricate logs as well as user sessions. Additionally, Langfuse enables you to manage prompt versions and deployments with ease through its dedicated prompts feature. In terms of analytics, Langfuse facilitates the tracking of vital metrics such as cost, latency, and overall quality of LLM outputs, delivering valuable insights via dashboards and data exports. The evaluation tool allows for the calculation and collection of scores related to your LLM completions, ensuring a thorough performance assessment. You can also conduct experiments to monitor application behavior, allowing for testing prior to the deployment of any new versions. What sets Langfuse apart is its open-source nature, compatibility with various models and frameworks, robust production readiness, and the ability to incrementally adapt by starting with a single LLM integration and gradually expanding to comprehensive tracing for more complex workflows. Furthermore, you can utilize GET requests to develop downstream applications and export relevant data as needed, enhancing the versatility and functionality of your projects.

What is Agenta?

Agenta is a full-featured, open-source LLMOps platform designed to solve the core challenges AI teams face when building and maintaining large language model applications. Most teams rely on scattered prompts, ad-hoc experiments, and limited visibility into model behavior; Agenta eliminates this chaos by becoming a central hub for all prompt iterations, evaluations, traces, and collaboration. Its unified playground allows developers and product teams to compare prompts and models side-by-side, track version changes, and reuse real production failures as test cases. Through automated evaluation workflows—including LLM-as-a-judge, built-in evaluators, human feedback, and custom scoring—Agenta provides a scientific approach to validating prompts and model updates. The platform supports step-level evaluation, making it easier to diagnose where an agent’s reasoning breaks down instead of inspecting only the final output. Advanced observability tools trace every request, display error points, collect user feedback, and allow teams to annotate logs collaboratively. With one click, any trace can be turned into a long-term test, creating a continuous feedback loop that strengthens reliability over time. Agenta’s UI empowers domain experts to experiment with prompts without writing code, while APIs ensure developers can automate workflows and integrate deeply with their stack. Compatibility with LangChain, LlamaIndex, OpenAI, and any model provider ensures full flexibility without vendor lock-in. Altogether, Agenta accelerates the path from prototype to production, enabling teams to ship robust, well-tested LLM features and intelligent agents faster.

Media

Media

Integrations Supported

Hugging Face
LangChain
OpenAI
Claude
DocsGPT
Dograh
Flowise
Lamatic.ai
LiteLLM
Mirascope
Overmind
Reflexio
Workers by Delos

Integrations Supported

Hugging Face
LangChain
OpenAI
Cohere
Falcon AI
Llama
Llama 2
Llama 3
Llama 3.1
Llama 3.3

API Availability

Has API

API Availability

Has API

Pricing Information

$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.
Free Version
Free Trial Offered?

Pricing Information

Free
Free Version

Supported Platforms

SaaS
On-Prem

Supported Platforms

SaaS

Customer Service / Support

24 Hour Support
Web-Based Support

Customer Service / Support

24 Hour Support
Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Langfuse

Date Founded

2023

Company Location

Germany

Company Website

langfuse.com

Company Facts

Organization Name

Agenta

Date Founded

2023

Company Location

Germany

Company Website

agenta.ai/

Categories and Features

AI Observability

Not specified

LLM Evaluation

Not specified

Observability

Not specified

Prompt Management

Not specified

Categories and Features

Prompt Engineering

Not specified

Prompt Management

Not specified

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