Logfire

Logfire

Pydantic
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About

Langfuse is an open source LLM engineering platform to help teams collaboratively debug, analyze and iterate on their LLM Applications. Observability: Instrument your app and start ingesting traces to Langfuse Langfuse UI: Inspect and debug complex logs and user sessions Prompts: Manage, version and deploy prompts from within Langfuse Analytics: Track metrics (LLM cost, latency, quality) and gain insights from dashboards & data exports Evals: Collect and calculate scores for your LLM completions Experiments: Track and test app behavior before deploying a new version Why Langfuse? - Open source - Model and framework agnostic - Built for production - Incrementally adoptable - start with a single LLM call or integration, then expand to full tracing of complex chains/agents - Use GET API to build downstream use cases and export data

About

Pydantic Logfire is an observability platform designed to simplify monitoring for Python applications by transforming logs into actionable insights. It provides performance insights, tracing, and visibility into application behavior, including request headers, body, and the full trace of execution. Pydantic Logfire integrates with popular libraries and is built on top of OpenTelemetry, making it easier to use while retaining the flexibility of OpenTelemetry's features. Developers can instrument their apps with structured data, and query-ready Python objects, and gain real-time insights through visualizations, dashboards, and alerts. Logfire also supports manual tracing, context logging, and exception capturing, providing a modern logging interface. It is tailored for developers seeking a streamlined, effective observability tool with out-of-the-box integrations and ease of use.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Software Engineers, AI Engineers, Data Scientists, Product Managers

Audience

Professional users looking for a tool to monitor and troubleshoot Python applications

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$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

Pricing

$2 per month
Free Version
Free Trial

Reviews/Ratings

Overall 5.0 / 5
ease 4.0 / 5
features 5.0 / 5
design 4.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • I like that this is exclusively designed for LLMs only, so it takes a lot of clutter out of having to deal with features to do with rest of the models. Scores are very comprehensive including the ones related to query/response, ability to find rag relevance, cost related metrics which other tools typically do not offer and comprehensive trace function.

Cons

  • There wasn't much but if I have to highlight something here, self hosting was difficult. And the main dashboard can have drill downs to take it to relevant sections in traces/generations etc

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Langfuse
Founded: 2023
Germany
langfuse.com

Company Information

Pydantic
United States
pydantic.dev/logfire

Alternatives

Alternatives

Arize Phoenix

Arize Phoenix

Arize AI
TelemetryHub

TelemetryHub

TelemetryHub by Scout APM

Categories

Categories

Integrations

OpenAI
Claude
Disco.dev
Dograh
EarlyCore
Flowise
Hugging Face
Lamatic.ai
LangChain
LiteLLM
LlamaIndex
Mirascope
Netguru Omega
OpenTelemetry
Python
SQLAlchemy
TierZero
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Workers by Delos

Integrations

OpenAI
Claude
Disco.dev
Dograh
EarlyCore
Flowise
Hugging Face
Lamatic.ai
LangChain
LiteLLM
LlamaIndex
Mirascope
Netguru Omega
OpenTelemetry
Python
SQLAlchemy
TierZero
Voker
Workers by Delos
Claim Langfuse and update features and information
Claim Langfuse and update features and information
Claim Logfire and update features and information
Claim Logfire and update features and information