Observability & Monitoring

@langfuse/langchain

Langfuse integration for LangChain, enhancing observability and monitoring.

Status
Generally available
Last checked
Checked · Oct 11, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

Langfuse provides detailed insights into the performance of your LangChain applications. It helps in debugging, auditing, and optimizing machine learning models by tracking their interactions and outcomes.

Langfuse offers a specialized integration for LangChain, providing unique insights and observability features tailored to the needs of developers working with this framework.

When it fits — and when it doesn’t

A good fit for

  • Teams building complex LangChain applications who need detailed observability and debugging tools.

  • Developers looking to integrate performance tracking into their existing LangChain projects.

Look elsewhere if

  • Projects that do not use LangChain or require real-time monitoring

  • Applications where self-hosted solutions are not feasible

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support beyond Python and TypeScript

    Official support is primarily for Python, with secondary support for TypeScript; other languages are not officially supported

  2. 02

    Complex setup process for integrating with existing applications

    Requires significant configuration to integrate tracking into LangChain workflows

What it does well

  • Detailed performance tracking for LangChain applications

  • Auditing and debugging capabilities

  • Integration with Langfuse for observability

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up @langfuse/langchain

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
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