# Langfuse vs Lunary

Updated March 9, 2026

Langfuse

vs

Lunary

## Overview

**Rating**

10.0 / 10

**Rating**

10.0 / 10

**Best For**

Teams who want open-source LLM observability they can self-host and customize

**Best For**

—

### Product Summary

Langfuse is an open-source LLM observability platform that provides tracing, analytics, prompt management, and evaluation for AI applications. It captures detailed traces of LLM calls, supports custom scoring, and integrates with LangChain, LlamaIndex, Vercel AI SDK, and raw API calls. Langfuse can be self-hosted for data privacy or used as a managed cloud service. Its open-source model and generous free tier make it popular with startups and developers.

Lunary is an open-source LLM observability platform for monitoring AI applications in production. It provides request tracing, cost tracking, user analytics, and prompt management with a clean dashboard. Lunary can be self-hosted for data privacy and offers a managed cloud option.

**Starting Price**

Open Source

**Starting Price**

$0 Per month

**Free Trial**

No

**Free Trial**

Yes

**Free Version**

No

**Free Version**

Yes

**Website**

[langfuse.com](https://langfuse.com/)

**Website**

[lunary.ai](https://lunary.ai/)

## Key features

Core capabilities each platform advertises.

Langfuse

- Open-source LLM observability
- Detailed trace and span tracking
- Prompt management
- Evaluation scoring
- Self-hosted and cloud options

Lunary

Data not available

## Strengths and tradeoffs

What each tool does well, and the limitations to keep in mind.

Langfuse

**Pros**

- Fully open-source with MIT license and free for commercial use with no usage limits
- Acquired by ClickHouse in January 2026, providing strong backing and future investment
- Active development with strong community support and comprehensive documentation
- Transparent pricing model based on units rather than complex metric calculations
- Deep integrations with major frameworks like LangChain, OpenAI, and LlamaIndex

**Cons**

- Recent acquisition by ClickHouse may lead to platform changes and strategic shifts
- Smaller team of 7 employees may impact support capacity
- Enterprise pricing at $3,450-$5,700/month can be expensive for mid-sized teams

Lunary

**Pros**

- Production-ready platform
- Good performance
- Active development
- Strong features

**Cons**

- Enterprise pricing varies
- Setup complexity
- Learning curve required

## Langfuse or Lunary — which should you choose?

Choose Langfuse if you want:

- Self-hosted LLM monitoring
- Open-source tracing for AI applications
- Prompt versioning and management
- Cost tracking across providers
- Community-driven observability

Choose Lunary if you want:

Data not available

## Compare Langfuse and Lunary on your own traffic

10K Free traces/mo

500+ Models

5 min Setup

Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 500+ models through one gateway.

[Try Respan free](https://platform.respan.ai/)