LangFuse vs LangSmith

LangFuse and LangSmith are both great platforms for building AI apps. We are building Lunary to be the best observability and monitoring tool for AI chatbots. We added it to the comparison below so you can get an idea of how it compares.

Quick look

What people dislike about LangFuse and LangSmith

LangFuse

Confusing dashboard
Higher starting price for Pro plan
No chatbot analytics features
Features missing in the self-hosted version
Lack of privacy features for data-sensitive companies

LangSmith

Super confusing dashboard
Requires a lot of configuration
Complicated integration outside of LangChain
Enterprise plans start at $75k
No support for startups and individuals

Pricing

Pricing comparison

	LangFuse	LangSmith	Lunary
Pro plan begins at	$59	$39	$20

Features

LangFuse vs LangSmith: side by side

	LangFuse	LangSmith	Lunary
Open Source The source code can be reviewed and people can contribute to it.	✅	❌	✅
Self Hostable Deploy on your own infrastructure to maintain full control over costs and data privacy.	✅	⚠️ Only for very large companies on 6-figure plans.	✅
1-line Integration Get started in 2 minutes reporting data.	✅	⚠️ Only for LangChain	✅
Prompt Playground Experiment and play with prompts in the dashboard.	✅	✅	✅
Prompt Templates Manage prompt templates with versioning.	✅	✅	✅
Chat Replays Replay user conversations and interactions with your chatbot.	❌	❌	✅
Analytics Track your LLM usage with analytics.	✅	✅	✅
Topic Classification Classify conversations into topics.	❌	❌	✅
Agent Tracing Debug LLM agents with powerful nested tracing.	✅	✅	✅
Custom Dashboards Create custom dashboards to share insights with your team.	❌	✅	✅
Score LLM responses Easily score conversations in 1 line of code based on custom criterias or evaluation metrics.	✅	✅	✅
PII Masking Automatically mask PII data in your conversations while keeping all the data local.	❌	⚠️ Requires custom code and complicated configuration.	✅
User Tracking Identify and review conversations from each user.	⚠️ Basic identification capabilities.	❌	✅
Feedback Tracking Collect feedback directly from your users.	✅	✅	✅
Bootstrapped The company cares more about customers than investors.	❌	❌	✅

Trusted

Lunary customers and usecases

Because Lunary is a flexible, customizable, and reliable solution, we have customers all the way from 2-person startups to billion dollar companies like DHL and Bandwidth.

5000+ AI developers at top companies build better with Lunary