Lunary is a modern LangSmith alternative

LangSmith is a complicated and expensive tool changing every week, weighed down by legacy features you won’t use.

We are building Lunary to be the best monitoring tool for AI chatbots. It’s cost‑effective and quick to set up.

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Quick look

Why people prefer Lunary over LangSmith

Lunary

Open-source
Beautiful & modern UI
Stable product
Centered around chatbot usecases
Stellar support for everyone
Bootstrapped company

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

Lunary is less expensive than LangSmith

	LangSmith	Lunary
Pro plan begins at	$39	$20

Features

LangSmith vs Lunary: side by side

	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.	❌	✅
Feedback Tracking Collect feedback directly from your users.	✅	✅
Bootstrapped The company cares more about customers than investors.	❌	✅

Migrate from LangSmith to Lunary

Currently a LangSmith customer? We've made it easy to migrate to Lunary.
We can migrate all of your data from LangSmith to Lunary within 72 hours. Reach out to us to get started.

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Trusted

Lunary customers and usecases

LangSmith is a solution for bigger companies, and they’ve got the rooster to prove it. Because of the complexity, they’re not a good fit for smaller businesses and startups.

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