Langsmith

• It's a Langchain Addon
• https://www.langchain.com/langsmith/observability
• https://eu.smith.langchain.com/
• It's an observability and debugging toolkit
• It's an external paid service
• All you need to do on your langchain project is to configure the proper envs

• UI: https://smith.langchain.com/public/8d58a192-1231-4e47-8fe9-5b2affc5c526/r/876e2229-801f-4548-a17e-6a5569bd2808

• Open source alternatives:

• Langfuse

Installing & Configuring

• No additional package needed!

pip install langchain langchain-<provider>

LANGSMITH_TRACING=true
LANGSMITH_PROJECT=hello-world
LANGSMITH_API_KEY=lsv2_pt_...