What the Heck is SmithDB?
Introduction
If you have spent any time building with LLMs over the last couple of years, you have probably heard of LangChain. Their open-source framework for building LLM applications is one of the most popular in the space, and their commercial product, LangSmith, is a platform for observing, evaluating, and deploying agents. What you might not have heard about yet is SmithDB, which LangChain announced at their Interrupt conference on May 13, 2026. It is a purpose-built distributed database for agent observability, and it solves a problem that I think a lot of people building production agents are going to recognize immediately.
The problem statement is basically that agent traces have gotten too big and too complex for general-purpose databases to handle well. When LangSmith first launched in 2023, most people were building simple RAG pipelines and prompt chains. The traces generated by those applications were small...
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