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Introducing LangSmith Custom Apps: Build custom interfaces around your agent data

LangChain29 September 2026Watch on YouTube

Part of series

Ep. 11 · LangSmith: agents bouwen & monitoren

Alles over het LangSmith-platform van LangChain voor het ontwikkelen, debuggen en bewaken van AI-agents.

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What you'll learn

  • You learn what Custom Apps in LangSmith are: building, publishing, and running custom UIs directly inside LangSmith, on top of LangSmith data.
  • You see that you don't start from scratch: you build on templates and coding-agent guidance.
  • You learn to create focused UIs for feedback, experiments, traces, and the behaviors that matter most to your application.
  • Enterprise Plan customers can use LangSmith Chat to describe the data they want and how to display it, and turn that into a working app.

Frequently asked questions

What can you do with Custom Apps in LangSmith?
You build, publish, and run custom UIs on top of LangSmith data, directly inside LangSmith. You can also share them inside LangSmith.
Do you have to build a Custom App from scratch?
No, you use templates and coding-agent guidance to build on LangSmith data. After that you publish and share the app inside LangSmith.
What kinds of views can you use Custom Apps for?
You build focused UIs for feedback, experiments, traces, and the behaviors that matter most to your application.
How does creating a Custom App with a prompt work?
Enterprise Plan customers use LangSmith Chat to describe what data they want and how to display it. They then turn that into a working app.

Topics

langsmithlangchainagent observabilitycustom uideveloper tools

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LangChainLangChain

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Description from the channel

We're launching Custom Apps in LangSmith, which lets you build, publish, and run custom UIs on top of LangSmith data and run them directly inside LangSmith. ✅ Create custom interfaces without starting from scratch: Use templates and coding-agent guidance to build on LangSmith data, then publish and share inside LangSmith. ✅ Review agent behavior your way. Build focused UIs for feedback, experiments, traces, and the behaviors that matter most to your application. ✅ Create Custom Apps with a prompt. Enterprise Plan customers can use LangSmith Chat to describe what data they want and how to display it, then turn that into a working app. Get started: https://www.langchain.com/blog/langsmith-custom-apps