Show HN: Tracecast – open-source generative data apps built on top of Marimo

Category: devtools

Tags: data-apps, ai-chat, marimo, langgraph, data-warehouse, nextjs, fastapi, local-first

Score: 7.3/10 (Innovation: 7, Technical: 8, Documentation: 7, Utility: 7)

Tracecast is an open-source platform that uses a Cursor-style AI chat to generate interactive data apps on top of data warehouses, combining Marimo, LangGraph agents, and multiple data connectors. It innovatively decouples exploratory data analysis from finished notebook creation, with a focus on trust and ease of use by hiding edit mode and using a local-first, single-tenant security model. Its architecture includes AES-GCM encrypted credential storage, checkpoint-based chat branching, and a provider-agnostic model adapter, making it interesting for teams wanting AI-assisted dashboard generation with strong security practices.

Target audience: data engineers, data analysts, backend devs

Repository: https://github.com/tracecast/open_data_apps · TypeScript · Apache-2.0 · 3 stars

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