ChatCairn: searchable local library of AI chats

Turns scattered AI conversations into a searchable, reusable local knowledge base

Problem

Users' AI conversations are scattered across clients and web apps, so finding a past discussion or prompt means scrolling history, and cross-tool search is nearly impossible. Privacy-conscious users won't upload chats to third-party services.

Solution

Import or sync AI chat histories locally, build full-text and semantic search, and retrieve by topic, tag, or prompt snippet. Export prompt templates or Markdown while all data stays on-device.

Users

Heavy AI chat users: developers, researchers, writers, especially the privacy-sensitive

MVP

Import common chat export formats; full-text search and tags; prompt snippet favorites; Markdown export; fully local storage

Revenue

One-time local license at $19-39; team shared library subscription; optional encrypted cloud sync add-on

Why now

AI chat volume is exploding while history management is nearly empty, and trust in local-first tools is rising; a similar Show HN confirms demand and a solo dev can ship fast