CommentHound — Google Sheets comment thread aggregator

Turn scattered comment threads in big Google Sheets into a trackable, handoff-ready task list

Problem

Someone on HN described collaborating with up to 50 people in a single Google Sheets workbook, with 70+ comment threads spread across multiple tabs. As the sheet owner, they had no way to see which questions were still unanswered or which risks were already resolved. Comments are buried per-cell and per-tab, so handoff becomes nearly impossible.

Solution

Pull every comment thread across all tabs of a workbook via the Google Sheets API (or a manual export), then group them by status—unanswered, resolved, threads I participated in—and let owners assign, tag, and export a handoff checklist. The goal is not real-time collaboration but a clear view of unclosed loops.

Users

Project managers, ops people, and consultants who maintain large Google Sheets workbooks, plus anyone inheriting someone else's spreadsheet

MVP

OAuth into one Google Sheet and scan all tabs; group comment threads by status; mark resolved or assign; export open items to CSV or Markdown; scheduled refresh

Revenue

Monthly subscription per workbook or per seat, with a low-priced personal tier and a per-user team tier; alternatively a one-time purchase desktop app

Why now

Google Sheets comments are widely used but there is almost no cross-tab overview, and AI now makes scraping, classifying, and summarizing comments cheap enough for a solo developer to ship a focused tool