Hey Product Hunt 👋

I'm Lewis, a solo developer in the UK, and Sidenote is what I've been building.

The itch: most document AI is fluent, confident, and sometimes quietly wrong. You

ask a wiki or a PDF a question, get a clean answer back, and have no real way to know

if it's true. For anything that matters: a runbook, a contract, a research paper - that's worse than no answer at all.

So Sidenote is built the opposite way: every answer has to cite the passage it came

from. The server checks those citations and drops anything it can't ground. Click a

citation and the page scrolls to and highlights the exact line. If the document

doesn't answer your question, it tells you. It won't invent something to fill the gap.

It lives in your browser's side panel and works on whatever you open: Confluence,

Notion, Google Docs, SharePoint, PDFs, arXiv papers, that 14,000-word article you've

been avoiding. Open a doc once, ask questions any time.

Things I care about: your documents are never used to train AI models, everything's

stored in a UK region and encrypted, and every account is fully isolated.

Free tier forever, and a 7-day Pro trial with no card → getsidenote.app

I read every support email myself, so if something's broken or missing, tell me right

here and I'll actually fix it.

What docs do you fight with most? That's what I want to make this great at. 👇