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Sidenote
Chat with any doc in your browser — every answer cited
An AI reading assistant in your browser. Ask any PDF, doc or wiki a question — Confluence, Notion, Google Docs, arXiv — and every answer cites the exact passage. Click a citation, the page scrolls to it. If the doc doesn't answer, it says so.
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. 👇
About Sidenote on Product Hunt
“Chat with any doc in your browser — every answer cited”
Sidenote was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #153 on the daily leaderboard. An AI reading assistant in your browser. Ask any PDF, doc or wiki a question — Confluence, Notion, Google Docs, arXiv — and every answer cites the exact passage. Click a citation, the page scrolls to it. If the doc doesn't answer, it says so.
On the analytics side, Sidenote competes within Chrome Extensions, Productivity and Artificial Intelligence — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how Sidenote performed against the three products that launched closest to it on the same day.
Who hunted Sidenote?
Sidenote was hunted by Lewis Hadden. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Sidenote including community comment highlights and product details, visit the product overview.
Lewis Hadden
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. 👇