An infinite canvas
Lay your ideas out on a whiteboard with no edges. Arrange, group, and connect cards the way your mind actually works.
Free to start — no credit card
Where reading becomes thinking.
Samong is an infinite whiteboard for your knowledge. Pull highlights out of PDFs, link ideas as cards, and map what you know — visually.
Free plan included · Pay by card or PromptPay QR · Cancel anytime
Think in space, not in lists.
Notes apps store what you read. Samong shows you what you think.
Cards that link like neurons
Every note is a card. Connect them with [[wikilinks]] and watch a knowledge network grow out of your reading.
From PDF to insight
Read papers and books inside Samong. Highlight a passage or a region, and it becomes a card — with a link back to the exact page.
AI that reads with you
Turn a PDF into a mindmap or a summary, or chat with it and get answers cited by page — and save any answer as a card with one click.
Mindmaps that build themselves
Branch ideas into auto-laid-out trees. Restructure a whole branch with one drag.
Real-time collaboration
Think together on the same whiteboard. Every change syncs live, conflict-free.
Installs like a native app
Add Samong to your desktop and mobile home screen — a real app window, one click away.
Questions, answered.
What is Samong?
Samong is a visual knowledge management app: an infinite whiteboard where your notes, PDFs, and ideas live as connected cards. "Samong" (สมอง) means "brain" in Thai.
How is it different from Notion, Obsidian, or Heptabase?
Notion organizes documents in pages; Obsidian links text files. Samong — like Heptabase — is spatial: you see your ideas laid out on a canvas, linked like a map. Samong adds PDFs as first-class sources, runs in the browser on any device as an installable app, speaks English and Thai, and has a free plan.
What are AI credits?
Samong can turn a PDF into a mindmap, summarize it into a card, or answer questions about it. Each AI action spends credits from your monthly allowance — Free includes 10 a month, paid plans 500. Short documents cost 1 credit; longer page ranges cost a little more (up to 4 for ~100 pages), always shown before you spend. You pay for the pages you actually asked for, scanned books included — 25 pages is one credit whether the file holds text or images. On Pro you can also summarize a PDF chapter by chapter from its table of contents — that spends credits per chapter, and the chapter picker totals them up before you start.
Can I pay without a credit card?
Yes. In Thailand, Pro is available as a one-time pass paid by PromptPay QR — ฿790 for 3 months, ฿1,390 for 6 months, or ฿2,490 for the year. The longer the pass, the less you pay per month: a year works out 21% cheaper than buying 3 months at a time, and saves you ฿670. No card involved, and it renews only when you choose to scan again. Prefer a card? Pro is also a regular subscription in USD, monthly or yearly, cancel anytime.
Who owns my data?
You do. Everything you create stays yours, and you can export your whiteboards as PNG, SVG, or PDF anytime.
Your knowledge has a shape.
Stop scrolling through notes. Start seeing how they connect.