A private wiki for founders
Where founder ideas become a living brain.
Capture ideas, decisions, links and todos in seconds. Find them months later. Link entries together so context compounds instead of evaporating.
How it works
Three habits, one notebook.
Capture in seconds
Press n anywhere to open a capture sheet. Title and a few lines is enough — Telegram works too.
Link as you write
Type [[ to reference any other entry. Backlinks appear automatically so context follows you forward.
Find anything later
Filter by type, status, tag, project, or wiki link. Save the views you live in.
Built for founders who already use Telegram, Bear, or Obsidian — and want a single place that's actually theirs.
FAQ
Common questions.
Is my data private?
Yes. jac.wiki is invite-only and entries are private to your account. You can export everything as Markdown plus a JSON manifest at any time.
Can I import from Bear or Obsidian?
Yes. Drop a folder of Markdown files into Settings → Import — Bear and Obsidian formats are auto-detected, and tags, frontmatter, and wiki links are preserved.
Does it work on mobile?
Capturing on mobile is best done through Telegram — link your account once and any message you send to the bot lands in your inbox to file later.
Do I need to know Markdown?
No. The editor accepts plain text and lets you reach for Markdown when you want it (slash menu, image paste, [[wiki links]]).
Can I share an entry?
Yes. Each entry can have one or more public links with optional expiry, watermarking, and access counts. Revoke at any time.