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Subcanvas

Whiteboards inside whiteboards, with notes in every box

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Paste a public GitHub repository, or connect GitHub for private ones, and Subcanvas draws a box for each main folder, with that folder's README inside. Double-click any box or arrow to open the whiteboard or page inside it, as deep as you need. Add asubcanvas file to say what connects to what, put a public diagram in your README, or let an AI agent like Claude Code edit it with you. It works for class notes and plans too. Open source, and free for one person; Pro is $5 per editor a month.

PH · launched Oct 20, 2026 · 2 upvotes (top 22%) · 0 views

Niche: collaborative digital whiteboard software · 43 launches, 3 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Workflow automation
  • Prosumer
  • Not AI
  • Commercial product
  • Productivity
  • Open Source
  • Developer Tools
  • GitHub

Visit website ↗ Source listing ↗

More like this: all 43 launches in collaborative digital whiteboard software →

Could you build this?

Yes It reads a public GitHub repo via the API, lays out folder boxes with README content, and provides a canvas UI, all standard web work.

Competitors

Other products that read as similar to this one : 113 launches clear the similarity bar, closest 8 shown.

Attention rank: #28 of 114 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 352 days after the earliest competitor.

  • teaching-github_pages · github · 2026-10-03 · 21 upvotes · similarity 0.47
  • Whiteboard (YC W26) · hn · 2026-09-24 · 421 upvotes · similarity 0.45
  • teacheryo-whiteboard · github · 2026-09-15 · 8 upvotes · similarity 0.44
  • xdraw · ph · 2026-11-06 · 2 upvotes · similarity 0.42
  • LetDraw · ph · 2026-09-12 · 1 upvotes · similarity 0.42
  • VoidCanvas · ph · 2026-10-29 · 3 upvotes · similarity 0.42
  • Noteboard · ph · 2026-10-02 · 1 upvotes · similarity 0.41
  • Forkstorm · ph · 2026-11-14 · 1 upvotes · similarity 0.41

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.