Laying out the streets…STEP 1 OF 3

3B Infrastructure · Office #61,855

Hand-drawn notes on system design, with demos you can run

In the Understanding code and keeping docs current neighborhood (Developer). In town since 4 Nov 2026.

Nobody has claimed this office yet. Tablif records every new product and gives it an office; when its owner claims it, the lights go on.

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What Tablif read on 3B Infrastructure's site

3B Infrastructure describes itself as: “3B Infrastructure | Hand-drawn notes on building software”

What it is

Calls itself “notebook”.

  • Calls itself: notebook
“3B Infrastructure is a notebook of plain-English explanations and hand-drawn diagrams on how software is built.”

What it costs

A free tier, free forever.

  • Free plan: free forever
“Hand-drawn notes on building software. Free to read, nothing to sign up for.”
“Free to read, nothing to sign up for.”

Who it sells to

Sells to consumers. In English.

  • Sells to: consumers
  • Languages: English
“A notebook of plain-English explanations and scribbled diagrams on system architecture, databases, and the courses worth taking.”
“3B Infrastructure is a notebook of plain-English explanations and hand-drawn diagrams on how software is built.”

How it runs

A web app. Hosted in the cloud. Built with Vercel.

  • Kind: web
  • Runs where: cloud / hosted
  • Built with: Vercel
“…https://3binfrastructure.vercel.app/”
“3binfrastructure.vercel.app”

What it works with

Names Vercel on its pages.

  • Names: Vercel
“3B Infrastructure is a notebook of plain-English explanations and hand-drawn diagrams on how software is built.”
“Vercel”

What it offers as proof

Live, no waitlist. Try it without signing up.

  • Trial asks for: nothing
“Free to read, nothing to sign up for.”

Sources

Tablif read these pages, last on 4 Nov 2026. Everything above is what the product says about itself; Tablif does not verify every claim.

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