The .io TLD, originally assigned to the British Indian Ocean Territory, has become synonymous with tech startups and developer tools. 'I/O' stands for Input/Output in computing, giving this extension a natural tech association that no marketing budget could buy.
Why .io Is Popular
The tech community adopted .io because 'I/O' is a fundamental computing concept (Input/Output). Google I/O, the famous developer conference, cemented this association. Today, .io signals 'we're a tech company' the same way .com signals 'we're a business'.
Examples
- github.io (GitHub Pages) — GitHub's hosting service uses .io for developer project sites.
- socket.io (Socket.IO) — Real-time communication library — the .io references input/output perfectly.
- atom.io (Atom) — GitHub's text editor used .io to signal its developer-first approach.
- figma.io (Figma) — Design tool that originally used .io before moving to figma.com.
- notion.io (Notion) — Productivity tool that initially launched on .io.
- prisma.io (Prisma) — Database ORM for developers — .io signals technical credibility.