So Long, .io: The Internet's Favorite Startup Address Is Getting Evicted
For about fifteen years, if you wanted to signal "we are a Serious Tech Company" without paying for a .com, you bought a .io. It was short, it read like input/output, and it was available. Notion had one early on. Half the YC batch you've heard of still does.
Now the whole thing is scheduled to die, and the startups that live there are finding out what happens when your brand is built on someone else's country code.
Quick refresher: what .io actually is
The .io domain was never meant for startups. It's the country-code top-level domain (ccTLD) for the British Indian Ocean Territory — a Chagos Archipelago territory that most residents were removed from decades ago. The UK agreed to hand the territory over to Mauritius, and ICANN's rules say ccTLDs are retired when the country codes they're based on cease to exist. That process has a timeline now. When it completes, .io domains stop resolving.
This isn't a rumor or a maybe. It's the boring, mechanical consequence of a treaty.
The migration problem nobody budgeted for
Here's what makes this messy: moving a domain isn't just an engineering task, it's a brand amputation.
Startups are looking at a checklist that reads like a small nightmare. Every printed business card, every podcast ad read by a host who says "dot I-O" out loud, every GitHub repo, every email address baked into a decade of CRM records. Redirects help with the technical side, but email domains are brutal — change your address and you spend months fighting spam filters that don't trust you yet.
And then there's search. Google has generally treated ccTLDs as geo-signals, and while modern handling is murkier, plenty of SEO folks are advising founders to treat the move as a site migration with full precautions: change-of-address filings, redirect maps, watching Search Console like a hawk for the first quarter after the switch.
The squatter gold rush
The part that should genuinely worry founders: expiring domains get sniped. Professional domain investors watch expiry lists the way day traders watch tickers, and premium .io names — short, pronounceable, brandable — are exactly the kind of asset that gets picked up and resold at 100x the renewal fee.
If your company lets its .io lapse during the transition chaos, or if you abandon it without locking down the successor domain, you're handing a phishing kit to whoever's watching. Fake login pages on your old domain, sent to your actual customers. That's not hypothetical; that's how domain-based phishing works, and the .io retirement creates a wave of expirations all at once.
The bigger lesson
The .io situation is a warning shot for anyone building on infrastructure they don't fundamentally own. It's the same logic as building your entire audience on a platform that can change its API pricing overnight — except here, the platform is a geopolitical agreement signed decades before your seed round.
There are other borrowed ccTLDs in the same boat. .ai (Anguilla) is having its moment right now, and Anguilla is not going anywhere soon, but the .io story is a reminder that "soon" in domain terms is measured in treaties, not quarters.
If you're a founder with a .io in your portfolio, the move is simple even if it's not fun: pick your new home, start the migration while there's still runway, and keep the old domain alive as long as it resolves. If you're just a person who likes watching the internet's fashion cycles play out — and honestly, that's most of us — this is one of the more interesting slow-motion stories of the decade.
The startups will survive. Some of them will even get good migration stories out of it. But the era of the .io as the default tech flex? That's winding down, one treaty at a time.
