Why We All Run Five Chat Apps

01 Nobody chose this. How messaging fragmented — and whether it ever un-fragments.

Check your home screen. There's probably WhatsApp for family, Signal for the privacy-conscious friends, iMessage humming in the background, Telegram for that one community, and Slack — or Teams, or Discord — bleeding in from work. You didn't plan it this way. Nobody did.

Fragmentation happened because no single platform won cleanly. WhatsApp swept up much of the world outside North America, but iMessage locked in the iPhone crowd before anyone else could. Telegram attracted communities that wanted larger groups and looser moderation. Signal became the default for people who read the news too carefully. Each app carved out a constituency, and switching costs — your history, your contacts, your habits — kept everyone in place.

The network effect is the real villain here. A messaging app is worthless without the people you want to reach, which means the app your contacts are already on wins by default. Multiply that logic across different friend groups, countries, and workplaces, and you get five icons on your screen with no natural way to collapse them.

Interoperability — the ability for users on different platforms to message each other — is the obvious fix, and the EU's Digital Markets Act is pushing exactly that, requiring large platforms to open their APIs to third-party clients. Whether the result will be seamless or quietly broken remains to be seen; past attempts at cross-platform chat (remember when Facebook tried to unify SMS?) rarely delivered on the promise.

Until something genuinely shifts, the five-app life is the compromise we live with. The good news, if there is any, is that most of us have stopped noticing. The switching cost now includes the cognitive load of caring.

These notes are part of an ongoing field guide — corrections and additions are welcome at the desk.