iMessage seems like the WeChat of America. It has a ton of integrations but if you exist in any other part of the world, it really doesn't make any sense to use it, since maybe 1 out of 5 people will be reachable.
SMS is like a spam graveyard where 2FA codes and other regulatory compliance related stuff shows up. SMS is primarily texts from my bank and spammers. Most folks in the rest of the world are using WhatsApp, with the occasional country where Telegram is more popualr.
Messaging with a layer of rich features for billions seems like a hard problem. I'm not sure what iMessage is built on, but WhatsApp is using customized erlang/ejabberd and Telegram is its own golang MTProto stack. Each probably handle millions of connections on FreeBSD or something I suspect.
SMS is like a spam graveyard where 2FA codes and other regulatory compliance related stuff shows up. SMS is primarily texts from my bank and spammers. Most folks in the rest of the world are using WhatsApp, with the occasional country where Telegram is more popualr.
Messaging with a layer of rich features for billions seems like a hard problem. I'm not sure what iMessage is built on, but WhatsApp is using customized erlang/ejabberd and Telegram is its own golang MTProto stack. Each probably handle millions of connections on FreeBSD or something I suspect.