When it comes to messaging apps and services, there are a fair few stalwart apps you'd expect to see brought up in conversation. Facebook Messenger and WhatsApp are obvious. Despite many people hating the primary platform, both offshoots have seen great commercial success and now boast billions of users. If you're messaging someone in 2021, there's a very high chance you're using one of those. Then there's Signal and Telegram, a pair of apps interlinked only by their focus on privacy and their shared desire to topple the duo at the top. Finally, there's iMessage and Google Messages, one of which has succeeded at being the default message service for all users on its platform, and the other of which hasn't gotten its message out on why you should use it.