When comparing iMessage vs Wire, the Slant community recommends Wire for most people. In the question“What are the best Skype alternatives?” Wire is ranked 2nd while iMessage is ranked 6th.
Ranked in these QuestionsQuestion Ranking
Pro Comes pre-installed
No need to download or sign up for a new service
Pro Clean UI
UI is minimalistic, and clear. And there is a plethora of stuff on the left of text box if you wanna use them.
Pro Cross-platform within Apple ecosystem
iMessage is available on iPhone, iPod, iPad, and Mac.
Pro Friends don't need to "sign up"
You can just message them using their existing phone number or Apple ID and they will get your message.
Pro Free and unlimited messages over Wi-Fi and data
Messages clearly indicates whether messages are being sent over iMessage (blue) or SMS (green) where messaging rates apply. iMessages do not count as SMS messages with your carrier, instead they use a negligible amount of data to send over Wi-Fi and cellular data networks.
Pro Supports voice messages
Short voice recordings/messages can be quickly sent, and messages can be easily dictated into written messages as well.
Pro Clear indicators for message delivery and receipt
The app indicates when messages have been sent, when they have been read, and when someone is typing.
Pro Secure end-to-end encryption
Pro Seamlesss switching between SMS messages
Pro Libre/open source
Pro End-to-end encryption
Pro Clean, modern interface
Pro Swiss legislation
Registered in Switzerland.
Pro Completely free for private use
Check out their pricing. It cannot be cheaper for secure private communication.
Pro Intuitive user interface
Wire's user interface is quite intuitive to use, still it has everything required for a complete experience. Settings are very clean and allows you to turn on/off some features which might be disturbing for some, like link previews and emoji conversion.
Con Not cross-platform
iMessage is not available on anything but Apple devices.