What is the difference between famous mobile messengers?

Question

Messengers

Can you explain to me, far from the mobile industry, how functionally, for the end user, the well-known mobile messengers differ - Viber , Snapchat , WhatsApp , Telegram , etc. -? If possible, identify two or three features that distinguish it favorably for each messenger.

Answer 1

ICQ is faster, more stable and without ads, but Skype is more popular, somewhat more convenient and has more features.
I remember some tasks from school textbooks, who studied at the university, they will remember from the university, but here you are not a university and you are not a teacher, but you are waiting for you to do a market analysis for free!

Answer 2

In fact, this is just a good upgrade of the existing ICQ. In fact, these messengers help to make a person more mobile.
Of the main advantages, I would single out the following:
1. If you have a good Internet connection, you can always stay in touch and call other subscribers (much cheaper compared to cellular communications).
2. Constantly something is being finalized.
3. Cross-platform. Can be installed on mobile and computer.
Of the shortcomings:
1. Updates sometimes come terrible (the messenger freezes, then it doesn’t work, I don’t understand how).
2. Strange update scheme. If I don't want to update the messenger to a new version,
it will be updated automatically next time I start it
3. Wishlist users are not taken into account. For example, I wanted to change the sound to another, unfortunately the developer has not grown up to this.