Viber

Viber's listing carries its owner in the product name — Rakuten Viber Messenger — and describes itself as part of the Rakuten Group, which is a clearer statement of who runs it than most listings in this category make. It covers the familiar ground of messaging, calling, communities and channels, and the numbers it gives are specific: group video calls of up to 60 people and group chats of up to 250 members. Its encryption sentence is the most carefully scoped of the four reviewed here, and the qualifier is the part to read.

You send messages, photos, files, voice notes and stickers, and you can call any Viber contact on mobile or desktop, with group video calls of up to 60 people and group call links on the desktop. Group chats hold up to 250 members and come with polls, quizzes, mentions and reactions, and communities and channels are the layer above that, for following topics or building an audience. Viber Out is the paid international calling service, letting you reach landlines and mobiles in supported countries by subscription or by buying minutes.

The messaging and calling half is free and the listing describes it that way, but Viber is also the one of the four that plainly sells something: Viber Out minutes and subscriptions, for calling ordinary phone numbers internationally. That split is stated rather than hidden, which makes it the most honest pricing description in this batch — you can see exactly what the free product does and where the paid one begins.

The encryption claim is the most precisely worded of the four: end-to-end encryption is "on by default for one-to-one chats, group chats, voice calls, and video calls between Viber users". Every part of that sentence is doing work — "on by default" rather than merely available, a list of four things it covers rather than a general claim, and a scope that stops at conversations between Viber users, which says what happens at the boundary with SMS and ordinary phone calls without spelling it out. The rest of the privacy paragraph is a list of controls rather than promises: disappearing messages with a custom timer, hidden chats, editing or deleting messages already sent, and one settings screen to manage it all. What the listing does not describe is moderation, reporting or an age requirement.

People who want messaging, calling and a community layer in one app, and who want the encryption to be on by default rather than a mode to remember to switch on. The Viber Out side makes it a sensible choice for calling ordinary phone numbers abroad, which is a service the other three do not offer at all.

The most precisely worded listing of the four: encryption on by default, scoped honestly to conversations between Viber users, and a paid international calling service described openly rather than buried. Group video calls of 60 and group chats of 250 sit between Signal's smaller limits and Telegram's much larger ones, which is a fair summary of where the product sits. What is missing is the part that matters on a platform with public communities: the listing describes no moderation, no reporting route and no age requirement.