Gem Space: blogs, chats, calls

Communication

4.5

Slack

Business

3.6

WhatsApp Messenger

Communication

4.3

Rakuten Viber Messenger

Communication

4.4

Email - Spike mail

Productivity

4.2

WeChat

Communication

3.6

KT Messenger (KalamTime)

Communication

3.9

Skype

Communication

4.1

Botim - Video and Voice Call

Communication

4.4

Zangi Private Messenger

Communication

4.3

LINE: Calls & Messages

Communication

3.4

Threema. The Secure Messenger

Communication

4.1