Franz (https://meetfranz.com/) - messenger for chats and social networks
It allows you to exchange messages in a single window without switching between messengers.
Franz supports many business and personal messaging and chat services such as Slack, WhatsApp, WeChat, Messenger, Telegram, Google Hangouts, Skype, Zendesk and many more (https://meetfranz.com/services).
In addition, you can create multiple accounts for each service. For example, connect your personal and corporate accounts at the same time.