Slack is one of the world's leading platforms for team communication, imagine all your team communication in one place, instantly searchable, available wherever you go.

Available for Mac, PC, iOS, and Android, Slack is used daily by tens of thousands of people, including teams at Stripe, Rdio, Medium and Airbnb. Don't be fooled by the name, Slack can help you be more productive by streamlining your work communications.

Threema is a chatting app for mobile devices with a similar interface to Whatsapp. With this tool, you can send images, text messages and GPS locations in the chat. It also syncs all your contact lists so that you can easily find users of the app.

Threema also puts security and privacy first, so you can chat with your friends, family, and team without having to worry about someone else reading your messages.

LINE is a free communication app that allows you to make voice and video calls, send messages, share photos and even communicate through stickers.

With LINE, you can call your friends and family as often as you want, for as long as you want. Also, you can make international voice and video calls for free.

Voxer is a walkie talkie (PTT – push to talk) messenger, and its main feature is voice messages. Like most of the other chat communication apps, you can also send text messages, media files and GPS locations.

Voxer also has a pricing plan for business purposes that can also be used for fast customer support. Voice messaging taken to the next level.

Samepage allows you to write down all the tasks you are working on at the moment and figure out what to do next. You can also work from any device, add text, images, diagrams, videos, maps spreadsheets and make changes as needed.

With Samepage, you can run meetings, manages projects and coordinate events. No more excuses to remain on different pages any more!

Bitrix24 is a free collaboration platform that can help you to keep all your emails, meetings, files and contacts in one place. Besides, this software is a social network for your team where you can share news, discuss everything, and send files.

The features of Bitrix24 cover communication, task and project management, CRM, customer support and eCommerce website creation.

Rocket.Chat is a team collaboration platform created for anyone who needs group chats. It offers audio and video conferencing, screen sharing and real-time automatic translation in more than 35 languages.

With Rocket.Chat, you can control your communication, manage your data and improve team productivity. This app is also scalable and open-source.

With KaKaoTalk, you can send messages for free and make video and voice calls with as many users as you want. It will require your phone number and a verification code when you register.

KaKaoTalk is available for both mobile devices and desktops . It allows you to share files, create a live talk and schedule meetings in your calendar via voice.

JANDI is a team communication tool designed to suit the culture and goals of the Asian market. Used by over 200,000 companies and organizations worldwide, this tool comes with all the features you need in one simple service.

With JANDI, you can assign tasks to yourself and other members, create topic-based chat rooms, and easily manage your files.

RingCentral is a team collaboration and messaging app similar to Slack. It offers features like team messaging, task management, screen sharing, video meetings and notes for text editing in conversations.

Overall, RingCentral is an all-in-one collaboration software that allows you to organize your teams around projects or topics, so you can make sure that everyone is on the same page.

Missive will help you to combine emails and chats into one dashboard. It does not try to move you away from email, but help you to collaborate with SMS and social media.

With Missive, you have everything you need to get your job done. From chats to task assignment, this app will increase your team's productivity.

Jabber by Cisco will cover all your collaboration and communication needs. You can use it for group chats, instant messages, video calls, desktop sharing, conferences and presentations.

With Cisco Jabber, you can communicate and collaborate from anywhere, as it's available for both desktops and mobile devices.

Skype is the world’s best-known app for video calls. Skype has a new updated design that allows you to send messages, images, files to a user, make video and voice calls.

Skype is even more important in a world where Work from Home is becoming normal. You can use it on both desktop and smartphone, but watch out for spammers, who can send you messages.

WhatsApp is one of the most popular chat apps on the planet. It counts over 1 billion active users and offers powerful communication features like voice calls and video calls.

WhatsApp is definitely one of the best options if you are looking for a stable solution for personal use or for business. However, one of the limitations of Whatsapp is that it only allows you to create a group video call of up to 4 members. If you want to have group calls with more people, you will be disappointed.