We use Slack every day. It is without a doubt a mighty collaboration tool with millions of users around the globe. It’s an incredibly smart platform that is user friendly on both mobile and desktop devices.
Slack allows for the sending of direct messages and files to a single person or a group of employees, and there’s the ability to organize conversations into different channels (perhaps for specific projects, one for technical support, general chat, and so forth).
The app also supports video calling. You can use the feature to talk to your colleagues about projects and work in-depth, without having to type everything into a direct message.
While it’s not a replacement for cloud storage services, you are able to drag, drop to quickly share files with your colleagues directly within Slack.
To round things off, Slack even has a free version, although unsurprisingly it has limitations (in terms of the number of messages stored, overall storage space, and so forth).