For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Cliengo - Cliengo is a Chatbot platform that converts the website visitors into qualified leads.
Dropbox - Online Sync and File Sharing
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.
Google Drive - Access and sync your files anywhere
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Mega - Secure File Storage and collaboration