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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.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Dropbox - Online Sync and File Sharing
Twilio - Brings voice and messaging to your web and mobile applications.
Google Drive - Access and sync your files anywhere
WAuth.in - Simplifying SMS OTP-less authentication with the power of WhatsApp.
Mega - Secure File Storage and collaboration