What are some alternatives?
When comparing CellSend and SuperBeam, you can also consider the following products
Pushbullet - Pushbullet - Your devices working better together
Send Anywhere - Send whatever you want, wherever you want
Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
AirMore - AirMore is a cross-platform toolset that can help you manage any Android device wirelessly.
SHAREit - SHAREit allows you to transfer files and data from your phone to another device without having to rely on WiFi or a data plan.