What are some alternatives?
When comparing CellSend and Tresorit Send, you can also consider the following products
Pushbullet - Pushbullet - Your devices working better together
Cryptee - Cryptee is a zero-knowledge, encrypted photos, documents, files, notes and journaling platform. A unified place to safekeep your data without worrying about losing your privacy.
Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
Crypho - End-to-end-encrypted messaging and file sharing
AirMore - AirMore is a cross-platform toolset that can help you manage any Android device wirelessly.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.