What are some alternatives?
When comparing Keybase for Mobile and MagicPad, you can also consider the following products
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Send - Instant messaging meets email (by Microsoft)
MyChat - Secure instant messenger for any network
Keepsafe Unlisted - Protect your phone number, private texts and calls
Wickr - Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
Google Cloud Dataproc - Managed Apache Spark and Apache Hadoop service which is fast, easy to use, and low cost