Closed source is a definite dealbreaker: how do I know there aren't horrible flaws in their cryptographic protocols? Short of reverse engineering their binaries

Closed source is a definite dealbreaker: how do I know there aren't horrible flaws in their cryptographic protocols? Short of reverse engineering their binaries there's not you can do. The features AeroFS provides seem incredibly similar to what you can get from open source alternatives, for example the Tahoe-LAFS distributed encrypted filesystem and Duplicati: Tahoe: http://www.tahoe-lafs.org/ http://www.tahoe-lafs.org/ Duplicati: http://www.duplicati.com/ http://www.duplicati.com/ (can store data to Tahoe-LAFS)