I've found https://www.securemessagingapps.com https://www.securemessagingapps.com to be an interesting source of comparison. The author seems to actively updat

I've found https://www.securemessagingapps.com https://www.securemessagingapps.com to be an interesting source of comparison. The author seems to actively update it based on crowd-submissions. There's also http://öä.eu/bac.html http://öä.eu/bac.html (based on http://öä.eu/bac.pdf http://öä.eu/bac.pdf thesis) but I've emailed with the author and he said that he's not keeping it up to date.