MarkBook vs. Signal Messenger

Signal is great for high-security applications where privacy is a concern, perhaps because of the sensitive nature of the materials being communicated. For instance, if you are sending sensitive information about a film that hasn't been released yet, and you want to make sure that paparazzi and fans don't get access to spoiler information, Signal is a great way to communicate.

Incentivized

• Encryption end to end
• Audio quality
• Ability to permanently delete messages and history

Incentivized

• Backup functionality on iOS devices
• Sometimes messages can be delayed

Incentivized

I've never contacted support but I see that they are on the ball for bug fixes, highly communicative in release notes, and continually releasing updates to Signal that address common user complaints. Given how responsive the development team is, and how they are continually improving Signal, I think their support is top notch.

Incentivized

Signal is far and away better and more feature-rich. Skype is no longer the app it used to be before Microsoft acquired it, and WhatsApp, while trying to be much like Signal with claims, has too many features that lead to a sense of insecurity as it's too widely used and used for too many things.

Incentivized

• Communication is crucial to accomplishing our mission
• Cost of similar commercial apps could be very prohibitive

Incentivized