When comparing Cryptomator vs Signal, the Slant community recommends Signal for most people. In the question“What are the best tools/apps/extensions to help keep my data private?” Signal is ranked 4th while Cryptomator is ranked 5th. The most important reason people chose Signal is:
Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free and open source
Pro Transparent encryption
Pro Works with any cloud platform
Works with any cloud-based services, including Dropbox and Google Drive.
Pro Fast encryption and decryption
Pro Virtual hard drive file access
Drag and drop.
Pro Client-side
No accounts. No backdoors.
Pro AES individual file encryption
Pro Passphrase bruteforce protection (scrypt)
Pro Multi-platform
Available for Windows, Mac and Linux on desktop and iOS, Android for mobile.
Pro Provides security and privacy
Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.
Pro Free and open source
Signal is free and open source software, enabling anyone to verify its security by auditing the code. It's the only private messenger that uses open source, peer-reviewed cryptographic protocols to keep your messages safe.
Pro Supports encrypted group chats
Pro Has a desktop app
Signal Desktop can be used on multiple devices and has most features of the Android version, although it still requires you to register with your phone.
Pro Supports sharing of various different media types
Signal supports: emoji, pictures, videos, audio, contacts, any location and GIF.
Pro Note to Self feature
Allows you to "send: messages to yourself and sync to desktop so you can use Signal as a kind of encrypted Pushbullet alternative
Pro You can easily view all media exchanged
You can easily view all media shared in the chat without scrolling back to when it was shared.
Pro Annonymous Sender (Encrypted)
The sender credentials can be encrypted with the rest of the message, leaving only the recipient address readable by the Signal server. Even if Signal wanted they couldn't see who is talking with who by this mean.
Pro Works everywhere in every country
Unlike most messenger apps, Signal works reliably in all countries by securely circumventing internet censorship.
Pro Recommended by Edward Snowden
Edward Snowden uses this messenger and recommends it to everyone who is concerned about his privacy.
Cons
Con Android version is paid
Con Bugs with deleting of files
Sometimes files cannot be deleted and there is no working solution/fix available yet
Con Current WebDAV is a buggy on Windows
The used WebDAV implemention shows wrong available capacity and has a limitation in the file size. The developers are aware of these problems and working on a better solution.
Con Compatible with Android versions 4.3 and up only
Con Slower speeds
Encypting speeds are slower then regular uploads, larger files particularly video files often cannot complete transfer without errors.
Con No camera upload functionality
Cannot automatically back up photos on mobile devices replacing the need for Google drive or iOS fully. User then has to go and either manually select photos for upload or use cloud service and then encrypt defeating the purpose on mobile clients.
Con Needs access to your phone number and contacts to work
Con Single device
Signal can only be registered to one mobile device at a time. But you can link Signal to Signal Desktop.
Con Servers hosted in the US
A security risk due to National Security letters, which require giving up data to the US state, and making it illegal to disclose that.
Con Unreliable notifications
Sometimes messages won't be received if the Signal app has been closed for a long time or hasn't been opened after booting the device.