 Briar |
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 iMessage |
 Session |
 Signal |
 SimpleX |
 Threema |
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| Platform | Android | Mac, Windows & Mobile | Apple Devices | Desktop & Mobile | Desktop & Mobile | Desktop & Mobile | Desktop, Mobile & Web | MacOS, Windows, Mobile & Web |
| Privacy | ||||||||
| Open Source |
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| End-to-End Encrypted |
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| Perfect Forward Secrecy |
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| Metadata Protection |
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| No Email Required |
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Requires an email or phone number
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Requires an email or phone number
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| No Phone Number Required |
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Requires an email or phone number
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Requires an email or phone number
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| Independence | ||||||||
| Send Over Bluetooth |
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| Trust | ||||||||
| Decentralized Infrastructure |
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| Convenience | ||||||||
| Voice Calls |
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| Video Calls |
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| Send while recipient is offline |
App can run in the background, but offline receiving is available with Briar Mailbox
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| Message Reactions |
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| Message Reply |
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| Voice Messages |
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| Typing Indicators |
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| Read Receipts |
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| Unsend Messages |
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| Disappearing Messages |
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Only for new chats
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| Schedule Send |
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| Gif Support |
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| Ethics | ||||||||
| Supports Charity | ||||||||
| Carbon Neutral |
No central servers so energy all goes through user's devices
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| Carbon Negative |
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