When comparing Signal vs Jami (formerly GNU Ring, SFLphone), the Slant community recommends Jami (formerly GNU Ring, SFLphone) for most people. In the question“What are the best Skype alternatives?” Jami (formerly GNU Ring, SFLphone) is ranked 7th while Signal is ranked 12th. The most important reason people chose Jami (formerly GNU Ring, SFLphone) is:
Calls have crystal clear audio.
Ranked in these QuestionsQuestion Ranking
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 SMS/MMS support
Signal can be your default SMS/MMS text messenger. Encryption is not possible when sending SMS to your contacts, however.
Pro Supports encrypted group chats
Pro Recommended by Edward Snowden
Edward Snowden uses this messenger and recommends it to everyone who is concerned about his privacy.
Pro Supports sharing of various different media types
Signal supports: emoji, pictures, videos, audio, contacts, any location and GIF.
Pro Message mirroring on Signal Desktop
Signal Desktop is a Chrome extension that allows you to mirror messages from your phone, including replying.
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 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 Crystal clear audio
Calls have crystal clear audio.
Pro Free and open-source code
Contribute to and/or audit the source code here.
Pro Video conferences
Make audio and video calls with multiple people on Jami. Easily add new participants. Because Jami does not rely on servers, the conference is hosted by the device of the person who initiates it. It mixes the audio and video feeds from all the participants and sends it back to them so everyone can see and hear each other. For this reason, the maximum number of participants depends on the hosting device's computing power and available bandwidth. The developers have tested video conferencing with up to sixteen members; however, it could potentially go higher.
Pro Screen sharing and media streaming
You can change the source of the video feed you send your friends during a call, allowing you to share either your entire screen or only sections. You can also stream any audio and video media files, allowing your friends to see or hear them without having to transfer them first. This is accessed by right-clicking on the screen during a call.
Pro 4K/UHD video calling
If your device has a 4K camera, you can use it to its full potential with Jami thanks to the support for Ultra HD resolution. It is only really useful if the other person has a 4K screen, but if it's the case, they will see you as clearly as if you were there.
Pro Audio and video messages
Record and send audio and video messages. This is convenient for when you want to send a quick message without typing.
Pro Active project
Active community with frequent articles posted on their blog.
Pro Works without Internet access
If required, works within a Local Area Network (LAN) without the need for an Internet connection.
Pro Open development
The Jami software has many features and is stable; yet, the rate of development is increasing as more developers are contributing to provide even more features while keeping the software stable.
Pro No central server required
If there is a wired and/or wireless connection between the caller and receiver, you can make a call.
Pro Language support
Translated into many languages and open for more translations.
Pro SIP support
Answer and make VoIP telephone calls from anywhere in the world where you are connected to the internet.
Pro Intercom calls and file transfers between devices
The same account can be setup on multiple devices. You can then make calls between the same account on different devices. You can also transfer files between devices without using third-party services (like email accounts).
Pro File sharing
Send files of all sizes between Jami users. FLAC, GIF, JPEG, JPG, MKV, MP3, MP4, OGG, PNG, WAV, WEBM and WEBP file extensions are automatically downloaded.
Pro Cross platform support (computers, smartphones and televisions)
Works with devices running Android, Android TV, GNU/Linux, iOS, macOS and Windows operating systems.
Pro Supports multiple accounts
You can have multiple Jami and SIP accounts active concurrently.
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 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.
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 If SMS/MMS imported, other apps can't read SMS
For those using Join, Pushbullet, or similar apps to send and receive SMS/MMS from web or desktop, putting your SMS in Signal somehow breaks this functionally. The dev is aware but plans to remedy the situation have not been named a priority
Con Uses message mirroring
Con Rename contact/conversation
Unable to rename a contact/conversation in the list.
Con Chat history shared across devices
Con Group text chat
Not yet supported; however, group video conferences are supported.