When comparing Ripcord vs ScudCloud, the Slant community recommends Ripcord for most people. In the question“What are the best Slack clients for Linux?” Ripcord is ranked 3rd while ScudCloud is ranked 4th. The most important reason people chose Ripcord is:
It provides a traditional compact desktop interface designed for power users. It's not built on top of web browser technology: it responds quickly to input, sips gently from computer resources, and gets out of your way. It does voice chat, too.
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Pros
Pro Very fast due to not being based on Eletron
It provides a traditional compact desktop interface designed for power users. It's not built on top of web browser technology: it responds quickly to input, sips gently from computer resources, and gets out of your way. It does voice chat, too.
Pro Compact app which uses less than 20 MB of ram
Very low RAM Usage compared to official slack app
Pro Tab layout allows for better organization of conversations
The addition of tabs along the top makes it much easier to hold several conversations at once.
Pro Has packages for popular distributions
ScudCloud has packages for Ubuntu, Kubuntu, Mint, Debian, Arch, Fedora and OpenSUSE.
Pro Free and open source
It's free and open source, released under the MIT License.
Pro Native notifications
Pro Channel quicklist for Unity
Ubuntu Unity's dock menu (accessed via right-click on icon) allows quickly switching to the needed channel.
Pro Icon badges
Count of undread notifications will be overlayed over the launcher icon.
Pro Lightweight
Installation alone was less than 1MB.
Pro HiDPI Support
Cons
Con Not FOSS
Ripcord is shareware. They have a trial AppImage available, but you have to pay 20 dollars for the full version. Also, you can't recompile it or easily package -- which means it can't be managed by your distro's package manager.
Con Doesn't run properly under Wayland
Con Text selection does not work
Only whole messages can be copied.
Con Unable to identify who sent emoji responses
There is no way to tell who responded with emojis on messages. Sometimes this is actually really important.
Con Very ugly interface on modified system widgets
Con Outdated
Maintenance for this project has diminished, with the native client offering a better experience.
Con Pointless
Uses QtWebkit under the hood, which makes it have no benefit over the official application.
Con Has become fairly heavy
Recent versions experience significantly higher memory usage over time.