When comparing Konsole vs Alacritty, the Slant community recommends Konsole for most people. In the question“What are the best terminal emulators for UNIX-like systems?” Konsole is ranked 5th while Alacritty is ranked 7th. The most important reason people chose Konsole is:
Konsole can bookmark ssh and telnet sessions, directories, and it can open tabs in a folder for easy access.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Directory and SSH bookmarking
Konsole can bookmark ssh and telnet sessions, directories, and it can open tabs in a folder for easy access.
Pro Supports split-view
Konsole supports split-view which splits the window into two (or more) konsole instances. This is very useful for people who work a lot on the terminal and don't want to spend time navigating between different windows or tabs.
Pro True color and Smooth font
Konsole supports true color and smooth font. This made konsole more fanstatic than other terminal emulators.
Pro Embeddable into the desktop
Konsole can be embedded into desktop so it's always easily accessible, but not in the way of other windows.
Pro Export of output in plain text or HTML format
By going to file > save output, you can send all screen output to a text file.
Pro Support in Dolphin file manager
Konsole can be accessed by pressing F4 in Dolphin, which is convenient for when the user needs to open the terminal in a particular spot of the file structure.
Pro Supports font ligature
Most terminals in Linux don't support font ligature, while many modern fonts such as PragmataPro or Fira Code already have decent coverage of font ligature. Support for font ligature makes user experience and font management much easier (i.e. you don't need to keep two copies of the same font just to use in the console)
Pro Helps to identify tabs using custom icons
Users can associate each bookmark or SSH session with a custom icon, thus giving a visual hint to quickly identify a tab when a lot of tabs are open.
Pro Supports advanced color schemes
In particular solarized.
Pro Notification alerts about activity in a terminal
Konsole can monitor activities and notify the user through system notifications when a certain activity happens. This is a very customizable feature too: you can write scripts that can use this feature and notify you for whatever you want.
Pro Exceptionally fast
Konsole is usually very fast. It boots up very quickly and takes less than a second (averages to 0.25-0.59 seconds) to display files of up to 600 MB.
Pro Customize and save profiles
Profiles containing different settings can be created, saved, and loaded. Color schemes, window transparency, scroll bar, key bindings, start-up commands, window border, and menu bar can all be customized according to the user's needs.
Pro Allows CTRL-SHIFT-c/v within WSL Ubuntu as well
Good menu to customize.
Pro Blazing fast rendering with GPU-accelerated
Written in Rust with a philosophy focusing on speed and simplicity, Alacritty is one of the fastest terminal emulators out there.
Pro Looks good
Alacritty looks very slick on Linux, especially with GNOME or i3.
Pro Simple configuration
The configuration file is very well made and easy to use. You can fine tune your preferences to perfection in a matter of minutes.
Pro Comprehensive font options
Alacritty can be configured to adjust line spacing (height), letter spacing (width), and individual character horizontal/vertical positions.
Pro Has support for image previews in w3m and ranger
Pro Has text ref-low when window is resized
Pro Fast and simple but with true color support
It's simple and fast like xterm or urxvt but with truecolor support which is a big plus if you use a terminal based code editor. Basically Alacritty has all the features you need and nothing you don't (if you're using tmux for multiplexing).
Cons
Con KDE Library dependencies
While not an issue if using KDE, when trying to use this terminal in other desktop environments or window managers, there will be a large amount of dependencies tied to the app, making for a large install size. For those trying to keep their desktop lean, this may be an issue.
Con Uses a lot of memory
Although it's very fast, konsole has to use a lot of resources in return. It may use up to 30 MB per instance, depending on the number of tabs and the task at hand.
Con No good support for powerline character even with patched fonts
Con Can mess terminal keybinds
Most the of the time, the terminal keybinds are just ignored to obey the kde keybinds. Can be configured though.
Con Lack of DECSCUSR support
Konsole don't allow changing the cursor shape with extended DECSCUSR sequences, using instead the temporary-profile hack. This causes pain when working in (neo)vim inside Konsole.
Con No support for double-width characters
Konsole no supports double width characters. For powerline users, you need to add a space after powerline glyph.
Con Cannot into ligatures
Alacritty does not support ligatures in Fira Code, Iosevka etc.
Con Unreliable Font Rendering
Like a box of chocolate you never know what you're going to get.
Con Sacrifices basic features for raw performance
The Suzuki GSXR of terminals. Or your ditzy, blonde high school cheerleader; fast and pretty but not a lot going on under the hood.
Eschews a negative developmental philosophy towards including said functionality, with the official reason cited in project documentation as "Not within the realm of a terminal emulator" and ostensibly, "best left up to other tools such as terminal multiplexers" [such as screen or tmux]. Which is unfortunate when you factor in speed against terminal with the functionality built in vs their reliance on 3rd party tools:
tmux on alacritty: 'find /usr' time: 3.234s, cpu: 72%
tmux on konsole: find /usr' time: 1.777s, cpu: 96%
See issue here.
