When comparing Fantasque Sans Mono vs Hack, the Slant community recommends Hack for most people. In the question“What are the best programming fonts?” Hack is ranked 8th while Fantasque Sans Mono is ranked 28th. The most important reason people chose Hack is:
Hack is free for unlimited commercial and non-commercial use. The webfonts are hinted (TrueType instruction set) to optimize display on the screen and are built into all commonly used web font formats with each new release. They include the complete release character set and smaller (filesize) basic Latin subset releases. They are available in the [build directory](https://github.com/chrissimpkins/Hack/tree/master/build) of the repository.
Ranked in these QuestionsQuestion Ranking
Pro Italics look good
The handwritten-style italics of Fantasque Sans Mono are quite attractive.
Pro Open source
Fantasque Sans Mono is open source, meaning it can be freely used, changed, and shared by anyone.
As a "Mono" font, Fantasque is uniform in size and overalls. However, if you look further into all characters, you'll find that there's almost no pattern between them - except for the huge amount of curves. That said, this font is a very strong contender in terms of readability, especially in a world that seeks pattern (often too much).
Pro Support for various platforms
There's support for OS X, Linux, and Windows (otf, ttf) in Fantasque Sans Mono.
Pro No useless experiments with special characters
Pro Own personality
It looks distinct, playful. But don't cross the line when it becomes unusable.
Pro Lowercase "k" looks nice
Pro Glyphs support
This is good for those who wish to use different designs of a certain character.
Pro Has ligatures
Alpha version supports ligatures as Fira Code does.
Pro Truly compact
The Height line is quite short but coherent. You have to like the style but this is one of the most readable at a small size ( 9pts ).
Pro Cyrillic alphabet support
This is useful for those who wish to use letters from certain Eastern European or Asian alphabets.
Pro Webfonts included (eot, svg, woff)
Webfonts, such as eot, svg, and woff, are included in Fantasque Sans Mono.
Pro Powerline symbols
Pro Libre webfonts are available in svg, eot, ttf, woff, and woff2 formats
Hack is free for unlimited commercial and non-commercial use. The webfonts are hinted (TrueType instruction set) to optimize display on the screen and are built into all commonly used web font formats with each new release. They include the complete release character set and smaller (filesize) basic Latin subset releases. They are available in the build directory of the repository.
Pro Very readable
Pro Fixes many readability issues in Vera/DejaVu
The tilde symbol ('~'), comma (',') and semicolon (';') glyphs have been modified to be more readable at small sizes and/or on non-HD displays. In addition, the underscore symbol ('_') has been slightly lifted for alignment with surrounding characters.
Pro Based on the tried and tested Bitstream Vera Sans Mono
The fonts are in the Vera Sans Mono lineage with a significant expansion of the character set (which includes Cyrillic and modern Greek character sets), new glyph shapes and modifications of the original glyph shapes, as well as improvements in metrics and hinting/TT instructions to make it more legible at small text sizes used for source code.
The changelog is available here.
Pro Free/Open license
Pro Powerline glyph patch is included
The regular set is patched with Powerline glyphs by default. There is no need to patch the font to use it in Powerline environments.
Pro Source code is released in UFO format
UFO source format is widely supported by all modern font editors if you would like to modify the typeface.
Con Lowercase "k" is ugly
The lowercase "k" seems like a strange "r" since it has a line that extends to the top of capital letters. There is currently a workaround aiming to correct this.
Con The size is too small
Letter size is smaller than other fonts at the same setting.
Con Too similar to DejaVu
See this gif comparison between the two fonts: https://gfycat.com/SomberUnitedGermanshepherd
Con Sometimes difficult to distinguish lowercase "i" and lowercase "l"
When using a higher resolution monitor and a smaller font size, the lowercase "i" and lowercase "l" are very difficult to distinguish. The space between the dot and the remainder of the letter seems to somehow disappear, thereby making it look like a solid line, similar to the lowercase "l".