Ranked in these QuestionsQuestion Ranking
Pro Runs asynchronously
Warns of syntax errors as-you-type - you don't have to wait until you save your code or manually invoke syntax-checking (can be disabled).
Pro Lints as you type
Doesn't wait for you to save before linting, it lints the buffer, not the file.
Pro Add fixers (prettier, standard...)
Pro Works with Language Server Protocol
Pro Being actively developed
Ale has a large, active community that keeps integration with language backends up to date