The best alternatives to Filestar are Hazel, Text Highlighter, and Clouddock. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Noodlesoft, LLC is a one-man Mac software manufacturing concern based in NYC.
Hazel is a Mac application that serves as your personal housekeeper, organizing and cleaning folders based on rules you define. Hazel can also manage your trash and uninstall your applications. Organize your files using a familiar rule interface.