PitStop Pro is described as 'Pitstop Pro is an Adobe Acrobat DC plug-in that automatically detects and fixes errors in PDF files and lets you edit PDF files within the Acrobat interface' and is an app in the Office & Productivity category. There are three alternatives to PitStop Pro for Mac, Windows, Chrome OS and Linux. The best alternative is PDF Studio, which is free. Other great apps like PitStop Pro are pdfToolbox by Callas (Paid) and FlightCheck (Paid).
callas pdfToolbox Desktop is the easiest yet most powerful PDF preflight and correction application on the market. You can fix PDF problems during preflight or with a click on the button in the Switchboard.
pdfToolbox by Callas vs PitStop Pro opinions
pros, cons and recent comments
PurplishPenguin Functionality-wise, pdfToolbox is the only Pitstop Pro alternative that provides equivalents of all of the PitStop Pro functionality, with exception of object based editing.