When comparing Sumatra PDF vs Adobe Acrobat Reader, the Slant community recommends Sumatra PDF for most people. In the question“What are the best PDF viewers for Windows?” Sumatra PDF is ranked 1st while Adobe Acrobat Reader is ranked 17th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Starts quickly
Pro Free and open source
Sumatra is available for free, licensed under GPL with source code available on GitHub.
Pro Low resource usage
Pro Does not have heavy editor features
Annotations and other heavy features are just not needed in reader.
Pro Extensive keyboard shortcuts
Pro Elegant interface
Pro Portable
The application consists of a single file that can be run without installation. You can put it on an external device, such as an usb thumb stick and run it on any Windows machine from the thumb stick.
Pro Multilingual
It's available in 69 languages.
Pro Real All PDF
There isn't a PDF file which cannot be read by this app.
Pro Cloud compatible
Can connect to Dropbox and Google Drive.
Pro SD location recognition
Locate SD location and scan it quickly.
Pro Multiple view modes
Page, scrolling, two-page (in landscape) and a reflow mode.
Pro Just works
The app reads all PDF files.
Cons
Con Windows only
Con Lacking in features
Sumatra aims for simplicity at the expense of functionality. For example, there's no way to annotate PDFs or edit them.
Con Fonts are not smooth enough
Not as smooth as e.g. Adobe Reader. No anti-aliasing
Con Cannot crop empty fields
Just got used to this killing feature on Goodreader on Mac.
Con Does not work without log-in
Adobe is one of the biggest data harvesting companies.