Sumnotes is described as 'extracts information from PDF files to let you focus on what matters' and is an website in the Office & Productivity category. There are three alternatives to Sumnotes, not only websites but also apps for Mac, Windows and Zotero. The best alternative is Highlights, which is free. Other great sites and apps similar to Sumnotes are PdfHighlights (Free) and ZotFile (Free, Open Source).
- 3 alternatives