Tools with Pdf Annotation
3 tools offer pdf annotation. 2 have free plans.
| # | Tool | Rating | Free Plan | Price |
|---|---|---|---|---|
| 1 | Heptabase | ★ 4.6 | ✗ | $11.99+ |
| 2 | Zotero | ★ 4.5 | ✓ | Free / $20+ |
| 3 | Mendeley | ★ 4 | ✓ | Free |
#1
Heptabase
Visual note-taking tool that helps you make sense of complex topics using whiteboards, cards, and mi...
#2 
Zotero
Free open-source reference manager for collecting, organizing, and citing research.
#3 
Mendeley
Reference manager and academic social network for organizing research papers.