General Comparison of products |
Basic software package |
$79.00 |
Free |
$250 |
$100 |
Free |
Free web storage space |
NA |
1 GB |
1 GB |
NA |
100 MB |
Premium software package |
NA |
4.00–9.99/month |
NA |
NA |
1.67–20.00/month |
Reference and Document Management |
Organization of PDFs and other documents |
Yes |
Yes |
Yes |
No |
Yes |
Citation plug-ins for Word |
Yes |
Yes |
Yes |
Yes |
Yes |
Citation plug-ins for Open Office |
Yes |
Yes |
Yes |
No |
Yes |
Annotations/highlighting in PDFs |
Yes |
Yes |
Yes |
No |
No |
Cross-platform synching across desktop, web, and mobile devices |
No |
Yes |
No |
No |
Yes |
Knowledge discovery |
Free and open database approaching 100 million documents |
No |
Yes |
No |
No |
No |
Personalized paper recommendations |
No |
Yes |
No |
No |
No |
Readership statistics and community tags |
No |
Yes |
No |
No |
No |
Open Web API |
No |
Yes |
No |
No |
Yes |
Full text search across all your papers |
Yes |
Yes |
Yes |
No |
Yes |
Search across external databases |
Yes |
No |
Yes |
Yes |
No |
Collaboration |
Private groups |
No |
Yes |
Yes |
Yes |
Yes |
Public groups |
No |
Yes |
No |
No |
Yes |
Social network |
Yes |
Yes |
No |
No |
Yes |
Collaboration newsfeed |
No |
Yes |
No |
No |
Yes |
General technology |
Web app |
No |
Yes |
Yes |
Yes |
Yes |
Desktop app |
Yes |
Yes |
Yes |
No |
Yes |
Compatibility with all modern web browsers |
Yes |
Yes |
No |
Yes |
No |
Compatibility with Mac/Win/Linux |
No |
Yes |
No |
No |
Yes |
Mobile and iPad |
Yes |
Yes |
No |
No |
No |
Product feedback forum |
Yes |
Yes |
Yes |
No |
Yes |
Library systems integration/EZproxy Support |
Yes |
No (almost there) |
Yes |
Yes |
Yes |
Metadata extraction technology |
Extraction of DOI from PDFs |
Yes |
Yes |
Yes |
Yes |
Yes |
Extraction of PubMed IDs and ArXiv IDs from PDFs |
Yes |
Yes |
No |
No |
Yes |
Extraction of embedded metadata from PDFs |
Yes |
Yes |
Yes |
No |
Yes |
Extraction of citation from PDFs without embedded metadata |
No |
Yes |
No |
No |
Yes |