| Type | Amazon Kindle | Both | Rakuten Kobo |
|---|---|---|---|
| eBook Types | - DOC, DOCX - HTM - JPG | - EPUB - TXT - HTML - RTF - PNG - JPEG - GIF - BMP | - EPUB2, PUB3 - FlePub - MOBI - CBZ, CBR - TIFF |
| Book Selection | - More | - | - Less |
| Cloud Storage for Imported Books / Documents | - Tons - Send to Kindle | - | - Only on eReader device - Must sideload - Support for Dropbox - Support for Google Drive |
| Integrated Apps | - OverDrive | - | - OverDrive - DropBox - Google Drive |