Upload Suite is available in three editions: Express, Professional, and Premium. This topic compares them by functionality.

Features Express Professional Premium
ActiveX/Java Uploader
Maximum file size 100 Mb 2 Gb any
Maximum size of created thumbnail 3 megapixels 5 megapixels any
Maximum number of files 100 any any
Displaying and uploading folders * *
Uploading to cloud storages (Amazon S3, Nirvanix) * *
Saving and restoring upload list * *
Automatic upload recovery * *
Using Thumbnail control * *
Uploading hash sums * *
Registering several license keys that allows you to host Upload Suite on one domain and upload files to another * *
Preserving EXIF metadata when creating thumbnails * *
Preserving original color space when creating thumbnails * *
Using quality meter * *
Using HTTPS for both host and upload pages * *
IP licensing *
CNAME licensing *
Uploading full file path by request
Getting file paths through API by request
Using private-label version by request
HTML5/Flash Uploader
Maximum file size 100 Mb 2 Gb any
Maximum size of created thumbnail 3 megapixels 5 megapixels any1)
Maximum number of files 100 any any
Registering several license keys that allows you to host Upload Suite on one domain and upload files to another * *
Preserving EXIF metadata when creating thumbnails * *
Using HTTPS for both host and upload pages * *
IP licensing *

1) - Maximum size of thumbnails created for non-JPEG images is 16 megapixels. It is a Flash Player limitation.

Each edition (Express, Professional, and Premium) has its own set of license keys. For example, if you buy a Professional edition license, the obtained key unlocks Express and Professional features, but Premium features remain locked. However, the set of installation packages is the same for all editions.