What are some alternatives?
When comparing Nzbvortex and GetNZB, you can also consider the following products
SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.
NZBGet - The most efficient usenet downloader.
GrabIt - GrabIt is a free application that enables you to easily find and download content from Usenet news...
NewsBin - NewsBin Pro is a Usenet NNTP newsreader that downloads and decodes binary file attachments to...
HelloNzb - HelloNzb - The Binary Usenet Tool
alt.binz - alt.binz is a powerful binary newsreader, for downloading and managing articles from Usenet.