NetNewsWire has a strong following among early Really Simple Syndication (RSS) users on the Mac OS X platform, but is facing increased competition now that Apple has included support for the syndication technology in OS X 10.4 Tiger.
Penetration of RSS on the Mac is relatively high, according to Greg Reinacker, founder and chief technology officer at NewsGator.
"That gives us a unique opportunity to try out new leading-edge stuff with [Mac users]," he said.
RSS has emerged as a tool that notifies users when new content is published on a website. The technology was made popular by blogs and news websites, but is still in its infancy.
In addition to a basic free service, NewsGator offers several premium services including the Outlook plug-in and an email notification service.
The addition of NetNewsWire makes NewsGator the world's largest RSS provider, Reinacker claimed.
The RSS technology is expected to gain further appeal with the release of Internet Explorer 7.0 next summer, which will include support for the technology, as will the forthcoming Windows Vista.
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