The original version of my answer received a lot of attention. Unfortunately, some aspects of the post were misinterpreted and misquoted on twitter and other blogs: 1) I never said or meant to imply that Syncplicity lost to Dropbox. Syncplicity is a alive and well, has a great and growing service and has added a business edition to their product line. 2) I was writing about the year 2008, not about today, specifically the couple of months around the Syncplicity launch and the Dropbox launch, almost 3 years ago. 3) I was one of the three co-founders at Syncplicity, not the CEO and I haven't been with the company in ~2 years. Some of the posts others put out there said otherwise.

My earlier version of this post was about how Syncplicity and Dropbox competed for mindshare back in 2008 when both companies launched. My initial Quora post was about some of the reasons why, around our respective launches, Dropbox was able to get more attention. 3 years ago, the press and early tech adopters were starting to fall in love with Mac products. The average consumer didn't have a Mac, but they were hot amongst influencers. Having a Windows-only product dramatically limited the attention Syncplicity received from the press. Today, I can't imagine launching a desktop app without Mac support. When we started developing Syncplicity, it wasn't obvious that Mac support was critical for press attention. Today both companies have Mac clients.

After its initial launch, Syncplicity figured out how to better manage its larger feature set and added an offering for the enterprise, so you'll also hear about them in the business space today.