Microsoft has reached the 1 million subscriber mark with its Office 365 Home Premium product, officials said on May 29.

The company launched Office 365 Home Premium on January 29 . For $99.99 per year, Office 365 Home Premium allows users to install Office client apps on up to five PCs and/or Macs in total. Users who subscribe rather than buy the single-use Office 2013 complement outright, also are supposed to receive regular feature updates and synchronization capabilities by signing in through Office.com.

Microsoft is trying to convince more users to subscribe to its software as if it were a service.

Microsoft officials are saying that the company reached the 1 million mark in about 100 days, or 3.5 months, according to the graphic in today's Office News Blog post. Microsoft officials compare that growth rate to those of other subscription services, like Instagram (which took 2.5 months to reach the 1 million mark, according to Microsoft); HuluPlus (5 months to 1 million); Spotify (5 months to 1 million); Dropbox (7 months to 1 million) and Facebook (10 months to 1 million).

I've asked Microsoft how many copies of Office 2013 (the local, non-subscription version) the company has sold to date. I'm doubtful the Softies are sharing that number, but if they do, I will update this post.