There are multiple Microsoft Office 365 plans for home, business, large corporations, schools, and non-profits. Microsoft’s Office 365 is a subscription service that ensures users have the most modern productivity tools that Microsoft has to offer. So which option is the best option for you and what are the differences between the two plans? Today I’ll take a look at both the monthly subscription plan and the one-time purchase option to help you make the best decision. There is also the newer subscription-based version, Microsoft Office 365. There’s the traditional Microsoft Office one time purchase that has been around for quite some time. There are two basic versions of Microsoft Office. Microsoft Office has been a longstanding staple in homes and workplaces for years. It has become a go-to productivity tool used by millions of workers.