Not everyone needs best-in-class software. So why not purchase the best? Just because a vendor sits in the upper right quadrant doesn't make it the best choice for you. You may need to consider your budget, your culture of organic open source IT, or maybe you want to focus on your core competencies which isn't BI development.
Even the Fortune 1000 should look outside the typical "short-list" of BI vendors. And then there are the small to mid-sized businesses with typically limited IT resources.
Thank you Fayu for this post from The Data Doghouse giving options beyond the best-in-class vendors. Here's my shortened list of options.
BI with SaaS - cost effective, minimum internal IT resources required, All you can eat BI.
Open Source BI - cost effective, typical BI technical architecture, requires internal IT support, Open source validated.
BI appliances - simple solution from customers perspective, BI in a box that sits at your site.
Microsoft Excel - least expensive, inherent problems with taking this approach but works for some.
To help with others doing their research on these vendor categories, if you know of companies that fall within these categories, send them my way or post your own comment. I know I could learn something from these new offerings too.