I first got to know them a decade or so ago when they sponsored a blog I was, at that time, writing for. Zoho’s CEO, Sridhar Vembu, invited me to visit Zoho HQ in Chennai, India to take a look at how they did things. The context for that was that, after blogging for a few years on a WordPress-powered platform, I was moving to a blog that leveraged an internally built tool. Yes, Zoho had decided that it made sense to build their own blogging platform on which that new blog would be hosted.
Bear in mind that Zoho has an incredibly extensive platform. Office productivity? Check. Email client? Check. Accounting and invoicing? Check. Wiki solution? Check.