If you're planning to create a WordPress-powered site, there's no reason not to invest in WordPress-specific hosting. It's chock full of benefits. That said, a WordPress environment won't allow you to set up a non-WordPress site—that's something else to keep in mind, especially if you have a site in mind that will rely on specific frameworks, for example. In such instances, you'll want to go build your site on shared hosting, VPS hosting, or dedicated hosting services. And, if you want to start your own web hosting company, reseller hosting is the way to go.
For plans or packages featuring unlimited websites, domains, or email accounts, we do not enforce any official limitations. Customers are able to utilize as many of these features as they wish. That said, these are of course not infinite resources and there are inherent maximums associated with the technology powering them. For example, while email account creation is unlimited, these rely on the file storage available on the account. Therefore customers need to be operating within the Terms of Service to ensure resources are available to fully enable email functionality. Customers operating within the Terms of Service have yet to come up against technical boundaries for email, domains, or websites.
In addition to offering reliable and affordable WordPress hosting, Bluehost installs WordPress automatically upon the completion of signing up for an account. You don't need to worry about finding the correct version of WordPress, Bluehost always installs the latest version so you have the most recent features available for your website. Bluehost has been the #1 recommended WordPress hosting provider since 2005 and we take pride in our customer service and expertise. 

For packages supporting unmetered disk space or data transfer (bandwidth), we do not have defined limitations. These resources are "unmetered", meaning you are not billed according to the amount of disk space or bandwidth used. While of course these resources are not infinite, we believe our customers should have all the resources necessary to build an online presence and 99.95% of customers will have more than enough disk space and bandwidth to meet their needs.
WordPress' origins can be traced back to the beginning of 2001 when the blogging solution B2/cafelog was launched by French programmer Michael Valdrighi. B2/cafelog was an innovative solution at the time because it introduced the ability for pages to be created dynamically with a MySQL database. Valdrighi continued to work on B2/cafelog and released version 1.0 in 2002. Shortly afterward, Valdrighi stopped developing his solution. This was particularly unfortunate because B2/cafelog had actually grown its user-base to a reasonable number. These users were left without a supported solution.
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