Yes, you can use any WordPress plugins and themes, although we’d always recommend getting them from reputable providers.
Some plugins won’t be necessary, as our WordPress Hosting includes many features offered traditionally by plugins. An example would be our CDN Web Acceleration Suite, which performs performance optimisation on images and code at the server level. Another would be the SirsteveHQ WordPress Manager, which enables you manage all your WordPress websites – things like updates and users – across all your websites from a single screen. We have a bunch of security features that can’t usually be found anywhere except through plugins.
Reducing the number of plugins that you use tends to improve website performance.