SiteGround has long been a favorite for hosting in the US, but German company 1&1 has been in the business a lot longer and knows how to offer a comprehensive hosting service. It has a greater selection of hosting options and they all come with more memory and processing power than those offered by SiteGround. They’re also much cheaper too. 1&1 supports all major providers for CMS, including Magento and Presta Shop, and unlike SiteGround, 1&1 users can code their site in all major coding languages, like Django and Python.
I’ve been a customer of IONOS for years and am satisfied with the service I receive. If I have a problem, someone is there to assist personally shortly. The hosting is stable and easy to use.