In JoomShaper Quickstart (Demo content) we used both Joomla! core and additional extensions. Here is a full list of them:

• SP Page Builder 2.x Pro - Pro version is built-in in QuickStart only (JoomShaper.com)
• AcyMailing Starter (component + module from Acyba.com)
• Articles - Latest (Joomla core module)
• Articles - Categories (Joomla core module)
• Breadcrumbs (Joomla core module)
• Custom HTML (Joomla core module)
• Search (Joomla core module)
• Menu (Joomla core module)

Of course you can install additional modules or components. But listen main rule: less is more, also in security area.