A small business can shop off-exchange through a broker, buy a small-group plan...

https://weekly-wiki.win/index.php/Health_Insurance_for_a_Company_with_30_Employees:_Off-Exchange_Options

A small business can shop off-exchange through a broker, buy a small-group plan directly from a carrier, or consider an HRA for individual coverage. Before comparing premiums, check whether employees’ doctors and preferred hospitals are in-network.