Liberal backbencher Cory Bernardi says his new Australian Conservatives group has recorded more than 50,000 online registrations and raised enough money to hire a spokesperson.

The right-wing South Australian senator launched the group in July, amid his high-profile complaints about the Coalition's election campaign result and criticism of Prime Minister Malcolm Turnbull's performance.

Conservatives hope the group will ultimately rival the progressive lobby group GetUp!, with Queensland MP George Christensen saying "if we do nothing, we will let the forces of socialism and globalism conquer".

On Monday, Senator Bernardi used an email seeking donations to report more than 50,000 people had filled in a registration form on the Australian Conservatives website.