Home - HubSpot Email Marketing - How many contacts do you need on your list to run an A/B test? How many contacts do you need on your list to run an A/B test? 2shares Facebook Twitter Pinterest LinkedIn Skype Facebook MessengerQuestion: How many contacts do you need on your list to run an A/B test? At least 1,000 At least 50 At least 2,000 At least 500 The right answer was: At least 1,000