Waitlist API - Quick and easy waitlist with built in referral.
HubSpot CRM - Free CRM software for small businesses.
LaunchList - Create waitlist with referral for your product launch
Keap - Grow Sales. Save Time. Get Organized.
Waitlisty.io - Build excitement for your product by embedding a simple form into your website. Signups will receive a referral code to share with their friends. The more codes they share, the more they climb your waitlist.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.