Best Referral Programs - A curated directory of startup referral programs
once fyi - Create privacy friendly one-time mailing lists
ReferralMagic - Turn your users and customers into referral magnets.
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Viral Loops for Startups - Virality for startups made easy 💪
How to launch like Harry's - Easily create a referral program with this handy tool 💪