Best Referral Programs - A curated directory of startup referral programs
CloudSponge - Companies from every industry use CloudSponge’s Contact Picker to get access to their users’ address books.
Rewardful - All-in-One Affiliate Management Software for SaaS
SaaSiter Contacts Importer - Allow users to import contacts into their system.
Landing Pages by Viral Loops - Easily create a landing page for your referral campaign ✌️
OpenInviter - OpenInviter is a free import contacts (addressbook) script from email providers like Mail2World...