Mailchimp
ActiveCampaign
Intercom
Shopify
Slack
WordPress
HubSpot CRM
Zapier
Unbounce
ReferralHero is one of the best referral apps on the market, handling the referral schemes of over 6,000 established brands, including Fortune 500 companies. This platform boosts business growth by 5-10% by month and offers a robust set of features. Clients can integrate ReferralHero with more than 500 external apps such as WordPress, Slack, MailChimp, and Zapier.