hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
PartnerStack - GrowSumo helps growing companies increase sales, signups, and leads through partnerships Whether you're starting fresh, migrating a partner program, or ready for hyper-growth - we're ready, are you?
MTcaptcha - Enterprise Captcha solutions
Invite Referrals - Invite Referrals is the simplest tool to design and launch customer referral campaigns.
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.
Impact - Impact Partnership Cloud is an affiliate marketing tool that helps businesses to manage the entire lifecycle of partnerships from recruitment to incentivization.