Amazon Mechanical Turk - The online market place for work.
Tremendous - Tremendous is a customer and employee loyalty platform that allows companies to reward their customers for surveys promotions and referrals.
Supervisely - Supervisely helps people with and without machine learning expertise to create state-of-the-art...
Tango Card - Tango Card bundles an awesome catalog of e-gift cards and other e-rewards with easy-to-use technology and expert program support.
Labelbox - Build computer vision products for the real world
Rybbon - Send digital e-gift cards as marketing incentives or rewards with Rybbon, which integrates with Marketo, HubSpot, SurveyMonkey, and Qualtrics.