Amazon Machine Learning - Machine learning made easy for developers of any skill level
RecoMind.io - Personalized recommendations at scale
Apple Machine Learning Journal - A blog written by Apple engineers
AWS Personalize - Real-time personalization and recommendation engine in AWS
Apple Core ML - Integrate a broad variety of ML model types into your app
Google Recommender API - Google Recommender API is a service on Google Cloud that provides usage recommendations for Google Cloud resources.