Recombee - Recommender system as a service that uses advanced Machine Learning and Artificial Intelligence algorithms. Easy to try and evaluate.
RecoMind.io - Personalized recommendations at scale
AWS Personalize - Real-time personalization and recommendation engine in AWS
Microsoft Azure Recommendations - Predict what your customers want and increase catalog discoverability
Wrench.ai - Wrench helps to unleash your marketing and sales potential using data science and artificial intelligence.