YOLO - Real-time object detection
Amazon Rekognition - Add Amazon's advanced image analysis to your applications.
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.
Google Vision AI - Cloud Vision API provides a comprehensive set of capabilities including object detection, ocr, explicit content, face, logo, and landmark detection.
Scale - Get human tasks done with just one line of code.
CompreFace - CompreFace is a free face recognition service from Exadel that can be easily integrated into any system using simple REST API.