Google Vision AI - Cloud Vision API provides a comprehensive set of capabilities including object detection, ocr, explicit content, face, logo, and landmark detection.
Batch Photo Face - Automatically recognize faces in 1000s of photos and process images based on face detection results!
Amazon Rekognition - Add Amazon's advanced image analysis to your applications.
CompreFace - CompreFace is a free face recognition service from Exadel that can be easily integrated into any system using simple REST API.
Kairos - Facial recognition & mood detection API
SNFaceCrop - SNFaceCrop is a Windows-based application to detect and crop faces from an image file.