CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Social Mapper - A Social Media Enumeration & Correlation Tool by Jacob Wilkin(Greenwolf) - Greenwolf/social_mapper
Flico - Add visual search to your Chrome browser
Truein Staff Attendance - Truein Staff Attendance is a software that offers services to companies in touchless face recognition based on employee attendance.
Google Vision AI - Cloud Vision API provides a comprehensive set of capabilities including object detection, ocr, explicit content, face, logo, and landmark detection.
Kairos - Facial recognition & mood detection API