Digicert - Encryption & Authentication
Okta - Enterprise-grade identity management for all your apps, users & devices
Comodo - Comodo, the leading Internet Security Provider offers Free Antivirus, SSL Certificate and other Internet Security related products with complete protection
OneLogin - On-demand SSO, directory integration, user provisioning and more
Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.