Okta - Enterprise-grade identity management for all your apps, users & devices
ManageEngine M365 Manager Plus - Auditing, monitoring and reporting tool for Office 365
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Secure Suite - Cloud Email service
OneLogin - On-demand SSO, directory integration, user provisioning and more
NeoCertified - Secure email for confidential & sensitive documents