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