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