Okta - Enterprise-grade identity management for all your apps, users & devices
UseGravity.App - Build a Node.js & React app at warp speed with a SaaS boilerplate
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
MERNKIT - SaaS Boilerplate for MERN Stack - MongoDB, Node.js, React.js - Stripe, Authentication, User Management, Beautiful UI - Focus on features!
OneLogin - On-demand SSO, directory integration, user provisioning and more
SaaSBox - Everything you need to jumpstart and run your SaaS in one turnkey package. Save months launching and running a SaaS