Cotter - One-click phone number login and checkout

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.

Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.

Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.

Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.