Are there free Authentication tools?

Yes: ApexVault can be used for free.

How many Authentication tools are listed?

GetTried lists 1 authentication tool, each with real pricing, reviews and an automatic website health check.

1 tool in Authentication.

All Developer Tools AI Tools Productivity Marketing Startups SaaS Design Finance Communication Sales & CRM Customer Support No-Code & Automation Data & Analytics Security & Privacy E-commerce Video & Audio Education HR & Recruiting

All Security & Privacy Password Managers VPN Authentication