⚡ Authentication in Slovakia

Authentication services enable developers to integrate third-party authentication into their websites and applications, allowing users to sign in with accounts from identity providers such as Google, Facebook, Apple, Microsoft, and Discord.

Slovakia is a Central European country with a population of around 5.4 million people.

According to our statistics, authentication services are detected on 1.1% of websites from Slovakia.

⭐ Most Popular in 2026

The following chart shows the top authentication services in Slovakia in 2026, based on market share.

The most popular is Google Identity with an impressive share of 45.9%, followed by Facebook Login with 34.9% and Google Sign-In with 26.6%.

Google Identity 45.9%
Facebook Login 34.9%
Google Sign-In 26.6%
Sign In with Apple 11%
Firebase Authentication 2.8%
Auth.js 2.8%
Amazon Cognito 0.9%
Auth0 0.9%
Microsoft Entra ID 0.9%

🚀 Highlights

Here is a list of the top services that are more popular in Slovakia than worldwide.
Differences between global and country rankings are shown in parentheses.

✨ Best Authentication Services

Below is a more detailed list of 9 authentication services used on sites from Slovakia, ranked by their market share.

Rank	Name	Market share
1	Google Identity Mountain View, California, United States A suite of services and APIs from Google that handles user sign-up, sign-in, and authorization across web and mobile apps. Free	45.9%
2	Facebook Login Menlo Park, California, United States A convenient way for Facebook's billions of global users to log into your app or website. Free	34.9%
3	Google Sign-In Mountain View, California, United States A deprecated JavaScript library that has been superseded by Google Identity Services for Web. FreeLegacy	26.6%
4	Sign In with Apple Cupertino, California, United States A service provided by Apple that allows users to sign in to apps and websites using their Apple IDs. $99/year	11%
5	Firebase Authentication Mountain View, California, United States A backend authentication service that enables applications to sign in users using email and password, third-party identity providers, email links, and phone numbers. Free tier$$$	2.8%
6	Auth.js San Francisco, California, United States An open-source authentication solution that integrates with Next.js, Nuxt, Qwik, and other modern JavaScript frameworks to handle user sign-in, session management, and access control. FreeOpen source	2.8%
7	Amazon Cognito Seattle, Washington, United States A user identity service by Amazon Web Services that lets you add user sign-up, sign-in, and access control to your web and mobile apps. Free tier$$$	0.9%
8	Auth0 San Francisco, California, United States A cloud-based identity and authentication management platform that allows developers to add authentication to their applications. Free$35+/month	0.9%
9	Microsoft Entra ID Redmond, Washington, United States A cloud-based identity and access management solution. Free$6+/user/month	0.9%

👉 See Also

🌎 Authentication in other countries

Data is based on the analysis of 9,650 websites from Slovakia.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.