⚡ Authentication in Bulgaria

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.

Bulgaria is a Southeastern European country with a population of around 6.5 million people.

According to our statistics, authentication services are detected on 1% of websites from Bulgaria.

⭐ Most Popular in 2026

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

The most popular is Google Identity with an impressive share of 36.8%, followed by Facebook Login with 36.8% and Google Sign-In with 28.8%.

Google Identity 36.8%
Facebook Login 36.8%
Google Sign-In 28.8%
Sign In with Apple 6.4%
Amazon Cognito 2.4%
Auth0 2.4%
Auth.js 1.6%
Keycloak 0.8%
Firebase Authentication 0.8%
Sign In with LinkedIn 0.8%

🚀 Highlights

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

4. Sign In with Apple ^(-1)
5. Amazon Cognito ^(-3)
7. Auth.js ^(-7)
8. Keycloak ^(-1)
9. Firebase Authentication ^(-1)
10. Sign In with LinkedIn ^(-6)

✨ Best Authentication Services

Below is a more detailed list of 10 authentication services used on sites from Bulgaria, 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	36.8%
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	36.8%
3	Google Sign-In Mountain View, California, United States A deprecated JavaScript library that has been superseded by Google Identity Services for Web. FreeLegacy	28.8%
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	6.4%
5	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$$$	2.4%
6	Auth0 San Francisco, California, United States A cloud-based identity and authentication management platform that allows developers to add authentication to their applications. Free$35+/month	2.4%
7	Auth.js San Francisco, California, United States An open-source authentication solution that integrates with Next.js, Nuxt, Qwik, and other modern JavaScript frameworks to handle user sign-in, session management, and access control. FreeOpen source	1.6%
8	Keycloak San Francisco, California, United States An open-source identity and access management solution that provides user federation, strong authentication, user management, fine-grained authorization, and more. FreeOpen source	0.8%
9	Firebase Authentication Mountain View, California, United States A backend authentication service that enables applications to sign in users using email and password, third-party identity providers, email links, and phone numbers. Free tier$$$	0.8%
10	Sign In with LinkedIn Mountain View, California, United States An authentication service that allows sites and applications to use the LinkedIn sign-in feature. Free	0.8%

👉 See Also

🌎 Authentication in other countries

Data is based on the analysis of 12,911 websites from Bulgaria.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.