Better Auth vs Firebase Authentication

Learn how Better Auth and Firebase Authentication differ in their key features like authentication, enterprise auth, security, user management and compliance, so you can decide which of these authentication providers is best for you.

Better Auth

Full-featured TypeScript authentication in minutes

Visit Better Auth Read more

Details:

B2B
Yes
B2C
Yes
Open Source
Yes
Self-hosted
Yes

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Firebase Authentication

Secure multi-platform authentication in under 10 lines

Visit Firebase Authentication Read more

Details:

B2B
Yes
B2C
Yes
Open Source
No
Self-hosted
No

Descope — Drag & drop customer and agentic identity platform for any app

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Feature Comparison

Better Auth has significantly broader feature support than Firebase Authentication, with 33 supported features versus 22. Better Auth fully covers authentication.

Passwordless Authentication

Better Auth

Magic link and email OTP plugins allow passwordless sign-in using one-time links or codes

Firebase Authentication

Social Connections

Better Auth

Supports multiple social providers through built-in OAuth and generic OAuth plugin for custom providers

Firebase Authentication

Passkeys

Better Auth

The passkey plugin adds FIDO2 / WebAuthn support for passwordless, phishing‑resistant sign‑in

Firebase Authentication

Long Lived Sessions

Better Auth

Session settings allow you to configure expiresIn and updateAge to create longer or shorter sessions

Firebase Authentication

Session Management

Better Auth

Firebase Authentication

Multi-Language

Better Auth

Multi-language is supported via the i18n plugin

Firebase Authentication

Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages

	Better Auth	Firebase Authentication
Passwordless Authentication	Magic link and email OTP plugins allow passwordless sign-in using one-time links or codes
Social Connections	Supports multiple social providers through built-in OAuth and generic OAuth plugin for custom providers
Passkeys	The passkey plugin adds FIDO2 / WebAuthn support for passwordless, phishing‑resistant sign‑in
Long Lived Sessions	Session settings allow you to configure expiresIn and updateAge to create longer or shorter sessions
Session Management
Multi-Language	Multi-language is supported via the i18n plugin	Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages

Compliance Comparison

Firebase Authentication offers significantly broader coverage than Better Auth, supporting 6 certifications and regulatory frameworks compared to 0 for Better Auth. Since Better Auth is open source and does not include compliance certifications, you’ll need to manage compliance yourself.