# Authentication for modern apps

Identity platform for user authentication & authorization. Everything you need to ship secure, high-conversion login flows without rebuilding your app.

[Start for Free](https://portal.authgear.com/?utm_source=feature-authentication&utm_medium=link&utm_campaign=start-for-free) [Get a Demo](/content/schedule-demo/index.html)

Free plan includes **unlimited MAUs**

## Fast to Implement. Seamless to Use.

Seamless login & onboarding

Add auth in minutes

Secure & flexible RBAC

Customize to fit your brand

## Authentication methods users love

Passkeys, passwordless, biometric login, social providers, and classic passwords—pick what fits your audience

## SMS, WhatsApp & Email One-Time Password

Six-digit OTP via SMS, WhatsApp or email, with rate limiting, cooldowns, and expiry controls

## Magic Links

One-tap email login for quick re-entry

## Social Login

Apple, Google, Facebook, GitHub, LinkedIn, WeChat and more

## Adaptive MFA

Step-up the right users at the right time; support TOTP, passkeys, OTP, and additional password

## Anonymous Users

Let users try your app instantly, then convert seamlessly when the moment's right

## Re-auth

Require an extra check before profile edits, payments, or key approvals

## Bot & Fraud Detection

CAPTCHA and rate limits reduce abuse and SMS pumping risk

## Single Sign-On (SSO) everywhere

SSO across web applications and mobile applications

## Branding & Theming

Apply your logo, colors, and copy to hosted login pages—or build a fully custom UI while Authgear handles the auth logic.

## M2M Tokens

Require an extra check before profile edits, payments, or key approvals.

## Developer Experience

### SDKs

JavaScript/TypeScript (web & SPA), iOS (Swift), Android (Kotlin), React Native, Flutter,…

### Admin API

Provision users, assign roles, and query logs programmatically.

## Use Cases

Global QSR Streamlines Frontline Login with Authgear

K11 Unifies Login Across Lifestyle Apps with Authgear

Hongkong Land Streamlines Staff & Partner Access with Authgear

## Ready to transform your authentication experience?

Ready to explore Authgear? Request a demo today!

Free plan includes **unlimited MAUs**.