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Authium is a desktop-first two-factor authentication (2FA) app and browser extension. Instead of opening your phone every time a website asks for a verification code, it lets you generate and autofill one-time passwords (OTP/TOTP) directly on your computer.
From their website, the main idea is:
Desktop-based authenticator → access 2FA codes on your PC/Mac/Linux instead of your phone.
OTP autofill & keyboard shortcuts → quickly fill login verification codes in the browser.
End-to-end encrypted sync → your authenticator vault can sync across trusted devices while staying encrypted.
Team sharing / vaults → aimed not only at individuals but also teams that share access securely.
Works on Windows, macOS, Linux, and integrates with browsers.
In simple terms: it’s trying to be like an authenticator app (similar to Google Authenticator or Microsoft Authenticator) but optimized for desktop workflows so developers, professionals, or teams don’t need to constantly reach for their phone.
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