Open Authenticator vs Trezur

Comparing two open source alternatives to Google Authenticator and Authy and Microsoft Authenticator . Use the comparison below to decide which one fits your needs.

Open Authenticator

GPL-3.0

Free, open-source cross-platform TOTP authenticator with self-hostable sync backend, built with Flutter.

Fast, secure, light-weight web-app to generate TOTP and HOTP tokens.

	Open Authenticator	Trezur
License	GPL-3.0	—
Self-hostable	Yes	Yes
GitHub Stars	82	2
Forks	14	—
Open Issues	5	—
Last Commit	May 29, 2026	May 28, 2026
First Released	Mar 25, 2024	Feb 15, 2025
Categories	2FA Authentication	2FA Authentication
Tags	#2fa #authentication #cross-platform #totp	#2fa #authentication

Simple OTP app for desktop and mobile.

Local-first, web-based two factor authenticator app.