FreeOTP

Android

iPhone

Android Tablet

iPad

Open source implementation of the two-factor authentication HOTP and TOTP schemes.

Authenticator

Authenticator is a simple, free, and open source two-factor authentication app.

<p>It has been removed from the Play Store</p>

Open Authenticator

A trusted open-source Authenticator. Formerly known as SmartWatch2 Authenticator free.

Windows

Linux

Microsoft Edge

Google Chrome

Firefox

Authenticator generates two-factor authentication (2FA) codes in your browser. Use it to add an extra layer of security to your online accounts.Features:

GAuth Authenticator

Online

Chrome OS

Software as a Service (SaaS)

5apps

A simple application for multi-factor authentication, written in HTML using jQuery Mobile, jsSHA, LocalStorage and Application Cache.

Protectimus is an OATH-certified two-factor authentication solution that supports all standard algorithms of one-time passwords generation (HOTP, TOTP, and OCRA) and a wide range of hardware and software tokens, including absolutely new reprogrammable NFC tokens, convenient iOS and Android applications, and OTP delivery via SMS and Email.

Protectimus solutions are available in two forms: as a Cloud Service or as a Platform (the client installs our 2FA solution on his own servers). Flexible API allows quick integration with basic programming languages such as Java, Python, PHP, etc. 

Cloud Service

Comprehensive SAAS-based solution for effective two-factor authentication integration.
Minimum costs. You pay only for what you actually use. You can activate, deactivate, or modify your service plan at any time.
Quick start. To begin working with our system, you simply need to register in the service and begin the integration with our service!
Quick integration. Protectimus has developed a set of auxiliary libraries for popular programming languages that will help you to quickly implement two-factor authentication into your project.
Turnkey package. The service offers you a cloud platform accessible 24/7, convenient monitoring and management tools, and a wide range of tokens.
Platform

Comprehensive two-factor authentication solution installed in your environment.
The speed of integration is the same as for the service.
Full control. You fully control all aspects of the authentication system’s operation, including the user database and other sensitive information.
Individual approach – a personal manager.
Additional protection. The platform does not require any connection with the outside world, so it can be used in isolated networks or networks that are protected by firewalls and other security features and tools.
Customizable based on a customer’s purpose and requirements. If you need any specific functions for the authentication system, the team can do it for you.

Protectimus

Protectimus Solutions provides a powerful multi-factor authentication service. We offer 2FA SaaS platform and on-premise version of the product which supports a great variety of TOTP tokens and program tokens for OTP delivery.

Open Source Protectimus Alternatives

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FreeOTP

Authenticator

Open Authenticator

Authenticator

GAuth Authenticator