Eric Mann

Add support for <a href="https://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm" rel="nofollow ugc">time-based one-time-password authentication</a> to WordPress. Once enabled, you can use an application on your phone (<a href="https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en" rel="nofollow ugc">Google Authenticator</a>, <a href="https://www.microsoft.com/en-us/store/apps/authenticator/9wzdncrfj3rj" rel="nofollow ugc">Windows Authenticator</a>, etc) to generate TOTP tokens and protect your account from prying eyes.

Dovedi

Time-based One Time Password authentication for WordPress.

passbyme

PassBy[ME] use two-factor authentication with the highest known security standard, which is PKI. Rather than relying on a password authentication, which can be phished or guessed, PassBy[ME] second factor service adds a second layer of security to your WordPress accounts. It protects your website from hacks and unauthorized login attempts.
PassBy[ME] is easy to setup and use. You do not need software installation, just sign up for PassBy[ME] service and install the plugin.
Protect your WordPress website with PassBy[ME] The next generation authentication solution.

PassBy[ME] Two-Factor Authentication

PassBy[ME] improves the security of your WordPress website. Enable two-factor authentication for your users now.

Dovedi vs PassBy[ME] Two-Factor Authentication