Yes, and we highly encourage you to enable it for enhanced security. Our two factor authentication system is compatible with Google Authenticator, Authy (our favorite), and all other TOTP-based systems. To enable it, login to your client area and click on the upper-right hand section where it says "Hello, [your name]!" From the drop-down menu, select Edit Account Details. In the submenu, click on Two Step Verification. Click the Enable Two Step Verification button and follow the instructions.