Gusto has been in business since 2012 when it launched as ZenPayroll. It currently states that it serves over 200,000 businesses. Security appears to be robust, with two-factor authentication used for both employees and employers.  Since payroll is an important function for any business, you’ll want to be sure to review your payroll records regularly. You may want to give your accounting professional permission to your account to serve as a second set of eyes and to ensure you don’t miss important tasks.