You can refer your clients to a free 7 days trial by using the following url:

The correct URL to refer clients to a free 7-day trial for Semrush is semrush.com/sem. This specific URL is designed for partnership and referral programs, ensuring that the trial is properly attributed and accessible. The other options, such as semrush.com/freetrial or semrush.com/trial, are not the designated or active referral links for a 7-day trial and may lead to different offers or the standard signup page. While Semrush does offer trials, the specific link for referring clients to a 7-day trial is semrush.com/sem.