If you only envision needing one user, no. However, even in a single-user situation, Helium works best with Liquid’s user management features. For instance, you might want to install Helium with a catch-all email like “support@[your-company].com” so that confirmation emails sent to your responders aren’t being sent from your personal Gmail account. But you might also want to have access to Helium’s lead management features and notifications with your personal email, so that’s two Helium users: your catch-all email account and your personal email account. Liquid Helium has multiple packages, ranging from one user to unlimited users, that will fit your needs.