Both. You can sign up as an Actor and an Executive.

An Executive can be a casting agent, talent rep, director etc. Executives are anyone who is not an Actor. 

Executives can use BACKLOT to organize and track projects, roles, submissions and requests in a secure environment.  As an Executive you can: Securely stream, download and upload self-taped auditions. Share auditions and talent information with casting agents, producers, executives and more within Backlot's secure environment. No more leaked auditions. Create and manage projects and [...]

Actors can use BACKLOT to manage their career quickly, easily & securely, from any mobile device. As an Actor you can: Film and upload your best self-taped auditions anytime, anywhere. Send self-taped auditions and demo reels in a secure environment. No more leaked tapes! Easily add and update resumes, headshots and talent rep information. Link [...]

BACKLOT is the fast, simple, and secure way to submit self-taped auditions right from your mobile device.   Designed with Actors in mind, BACKLOT streamlines the process of taping, submitting and sharing auditions in an easy to use secure environment.