Does Aventide work for freelance designers and developers?

Yes, if you design or build sites on your own. Send the proposal, then start from Aventide’s built-in Service Agreement, a general contract with a 30% deposit you can change, or its Design Project Agreement, and send an invoice yourself as each stage of the work is done. When you bring in a subcontractor, add them to your account; Starter and Pro include unlimited team members.