No. Scrive is open and free for anyone to sign, as many times as they like. Only the person creating/sending the contract needs to have a Scrive account.
When you create a contract, you can send it to the signing parties via email or SMS or both, and you can even do in-person signing like all of our retail customers. The signing party will receive an invitation in their inbox or on their phone, and they can sign immediately on any device with an internet connection.