Free version of DocuSign?

Basically title.

No matter what I will be playing this game with FoundryVTT over the internet. We live separate from two of our players, its not a problem and its how we've played all our games, we're used to it (and love it actually).

I thought it would be fun to mimic making players sign their contracts by having them do a DocuSign of any contracts. However, it appears there is no "free" tier for that. Does anyone know of any alternatives? Ideally, I'd like some kind of service that presents the contract like DocuSign to have it appear "Official".

If not I'll just send documents to them and have them put an e-signature on there. Just thought the experience might be fun.