Just today I was forced by Docusign to pay $45/user/mo in order to continue using the service for a single document I had to send out for signatures. Seeing this pop up on HN right after feels really nice. The cloud-hosted version seems to be very simple to use, so nice job on this.
Like some of the other comments pointed out, the key element here is trust -- in the 3rd-party platform collecting signatures, and in the confidence that it cannot be manipulated. These are solvable challenges, but calling that out explicitly in your documentation and website copy will help convert skeptics, or at least convince them to give it a try.
They don't advertise it, but if you start the trial then cancel, it'll downgrade you to the free plan. The features are limited - you have to upload every time and recreate the fields every time, but it works for occasional use.
Like some of the other comments pointed out, the key element here is trust -- in the 3rd-party platform collecting signatures, and in the confidence that it cannot be manipulated. These are solvable challenges, but calling that out explicitly in your documentation and website copy will help convert skeptics, or at least convince them to give it a try.