Can a client with no Adobe eServices sign a PDF form sent from Adobe eSign? (Both mobile and desktop options)

Hi:

I am trying out a service that would enable our small business to sign PDF documents either in our desktops or on our mobile devices. I came across Adobe eSign Services as a mobile solution (Since we already have Acrobat Pro) However, because I am pretty new at Adobe eServices, I am wondering is a client with no Adobe eServices (eSign) could sign a PDF that was sent to them by us using Adobe eSign Manager? (particularly on mobile devices. For example, if they had CudaSign or DocuSign) We don't want to cause any inconvenience for our clients in having to download a particular app, or having to create any accounts anywhere just to sign one of our documents. Some clarity in this regards would be appreciated.