MyECheck, Inc. (fka MYEC)

[MODiFiEDZ]

The biggest difference sounds like unlimited pages can be sent at one time. The businesses Simplifile caters to often need dozens or even hundreds of pages reviewed & recorded per process.
I used a similar service when purchasing a house recently, Simplifile simplifies the process of having to sign dozens of documents, something that would be a hassle to accomplish via email.
The best part is Simplifile never deletes the documents so both parties always have access, emails can get lost & accounts get hacked & eventually deleted.