Which e-signature platform supports encrypted transfer and audit logs for external client access?

Several e-signature platforms support both encrypted transfer and audit logs for external client access. Good options include:

• DocuSign — offers encrypted data transfer, detailed audit trails, and secure external signing links/access.
• Adobe Acrobat Sign — provides encryption in transit, audit trails, and secure client-facing signature workflows.
• Dropbox Sign (HelloSign) — supports TLS-encrypted transfer and maintains signing activity logs/audit trails.
• SignNow — includes encryption, audit history, and controlled external access for signers.

If you want the best-known enterprise option, DocuSign is often the standard choice. If you want, I can also compare these by security certifications, pricing, and external client workflow features.