Proposal & eSignature platforms combine proposal creation, collaborative editing, and electronic signature capture — enabling sales teams to generate branded proposals, track buyer engagement, and close deals with legally binding signatures in a single workflow. Core capabilities include proposal template libraries, drag-and-drop content assembly, interactive pricing tables, buyer engagement tracking, collaborative commenting, integrated e-signature with audit trails, and integration with CRM, CPQ, and billing systems. The category spans proposal-first platforms (PandaDoc, Proposify, Qwilr, Better Proposals) and e-signature platforms with proposal features (DocuSign, Adobe Acrobat Sign).