Assinafy - 2026 Pricing, Features, Reviews & Alternatives

Assinafy is an electronic signature software platform that enables organizations to digitally sign documents with legal validity while offering API integration capabilities. The platform serves a diverse range of industries including software development firms, legal practices, accounting offices, software as a service providers, online marketplaces, real estate agencies, financial technology companies, recruitment and human resources departments, educational institutions, marketing agencies, medical clinics, information technology service providers, insurance companies, travel agencies, hospitality businesses, and automotive services. Assinafy streamlines digital contract workflows by allowing documents to be uploaded, signatures to be collected, and files to be shared with multiple signatories through an online interface that replaces physical notarization and in person authentication.

The platform’s core functionality centers on document signing and distribution workflows. Users may upload documents and apply electronic signatures either through typed entries or handwritten signatures captured via mouse, stylus on mobile devices, tablets, or touchscreen inputs. An automated workflow distributes documents via email to designated signatories and enforces approval requirements prior to final validation. If any signatory disputes document content, the process is halted until revisions are completed and consensus is reached among all parties. Document templates can be branded with company logos and color schemes while accommodating any number of signatories per document.

Assinafy provides a full application programming interface designed for rapid integration into existing systems with minimal implementation effort. The API employs a representational state transfer architecture with endpoints for authentication and document management operations. Upon successful credential verification, session data is securely stored to manage subsequent requests. The platform’s security infrastructure leverages cryptographic techniques to safeguard document integrity and protect data throughout the signing lifecycle.

Electronic signature processes on the platform rely on digital certificates issued by accredited certification authorities to generate unique hash codes representing document content. Each hash is signed with a private key unique to each user account and verified using the corresponding public key to confirm both document integrity and signer identity. Compliance with the Brazilian public key infrastructure framework regulated by the national certification authority and oversight by the National Institute of Information Technology ensures that all signatures processed through the platform carry legal validity for contractual and official documentation.