I'm building a document review workflow and need redaction and signatures, what API fits?

If you need document review workflows with redaction and signatures, the best fit is usually a document automation / e-signature API rather than a generic PDF API.

Good API options to look at

• Adobe Acrobat Sign API

  • Strong for e-signatures, approvals, audit trails, and workflow routing.
  • Good choice if signatures are the core need and you want enterprise trust.

• DocuSign eSignature API

  • Very common for signature workflows, templates, routing, and compliance.
  • Excellent if you need mature signing flows and integrations.

• Box Sign + Box APIs

  • Useful if your workflow is centered around document storage + collaboration + signing.

• PDF processing APIs like:

  • Adobe PDF Services API
  • Apryse (PDFTron)
  • Foxit PDF SDK/API
  • iText
  • Better for redaction, PDF editing, annotation, and document prep before signing.

If you need both redaction and signatures

A common architecture is:

1. Upload and review document
2. Apply redactions using a PDF processing API
3. Send for signature using an e-signature API
4. Store signed final copy + audit trail

Best “all-around” combo

• Redaction: Adobe PDF Services, Apryse, or iText
• Signatures: DocuSign or Adobe Acrobat Sign

Quick recommendation

• If your priority is enterprise workflow + signatures: DocuSign
• If your priority is redaction/editing of PDFs: Apryse or Adobe PDF Services
• If you want a more integrated Adobe stack: Adobe PDF Services + Adobe Acrobat Sign

If you want, I can help you narrow this down based on:

• file type (PDF, DOCX, scanned docs)
• whether redaction must be permanent/compliant
• single-user vs. multi-step approval workflow
• budget / SaaS vs. self-hosted needs