iText by Apryse vs. Nutrient SDK

Now part of the Apryse family, iText is one of the best-documented and most versatile PDF SDKs in the world. The open-source iText Core library features a powerful layout engine and intuitive high-level APIs for document creation and manipulation, digital signing and validation, and much more. It has built-in support for PDF 2.0, all variants of PDF/A and PDF/UA, FIPS-140-2 and the very latest ISO standards for digital signatures and encryption.

Nutrient SDK (formerly PSPDFKit and ORPALIS) is a document SDK that provides developers with a set out-of-the-box tools to add advanced functionality like PDF viewing, annotation, signing, form fill, and more to their applications. 1. PDF SDK PRODUCTS Our SDK lets you focus on shipping features and not on building PDF software. Accelerate product innovation by integrating prebuilt solutions like PDF viewing, signing, annotating, and editing directly in your web, mobile or desktop app. 2.