Apryse and Syncfusion both offer document processing SDKs, but they take fundamentally different approaches. Apryse is a specialized document technology provider with a proprietary rendering engine, client-side architecture, and native Office editing. Syncfusion is a broad UI component suite that includes document processing alongside hundreds of other tools. For teams evaluating Syncfusion for document-heavy workflows, Apryse provides deeper functionality, higher fidelity, and an architecture built for compliance-sensitive industries.
Quick Comparison
Company
600+ global employees with localized support
2,500+ global employees
Technology
One unified SDK that can be expressed cross-platform
1,800+ components/frameworks, features and maintenance vary by product
Viewing
Powerful client-side rendering with a deep feature set. Documents never leave the application
Multiple libraries, some requiring server backends to run. Inconsistent and sparse featuring
UI
Open-source, customizable via modular config or build from scratch by forking the UI
Closed-source, configurable via APIs. No option to fork or rebuild the UI independently
Server Processing
A single document engine that powers end-to-end PDF processing (generate, convert, OCR, secure, extract)
A broad selection of .NET libraries with some relying on external engines/packages
Office Editing
Native DOCX (OOXML) editing, XLSX editing
Proprietary SFDT (JSON) format for DOCX editing. Documents are converted to SFDT for editing, then back to DOCX for export. Users report formatting loss, broken tracked changes, and pagination differences vs. Microsoft Word
WCAG Compliance
WCAG 2.2 AA compliant
States that they “support most WCAG 2.2 guidelines”
Penetration testing
Annual, third-party penetration testing
Not publicly documented
Security Certifications
SOC 2 Type 2, ISO 27001, HIPAA, GDPR
SOC 2 Type 2, GDPR. no ISO 27001 claims for PDF libraries
Trusted by Leaders
Join the ranks of over 20,000 innovative start-ups, governments and Fortune 500 companies - including more than 85% of Fortune 100 companies that trust Apryse
Comparing PDF Viewer Libraries
The biggest architectural difference is where the PDF rendering happens. Apryse renders entirely in the browser. Syncfusion’s primary viewer routes through a server, affecting compliance, deployment complexity, latency, and overall user experience.
Documents stay in the browser
Apryse’s Web SDK renders PDFs client-side. The document never touches a server unless you explicitly send it there. For sensitive documents such as legal filings, medical records, or financial statements, this is a straightforward path to data compliance and security. One viewer, one rendering engine.
Apryse: The Only SDK Built for the Entire Document Lifecycle
Native DOCX Editing vs. JSON Conversion
Apryse edits DOCX natively using OOXML. The file that goes in is the file that comes out, no intermediary format, no fidelity loss. This is the safest architecture for documents that cross organizational boundaries: contracts, regulatory filings, compliance records.
Syncfusion's Document Editor requires a server backend to convert DOCX to a proprietary JSON format (SFDT – Syncfusion Document Template) for editing, then back to DOCX for export. The round-trip strips XML data such as formatting, layouts, tracked changes, and more.
Comparing Server Libraries
Apryse provides a powerful, cross-platform document engine that supports the full document lifecycle, while Syncfusion’s server components are primarily .NET libraries and docker-hosted Web APIs used to power select document operations
Structured Data Extraction
Apryse’s Smart Data Extraction structures outputs for key-value pairs, tabular data, headers, footers, paragraphs, and more into clean JSON, whereas Syncfusion only provides basic text extraction
“The performance of the Apryse SDK was excellent in terms of rendering times and editing task completion rates … [and] especially compared to other vendors that Dropbox has worked with in the past, the Apryse engineering support was just very responsive”
Sr Dropbox Product Manager, Amanda Lansman
Apryse vs. Syncfusion: Feature-by-Feature Comparison
Viewing
High performance viewer, side-by-side and multi-tab view modes, excels with complex files
Multiple viewer libraries with differing feature maturity, performance, and dependencies
Language Localization
30+ localizations, RTL UI and content interactions
33 localizations, RTL support for UI
UI Customization
Open-source modular UI, quick to extend or theme
Basic customization via APIs
UI Accessibility
Meets WCAG 2.2 AA guidelines
Supports “most WCAG 2.2 guidelines”
Annotations
Extensive OOTB annotations, deep customization, import/export
Standard OOTB annotations, basic customization, import/export
Search
Pattern search + index panel, SDK performance enhances handling of long docs
Basic string search in viewers, pattern/regex search only available via server
Forms
Create and fill with live editing
Create and fill forms, no live editing
Signatures
Live editing of created signature fields, works across all platforms
Basic filling, validation via server
Measurements
6 measurement types, snap-to-point, unit systems
5 measurement types, no snap to point
Redaction
Permanent redaction, pattern-based search & redact
Permanent redaction, pattern-based search & redact via server
PDF Content Editing
Edit text & images, deep rich text editing, highly responsive
Edit programmatic via .NET library
DOCX Editing
Native DOCX editing (no intermediate format)
JSON intermediary editor
Spreadsheet Editing
In-browser XLSX editing
Complete solution with excel-like editing experience
OCR
Modified version of Tesseract or Iris OCR
Basic tesseract
Text & Image Extraction
Extract plain text & images programmatically
Extract plain text & images programmatically
Key-Value Pair Extraction
ML-assisted KVP to JSON
N/A
Tabular Data Extraction
ML-assisted table detection to JSON/XLSX
N/A
Document Structure Extraction
Extract headers, paragraphs, lists, tables, etc to JSON
N/A
Document Classification
Page-level document classification with confidence scores
N/A
Barcode Extraction
Barcode decoding with preprocessing for skew/quality
Basic barcode reader
CAD Title Block Extraction
Extract standard and non-standard title block information from technical drawings to JSON
N/A
Template Generation
Generate via merging JSON data with PDFs, or from Office templates using Fluent
Mail merge templates in Word
Image Conversion
~30 image types including advanced (e.g. DICOM)
PDF to Image conversion via PDFium engine
Office Conversion
Industry leading conversion quality to and from Office
Only Office to PDF conversion
CAD Conversion
6 CAD file types
N/A
PDF/A Conversion
Create & validate PDF/A-1 to A-4
Conversion but no validation
Auto-Tagging
Adds/fixes tags using Apryse SDK, PDF/UA friendly output via iText
Adds tags to a newly generated PDF
Page Comparison
Side-by-side, overlay, semantic text, and image comparison
Image comparison
What Our Customers Say
"The speed at which they integrate is superior to their competition and their product roadmap has been good -- they’ve invested in the right things."
Marcus O'Brien
Global Head of Product Management, AutoCAD
"Apryse SDK [PDFTron] had particularly strong annotation and collaboration features, and their cross-platform approach allowed us to accelerate how we delivered products."
Sam Stuart
Senior Product Manager, Bentley Systems
"Apryse [PDFTron] demonstrated superior speed and functionality out of the box. In contrast, the competition took a lot of shortcuts and it was obvious in the user experience."
Alistair Michener
Founder and CEO, Drawboard
From Documents to Insights – Powering the AI Document Lifecycle
Enterprise AI initiatives depend on clean, structured data – but 80% of enterprise data is locked in unstructured documents. Apryse's SDK pipeline takes documents from ingestion to AI-ready output: view, extract, classify, and structure data from PDFs, Office files, and scanned documents into clean JSON. Deploy entirely on-premises or in air-gapped environments. Syncfusion's document libraries provide text extraction, but lack ML-assisted structured extraction, document classification, or RAG pipeline support.
Apryse vs Syncfusion
Smart Data Extraction
ML-assisted key-value pairs, tabular, and structured extraction to JSON. No templates required.
Text extraction only. No ML-based extraction.
Document Classification
19-category page-level classification
Not available
RAG Pipeline Support
Multiple OCR offerings, document classification, extract all elements of a PDF into ingestible formats such as JSON
Basic OCR, text, image, and form extraction
On-Prem AI Deployment
Fully self-hosted. Air-gapped environments supported. No cloud dependency.
Server libraries are self-hosted, but some features have external dependencies
Apryse is the top choice for document processing technology.
Backed by a Team of Experts
FAQ
Apryse is a specialized document processing SDK with a proprietary rendering engine, client-side WebAssembly architecture, and native Office editing. Syncfusion offers a broad set of document processing components primarily for web and .NET applications. Apryse focuses exclusively on document technology depth, Syncfusion prioritizes component breadth.
Yes. Apryse's PDF viewer uses a proprietary rendering engine that runs entirely client-side via WebAssembly. Documents never leave the browser, which simplifies compliance for regulated industries. The UI is open-source and WCAG 2.2 AA compliant, with support for 30+ file formats in a single viewer.
Syncfusion's traditional PDF viewer requires a server-side backend. In 2025, they introduced a standalone WebAssembly viewer using the open-source PDFium engine that does not require a server. However, their traditional server-dependent viewer remains their more feature-complete option.
Yes. Apryse's DOCX Editor works directly with the OOXML format – the native format of Word documents. No intermediary conversion is required. Syncfusion's Document Editor converts DOCX to a proprietary JSON format (SFDT) for editing, which can result in formatting and data loss during the round-trip conversion.
Both Apryse and Syncfusion hold SOC 2 certifications. Apryse additionally holds ISO 27001 and offers HIPAA-compliant deployment options with fully self-hosted, air-gapped infrastructure. Apryse's client-side architecture – where documents never leave the browser – simplifies compliance for industries like healthcare, finance, and government.