| PDFluent | Foxit | |
|---|---|---|
| XFA Support | XFA 3.3 | Static + Dynamic |
| WASM Bundle | 3.8 MB Brotli (1.0.0, 2026-09-16) | See Foxit's Web SDK docs |
| XFA Forms — Static Rendering | ||
| XFA Forms — Dynamic Reflow | ||
| FormCalc ExecutionBasic FormCalc; not all functions | Partial | |
| SOM Path Resolution | Partial | |
| XFA Data Import / Export | ||
| XFA Flattening |
| PDF Parsing & Rendering | ||
| Text Extraction | ||
| AcroForms | ||
| Digital Signatures (PAdES) | ||
| PDF/A Validation & Conversion | ||
| PDF/UA Compliance | ||
| OCR | ||
| Redaction | ||
| ZUGFeRD / Factur-X | ||
| Office Conversion (DOCX/XLSX/PPTX) | Partial |
| Pure Rust coreFoxit is C++ | ||
| WebAssembly packageCheck Foxit's Web SDK documentation for what runs in the browser | Web SDK | |
| Mobile SDK (iOS / Android) | ||
| C API | ||
| Node.js bindings | ||
| Python bindings | ||
| Go bindings | ||
| MCP Host / AI integration | ||
| Public pricingFoxit requires a sales call |
PDFluent's WASM package (@pdfluent/sdk-wasm 1.0.0: 3.8 MB with Brotli, measured 2026-09-16) processes PDFs in the browser, on the edge, or in serverless functions without a server dependency. For Foxit's browser option, check its Web SDK documentation.
In safe Rust the ownership model rules out buffer overflows and use-after-free. Foxit's core is C++.
PDFluent implements the XFA 3.3 FormCalc specification, with gaps in locale-specific financial functions. Foxit supports a subset — edge-case scripts may behave differently.
PDFluent includes ZUGFeRD/Factur-X e-invoicing built in. Foxit has no e-invoicing support.
PDFluent pricing is on the website. Foxit requires a sales conversation before you know the cost.
PDFluent has no runtime to start first. C++ shared library load adds latency in cold serverless environments.
Foxit's XFA engine has a long record in enterprise deployments. Production-hardened edge cases take years to discover.
Foxit has native iOS and Android SDKs. PDFluent has no mobile offering. If you need PDF processing on device, Foxit covers it.
Foxit offers a broad feature set, including advanced annotation types, collaboration tools, and a broader set of output formats.
Major enterprise contracts give Foxit deep experience with high-volume, mission-critical deployments.
Foxit's MCP Host integration enables AI agent workflows over PDF documents — a recent capability PDFluent doesn't yet have.
Foxit has bindings for Go in addition to C, .NET, Java, Python, and Node.js.
Choose PDFluent if you need XFA in a Rust service, WASM browser environment, or serverless deployment. Also choose PDFluent if you need EU e-invoicing (ZUGFeRD/Factur-X) alongside XFA, or if you want pricing without a sales process.
Foxit is a good fit if you need XFA processing on mobile (iOS/Android), need Go bindings, or want an SDK with a long enterprise track record and a dedicated support team. Its C++ core has been tested against a very large volume of real-world XFA documents.
If you need XFA and a mobile SDK, Foxit is likely the better fit. PDFluent handles XFA in the browser via WebAssembly, on the edge, and in serverless environments, and supports EU e-invoicing alongside XFA. Foxit has been on the market longer.
Free under the AGPLv3, or a commercial licence if you would rather not publish your own source.