A software team chose ComPDFKit to build a document management system. The vendor pitch emphasized "comprehensive PDF features" and showed a polished demo with annotations, form filling, and digital signatures working smoothly. Three months into development, marketing requested invoice generation from HTML email templates. The team discovered ComPDFKit's core SDK doesn't include HTML-to-PDF conversion—that requires purchasing the separate HtmlConverter product with its own license. The "comprehensive" toolkit turned out to be a multi-product suite where each capability required evaluation of which component to license. ComPDFKit is a mature PDF SDK with strong viewer and editor features for building PDF applications. IronPDF is a unified library focused on HTML-to-PDF conversion and programmatic PDF manipulation. This comparison helps teams understand when UI-focused SDKs serve document viewer requirements versus when server-side HTML rendering drives the architecture.…