The Real Cost of Open-Source PDF Libraries

Most teams don't see the full cost of open-source libraries until the next time something breaks.

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Your Open-Source Library vs Iron Software

What you have today vs. what you're switching to

OPEN-SOURCE

Free to adopt. Not free to keep

Engineering time you can't bill
Your time is lost to glue code, wrappers, and edge-case fixes. Waste of time rewriting codes & keeping it.
No SLA on security patches
When the next CVE drops, your team owns the fix.
Rendering gaps in production
Modern CSS, Flexbox, Grid, and JavaScript fail in legacy engines. Some libraries don't render HTML at all.
Nothing for procurement to sign
No vendor statement. The compliance answer is a GitHub readme.

IRON SOFTWARE

Iron Software fits now & every release after

Save Engineering time
Built-in production-ready APIs that reduce custom glue code, maintenance overhead, and monthly product releases.
Vendor-managed security
Active releases, patched CVEs, and security disclosures you can hand to audit.
Modern Chromium Rendering
Full HTML5, CSS3, Flexbox, Grid, and JavaScript support
Commercial license, OEM included
Redistribution, SaaS, embedding. Vendor statements available for audit.

Compare PDF libraries

Iron Software, PDFsharp, QuestPDF, PuppeteerSharp, and wkhtmltopdf at a glance

	IronSoftware	PDFsharp	QuestPDF	Puppeteer Sharp	wkhtmltopdf
Rendering engine	IronSoftware Chromium, embedded	PDFsharp None (coordinate API)	QuestPDF None (fluent API)	Puppeteer Sharp Chromium, external process	wkhtmltopdf QtWebKit, ~2012
HTML & CSS support	IronSoftware Full HTML5/CSS3, Flexbox, Grid, JavaScript	PDFsharp None natively (CSS 2.1 via add-on)	QuestPDF No HTML parser	Puppeteer Sharp Full (it is Chrome)	wkhtmltopdf Limited; no Flexbox or Grid
License	IronSoftware Commercial, perpetual from $999	PDFsharp MIT	QuestPDF Community under $1M revenue, then commercial	Puppeteer Sharp MIT	wkhtmltopdf LGPL, repository archived
Maintenance status	IronSoftware Active, regular releases	PDFsharp Active community	QuestPDF Active	Puppeteer Sharp Active	wkhtmltopdf Archived July 2024
Known unpatched CVEs	IronSoftware None outstanding	PDFsharp None inherent	QuestPDF None inherent	Puppeteer Sharp None, you manage Chrome	wkhtmltopdf CVE-2022-35583 (9.8), CVE-2020-21365 (7.5)
Operational overhead	IronSoftware NuGet only	PDFsharp NuGet only	QuestPDF NuGet only	Puppeteer Sharp Browser process, pooling, crash recovery	wkhtmltopdf Native binary management + CVEs
Vendor support	IronSoftware 24/7, real engineers	PDFsharp Community only	QuestPDF Community only	Puppeteer Sharp Community only	wkhtmltopdf None, abandoned
Audit / vendor statement	IronSoftware Available on request	PDFsharp None	QuestPDF None	Puppeteer Sharp None	wkhtmltopdf None

Outgrowing your open-source library?

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CVE patching, rendering, license, or scale.
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