Our ecommerce provider, MyCommerce (owned by Digital River Inc.) stopped paying us (and it appears, many others, see The Register) in August 2024.
We no longer trust any ecommerce provider. We do not have in-house expertise either in security or in tax regulations, so we are not able to handle payments ourselves. In view of this Qtrac Ltd. has now ceased trading, and will be wound up in due course.
We recommend that any customers with unacquired license keys acquire them as soon as possible. We hope to keep the website going for a while, and we hope to keep providing support as long as possible. All keys will continue to work as before. In particular, “full” keys will continue to work so long as the hardware/BIOS doesn't change, and annual keys will continue until their normal expiry date, regardless of hardware changes. Our software does not “phone home” and does not depend on our website. (In fact, some customers use our software entirely offline.)
We are very sorry for the inconvenience to our customers, and grateful for all those who have purchased our PDF comparison software over the past decade.
Qtrac Ltd. is selling its console command line PDF comparison
software,
comparepdfcmd. Although comparepdfcmd has proved a
successful product in its own right, it is is only a thin wrapper around
our Rust-based PDF comparison engine. This engine could also be used in
a GUI PDF comparison application, or to provide the back-end of a
web-based PDF comparison app. Interested parties should contact
mark@qtrac.eu for a prospectus.
"Your software is the best I've ever used for comparing PDFs.", —customer feedback.
Our commercial software is for sale or resale in the US and most countries outside Europe. (Why?)
DiffPDF — compare PDF files quickly and easily: Click to choose one PDF; click to choose another PDF; click Compare. The changes are shown as if you'd used highlighter pens to show added, changed, or deleted text.
This Windows application is our easiest to use and most affordable and popular product. Some customers report it as superior in functionality and far faster than Adobe Acrobat's Diff tool. Your PDFs are safely compared on your own computer without the size or page limits of online tools. Try free for 20 days or buy an annual license key for $149 USD. (See also Why Compare PDFs?)
comparepdfcmd — compare PDF
files. In a console (i.e., in a Command Prompt window opened by running
cmd.exe) enter, e.g.,
comparepdfcmd.exe -r report.pdf old.pdf new.pdf and see
any differences highlighted in report.pdf.
Cloud-free: your PDFs are safely compared on your own computer without
the size or page limits of online tools.
This commercial console (command line) program for Windows is ideal for more technical users doing testing, quality assurance, and scripted comparisons, and it is even faster than DiffPDF. Try free for 20 days or buy an annual license key for $199 USD. (See also Why Compare PDFs?)
C:\> comparepdfcmd.exe
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