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UPDF alternatives · PDF Editors

Open-source alternatives to UPDF

UPDF is not described as open source on its own site. 4 of the 45 other PDF editors in this directory are open source, according to their own sites.

UPDF is a paid product with a free trial, starting at $49.99 per year (US App Store). All of them are free or have a free plan.

4 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from UPDF

  1. PDFsam

    Split and merge PDFs offline, with paid Visual and Enhanced editions

    • PDFsam starts at $34.90 per user / year (PDFsam Visual); PDFsam Basic is free. UPDF starts at $49.99 per year (US App Store).
    • PDFsam has a free plan. UPDF does not, though it has a free trial.
    • Only PDFsam lists a Linux app.
    • Only UPDF lists iOS and Android apps.
    PDFsam pricing and details

  2. Stirling PDF

    Open-source PDF editor you can run on your own machine or server

    • Stirling PDF starts at $99 per month for 100 users (Team). UPDF starts at $49.99 per year (US App Store).
    • Stirling PDF has a free plan. UPDF does not, though it has a free trial.
    • Only Stirling PDF lists a web app.
    • Only Stirling PDF lists a Linux app.
    Stirling PDF pricing and details

  3. Skim

    Free PDF reader and note-taker for Mac, built for papers

    • Skim is free. UPDF starts at $49.99 per year (US App Store).
    • Skim has a free plan. UPDF does not, though it has a free trial.
    • Only UPDF lists Windows, iOS and Android apps.
    • Skim is open source, according to its own site.
    Skim pricing and details

  4. SumatraPDF

    Small, free PDF, eBook and comic reader for Windows

    • SumatraPDF is free. UPDF starts at $49.99 per year (US App Store).
    • SumatraPDF has a free plan. UPDF does not, though it has a free trial.
    • Only SumatraPDF lists a web app.
    • Only UPDF lists macOS, iOS and Android apps.
    SumatraPDF pricing and details

Common questions

Is there an open-source alternative to UPDF?

Yes. PDFsam, Stirling PDF, Skim and SumatraPDF are open source, according to their own sites.

Is UPDF open source?

UPDF is not described as open source on its own site. The listing was checked on Oct 18, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to UPDF: the alternatives its listing names first, then the tools that share the most features with it.