Overview

Diffract brings visual comparison and scripted diff workflows together. The free plan allows unlimited file and directory diffs, supports commercial use and works across any number of devices, so it can cover routine personal or business comparisons without a subscription. Redistribution is not permitted.

The maker says comparisons run entirely on the local machine and files never leave the computer. That is a useful fit for sensitive material, though organizations should still assess the tool against their own security requirements.

For category browsing, see Diff and Merge Tools and File Comparison Software.

Key features

Code and text comparisons

Syntax highlighting for more than 30 languages, word-level changes and moved-block detection help distinguish substantive edits from simple line changes. Collapsible unchanged regions reduce clutter in larger comparisons. This is useful for code review, but semantic code comparison is reserved for Pro.

Folders and binary files

Recursive directory comparison identifies added, removed and modified files, then lets users inspect changed content. Hex and binary comparison is included in Free, extending its usefulness beyond source text without requiring an upgrade.

Documents, Git and merging

Pro compares PDF, Word and Excel files; PDFs can be viewed with changes highlighted on the page or as extracted text. Git history browsing, commit comparison and Git difftool use suit developers who want comparison inside an existing workflow. Three-way merging presents local, remote and common-ancestor versions, a meaningful upgrade for resolving Git conflicts rather than merely spotting differences.

Command line and integrations

The CLI supports standard, Myers and patience algorithms for scripts, Git hooks and CI pipelines. OS context-menu integration adds a desktop route to comparisons, while remote URL comparisons require Pro. The combination is flexible, though users who only need a basic visual diff may not benefit from the paid workflow features.

Pricing

Plan	Price	What it includes
Free	0.00 USD per free (billed $0 forever)	Unlimited file and directory diffs, CLI and desktop app, syntax highlighting for 30+ languages, three diff algorithms, and hex/binary comparison.
Pro	34.00 USD per once (billed one-time purchase; per seat)	Three-way merge, PDF, Excel and Word comparison, semantic code comparison, Git integration and history browser, and all v1.x updates.

Free is the sensible choice for unlimited routine file and folder comparisons, including commercial use. Pro is aimed at people who need document diffs, Git history or three-way conflict resolution; the one-time per-seat price avoids recurring billing, but each key specifies a seat count and a version ceiling. The license covers versions only up to that ceiling, so it is not an assurance of access to every future release. A 7-day trial is offered. Purchase terms allow a full refund request within 30 days, handled by Paddle. The maker is not obligated to provide maintenance or technical support, although it invites questions and bug reports by email.

Platforms

Diffract is a desktop product for Linux, macOS and Windows, with a CLI for command-line workflows. Its broad desktop coverage is useful for mixed-platform teams; it is not a web-based comparison service.

Who it's for

Choose Diffract if you want one local tool for source, folders and binary files, or need the same comparison engine in desktop and scripted workflows. Free is especially practical when unlimited diffs and commercial use matter. Pro makes more sense for developers handling Git conflicts or users comparing Office documents and PDFs. It is less suitable if you need ongoing support commitments, a license without a version ceiling, or a cloud-based workflow.

Pros and cons

Pros: Free includes unlimited file and directory diffs, CLI access and binary comparison, covering a wide range of routine needs without a subscription.
Pros: Local processing keeps comparisons on-device, according to the maker.
Pros: Pro combines document comparison, Git history and three-way merging in a single per-seat purchase.
Cons: Pro licenses have a version ceiling, so buyers should check the key’s covered version range.
Cons: The maker has no obligation to provide maintenance or technical support, which may not suit teams that depend on guaranteed assistance.
Cons: Document comparison, semantic code comparison and Git features require Pro, limiting the free tier to core diff work.

Alternatives

Diffchecker is worth considering if you want a freemium option that also runs on the web; its free tier has monthly try-count limits on some features.
SourceGear DiffMerge is a free cross-platform alternative if you want a no-cost comparison tool rather than Diffract’s paid document and Git upgrades.
delta is a free, MIT-licensed choice for users who prefer a command-line tool installed through a package manager or executable download.
Meld is a free option for Linux and Windows users who do not need macOS support.
Code Compare is an alternative for Windows users who want a freemium code comparison product.
WinMerge is a free, open-source option if your work is limited to Windows.
mergers is a free cross-platform alternative.
Difftastic is a free alternative for users considering a different diff tool.

Verdict

Diffract is a strong fit for people who want a capable local diff tool that spans source, directories and binary files, with a free tier generous enough for ongoing commercial use. Choose Pro when document comparison, Git history or three-way merging will earn its one-time per-seat cost. Look elsewhere if guaranteed support or a version-unlimited license is essential.

	Diffract	Mergely
Free plan	Yes	No
Free trial	Yes	No
Paid from	Free	—
Open source	No	No
Platforms	Linux, macOS, Windows	Web
Free plan	Yes	Yes
Three-way merge	Yes	No
Folder comparison	Yes	—

Diffract vs Mergely

Diffract

Mergely