
Logseq
Obsidian
Zim Wiki
Nuclino
Trilium Notes
TiddlyWiki
Roam Research
Personal knowledge management and sharing on VSCode & GitHub

Beyond Compare
Meld
WinMerge
Araxis Merge
Devart Code Compare
Diff Checker
Diff Doc
A fast, precise desktop diff and merge tool for Windows, macOS, and Linux. Syntax-aware diffs, directory comparison, three-way merge, PDF comparison. Free tier available.
Which is more popular?
Based on our record, Foam seems to be more popular. It has been mentioned 49 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | foambubble.github.io | getdiffract.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
These panels DESTROYED my STUDIO....REVERB? - ArrowZoom Foam Review
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Foam and Diffract.
Diffract's answer:
Diffract is a purpose-built desktop diff tool that handles far more than plain text. A single app compares text, binary (hex view), images, PDFs, Word documents, Excel spreadsheets, ZIP/tar archives, and Git commits - all in a multi-tab interface. On top of the standard Myers diff, it offers Patience and Histogram algorithms per comparison, AST-based semantic diff that understands code structure (not just line changes), and automatic moved-block detection. It also runs fully headless as a CLI tool for use in CI pipelines.
Diffract's answer:
Diffract is purpose-built, so it supports file types (PDF, Word, Excel, archives), workflows (three-way merge, Git browsing, semantic diff), and UX features (drag-and-drop, OS context menus, in-panel editing with undo/redo, minimap, search) that e.g. an IDE's diff panel simply doesn't cover.
Diffract's answer:
Software developers and DevOps/SRE engineers who compare code, config files, and build artifacts daily. A secondary audience includes QA and release engineers who need to diff generated outputs and directory trees, and technical writers or analysts who compare Word documents, PDFs, or Excel exports without wanting a cloud-based or subscription tool.
Diffract's answer:
Flutter and Dart (cross-platform desktop UI, targeting Windows, macOS, and Linux).
Share your experience with using Foam and Diffract. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Choose a local Markdown tool like Obsidian, Logseq, Foam, or Tolaria to store all your knowledge as plain .md files you own and control. - Source: dev.to / 6 months ago
I've been using foam instead of obsidian for my personal knowledge base. It works rather well. And it's completely free and ultimately just markdown. While I might wish it was djot, I don't wish hard enough to make that so myself... - Source: Hacker News / about 2 years ago
I gave up on Obsidian and just use Foam (https://foambubble.github.io/foam/) and/or vimwiki. I just can’t get into overwrought, arbitrarily designed organization schemes or proprietary apps (Foam-managed content is just plain Markdown,... - Source: Hacker News / over 2 years ago
Tracking Diffract since May 2026.
When comparing Foam and Diffract, you can also consider the following products.

Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
Compare Logseq to Foam or Diffract:

Beyond Compare allows you to compare files and folders.
Compare Beyond Compare to Foam or Diffract:

A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
Compare Obsidian to Foam or Diffract:

What is Meld? Meld is a visual diff and merge tool targeted at developers.
Compare Meld to Foam or Diffract:

Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
Compare Zim Wiki to Foam or Diffract:

WinMerge is an open source differencing and merging tool for Windows.
Compare WinMerge to Foam or Diffract: