Deff
Side-by-side Git diff review in your terminal
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deff is an interactive Rust TUI for reviewing git diffs side-by-side with syntax highlighting and added/deleted line tinting. It supports keyboard/mouse navigation, vim-style motions, in-diff search (/, n, N), per-file reviewed toggles, and both upstream-based and explicit --base/--head comparisons. It can also include uncommitted + untracked files (--include-uncommitted) so you can review your working tree before committing.Would love to get some feedback
HN · launched Feb 26, 2026 · 120 upvotes (top 9%) · 1 view
Niche: git management and workflow tools · 221 launches, 11 in the last 7 days ▼ -31% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 221 launches in git management and workflow tools →
Could you build this?
Yes A Rust TUI tool for side-by-side git diff inspection using standard libraries like `ratatui` and `syntect` is a classic CLI project well-suited for AI generation.
Discussion
20 comments analyzed.
Competitors mentioned: codediff.nvim, lazygit, vim-fugitive, IntelliJ diff tool, Critique
Concerns raised: Requires JavaScript (comparing to web alternatives), Lacks muscle memory from existing editor configurations, Security/usability tradeoffs with modern tools, Terminal emulator performance and feature parity
Feature requests: Show moved code blocks detection, cargo-binstall support, Render diffs to images/PDF/HTML formats
Competitors
Other products that read as similar to this one : 260 launches clear the similarity bar, closest 8 shown.
Attention rank: #27 of 261 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 119 days after the earliest competitor.
- Diffswarm · hn · 2026-01-06 · 8 upvotes · similarity 0.58
- CodeDiff · hn · 2026-09-29 · 7 upvotes · similarity 0.54
- OmniDiff · hn · 2026-11-01 · 319 upvotes · similarity 0.52
- caddiff · github · 2026-10-04 · 51 upvotes · similarity 0.52
- DiffCue · ph · 2026-10-15 · 2 upvotes · similarity 0.52
- Revdiff · hn · 2026-04-12 · 17 upvotes · similarity 0.51
- MyGitDiff · github · 2026-09-10 · 7 upvotes · similarity 0.51
- MergeDock · ph · 2026-09-22 · 2 upvotes · similarity 0.49
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