Ratatui
Modern Rust TUI (Terminal UI) framework, the maintained fork of tui-rs. Provides an immediate-mode rendering API with composable widgets (Block, Paragraph, Table, Chart, Gauge, List, Canvas) and flexible layout system. Backends support crossterm, termion, and termwiz. Powers many popular Rust terminal applications including lazygit alternatives, log viewers, and monitoring dashboards.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Terminal UI library — no network access, no security concerns.
⚡ Reliability
Best When
Building full-featured Rust terminal applications with complex layouts, widgets, and real-time updates.
Avoid When
You only need simple prompts or progress bars — indicatif or dialoguer are simpler.
Use Cases
- • Build full-featured terminal dashboard applications in Rust with charts, tables, and real-time data updates
- • Create log viewer TUI tools with scrollable text areas, filtering, and search highlighting
- • Implement monitoring dashboards with sparklines, bar charts, and gauge widgets
- • Build file manager or git TUI tools with split-pane layouts and keyboard navigation
- • Create interactive testing and debugging UIs for Rust services with live metric display
Not For
- • Simple progress indicators or spinners — use indicatif for that; ratatui is for full TUI applications
- • Interactive form-based CLIs — use dialoguer for simple prompts; ratatui for complex forms
- • Web or GUI applications — ratatui is terminal-only
Interface
Authentication
Library — no auth needed.
Pricing
MIT licensed open source library. Community-maintained fork of tui-rs.
Agent Metadata
Known Gotchas
- ⚠ Ratatui uses immediate-mode rendering — every frame redraws everything; don't store widget instances between frames
- ⚠ Terminal must be restored on exit — use a panic hook to restore terminal: std::panic::set_hook(Box::new(|_| { restore_terminal(); }))
- ⚠ crossterm::terminal::enable_raw_mode() must be called before rendering — forgetting this causes input to be echoed and terminal controls to malfunction
- ⚠ Layout uses Constraint enum — Percentage, Min, Max, Length, Ratio; understanding constraint priority is key for responsive layouts
- ⚠ Unicode width handling requires unicode-width crate for accurate terminal character measurement — ASCII-only width estimation will misalign CJK characters
- ⚠ ratatui 0.26+ unified the event handling — older tui-rs examples may have different crossterm event loop patterns
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Ratatui.
Scores are editorial opinions as of 2026-03-06.