Kitty

Kitty is a GPU-accelerated terminal emulator for macOS and Linux designed for keyboard-driven workflows. Offloading text rasterization to the graphics card via OpenGL and parsing byte streams with SIMD vector instructions, it renders high-volume log streams without dropping frames. Built-in window tiling, session persistence, and an extensible kitten runtime provide a full developer environment without an external multiplexer.

Why Kitty instead of Termius

Termius organizes remote infrastructure through cloud accounts, graphical host trees, visual port forwarding, and mobile applications. This setup suits administrators who want a point-and-click connection directory that synchronizes credentials across workstations and phones. However, Termius relies on proprietary cloud infrastructure for configuration sync and encloses sessions in a fixed graphical interface detached from local shell dotfiles.

Kitty approaches terminal work through local execution, keyboard navigation, and Unix composability. Configuration lives in a local kitty.conf file versioned in Git repositories, while remote connections rely on OpenSSH or kitten ssh, which automatically copies terminfo files and activates shell integration on remote hosts. Choosing Kitty means giving up cloud-synced credential vaults, mobile apps, and graphical SFTP panes. In return, developers and DevOps engineers gain sub-millisecond input response, native window tiling, and a terminal that operates entirely offline without proprietary subscriptions.

What it does well

• Hardware-accelerated rendering and SIMD parsing: Uses OpenGL to offload glyph rasterization to the GPU and parses escape sequences with vector instructions, handling high-volume logs at display refresh rates.
• Native window tiling: Manages splits, tabs, and layouts like grid and stack directly inside the emulator, eliminating the need for an extra multiplexer layer.
• Modern graphics and keyboard protocols: Supports the Kitty graphics protocol for inline plots and images alongside the Kitty keyboard protocol for unambiguous modifier key reporting.
• Extensible kitten ecosystem: Bundles terminal utilities like icat for inline media display, kitty-diff for side-by-side Git diffs, and hints for keyboard-driven regex URL selection.