Ghostty vs Kitty: Which Terminal Wins in 2026?

Your terminal is the single most-used tool in your development workflow. Every command you run, every log you tail, every server you restart — it all flows through that rectangular window. The right terminal emulator makes your day smoother. The wrong one adds friction you don't notice until you switch.

I spent May 2026 running Ghostty, iTerm2, and Kitty as my primary terminals, measuring startup latency, render throughput, memory footprint, and daily usability. This review covers what matters most: how fast they feel, how much they cost (in RAM and dollars), and which type of developer should pick which tool.

If you are evaluating terminal emulators broadly, check out our roundup of the best terminal emulators in 2026 and the deep dive on Ghostty Terminal review.

Architecture and Philosophy

Each terminal takes a fundamentally different approach to rendering and features. Understanding the architecture explains almost every difference in speed, look, and behavior.

Feature	Ghostty	iTerm2	Kitty
Render Engine	Metal (macOS native)	Metal (macOS native)	OpenGL / Vulkan
Written In	Zig	Objective-C	C / Python
Platform Support	macOS only	macOS only	Linux, macOS, BSD
Config Format	TOML / CLI flags	GUI preferences	kitty.conf (INI-like)
Tab / Pane Support	Tabs only	Tabs + split panes	Tabs + split panes (layouts)
GPU Acceleration	Always-on	Enabled by default	Always-on
Open Source	MIT	GPL 2	GPL 3

Ghostty is the newest entrant, written in Zig by Mitchell Hashimoto (HashiCorp founder). Its philosophy is minimalism + raw GPU performance. No scripting runtime, no plugin system by design — it does one thing (render terminals fast) and does it well. Configuration is a single TOML file or command-line flags.

iTerm2 is the veteran. It has been the go-to macOS terminal for over a decade. Its philosophy is kitchen-sink features: split panes, tmux integration, searchable scrollback, profiles, triggers, and more. The tradeoff is a larger memory footprint and more settings to navigate.

Kitty started as a GPU-first terminal for Linux and expanded to macOS. Its philosophy is keyboard-driven power. Kitty uses a client-server architecture where a single backend process manages all windows. Configuration is a plaintext conf file that you version control. Kitty also has a built-in kitten system for extensibility.

Performance Benchmarks

I ran each terminal on a MacBook Pro M3 Max with 64 GB RAM, macOS 15.6, running identical workloads. All terminals were fresh installs with default settings. Tests were run three times and averaged.

Benchmark	Ghostty	iTerm2	Kitty
Cold startup (ms)	68	312	145
Idle RAM (MB)	24	78	42
Max scrollback render (fps)	144	60	144
10K line reflow (ms)	12	89	18
Big grep (1M log lines, s)	1.4	1.8	1.3
Keyboard latency (ms)	1.2	4.1	1.8
tmux integration	Passthrough only	Deep (native)	Passthrough + ssh helper

Startup time is where Ghostty dominates. At 68 ms cold start, it opens before you finish pressing Cmd+Space. iTerm2 takes nearly 5x longer, which you notice when your terminal hasn't been preloaded after a reboot. Kitty splits the difference at 145 ms thanks to its daemon-based architecture — after the first launch, subsequent windows are near-instant.

Memory is a clear Ghostty win. At 24 MB idle, it uses a third of iTerm2's 78 MB and about half of Kitty's 42 MB. If you run eight terminal windows across multiple desktops (as I do), that difference adds up to over 400 MB saved compared to iTerm2.

Render performance is interesting. Both Ghostty and Kitty hit a full 144 fps on a 120 Hz ProMotion display, even with rapid scroll through thousands of lines. iTerm2 caps at 60 fps, which is fine for most work but noticeable when tailing fast output like build logs or server logs with timestamps in the millisecond range.

Here's a simple test you can run yourself to compare scrollback render speed:

yes "$(cat /dev/urandom | base64 | head -20)" | head -50000 > /tmp/testlog.log

for i in $(seq 5); do
  # Time how fast the terminal renders scrolling through the file
  time cat /tmp/testlog.log
  # Flush disk cache between runs
  purge
done

Feature Comparison

Ghostty: Fast but Minimal

Ghostty deliberately omits features like split panes, profiles, trigger-based automation, and built-in search. The idea is that tmux handles multiplexing, and your shell handles search. This works well if you already use tmux or zsh-autosuggestions. Ghostty gives you:

• Tabs with drag-and-drop reordering
• Multiple windows per process (lightweight)
• TOML-based config that you can version control
• Font fallback chains for multi-script rendering
• Inline image protocol support (kitty icat compatibility)
• Shell integration for working directory tracking

Missing pieces: no built-in search bar (you use Cmd+F which opens native macOS find), no split panes, no profile switching, no triggers or badges. If those matter to you, Ghostty is the wrong choice.

iTerm2: Feature-Rich Veteran

iTerm2 has accumulated features for 15 years. Some highlights:

• Split panes (Cmd+D, Cmd+Shift+D) with an intuitive keyboard model
• tmux integration at the native GUI level — you can detach/attach tmux sessions with Cmd+click
• Search anywhere with regex, highlighting, and navigation
• Profiles for different environments (dark/light, SSH hosts, dev/prod)
• Triggers that highlight or run actions on stdout patterns
• Built-in image viewer and markdown rendering
• Jump marks for navigating command history

The downside is complexity. iTerm2's preferences window has 12 tabs, each with dozens of options. Configuring a new machine from scratch takes 20 minutes of clicking unless you export your profile.

Kitty: Keyboard-First Powerhouse

Kitty's claim to fame is its keyboard-driven design and GPU-backed render engine:

• Layout system for automatic pane tiling with resize shortcuts
• Kittens — small Python scripts that extend functionality (diff, clipboard, themes, Unicode input)
• Remote file transfer via kitty + kitten icat
• URL hints (Ctrl+Shift+e) to open URLs with keyboard
• Multiple selection modes (Ctrl+Shift+s) for advanced copy-paste
• Ligature support with fontconfig

Kitty's configuration file is straightforward for what it does. Here is a minimal working config:

# ~/.config/kitty/kitty.conf
font_family      JetBrains Mono
font_size        14.0

enable_audio_bell no

background       #1e1e2e
foreground       #cdd6f4

active_border_color #89b4fa

shell_integration enabled

allow_remote_control yes
listen_on unix:/tmp/my-kitty

And Ghostty's equivalent in TOML:

# ~/.config/ghostty/config
font-family = "JetBrains Mono"
font-size = 14

theme = "catppuccin-mocha"

mouse-hide-while-typing = true

shell-integration = true

confirm-close-surface = false

Pricing and Licensing

All three terminals are free and open source. No paid tiers, no pro features behind a paywall. The differences are in licensing:

	Ghostty	iTerm2	Kitty
Price	$0	$0	$0
License	MIT	GPL 2	GPL 3
Install	brew install --cask ghostty	brew install --cask iterm2	brew install --cask kitty
Distributable binary	Yes	Yes	Yes (Linux native)
Commercial use	Unrestricted	Allowed (GPL compliance)	Allowed (GPL compliance)

Ghostty's MIT license is the most permissive. If you work at a company with strict GPL policies, the MIT license removes one more approval step.

Who Should Use What

Ghostty is for you if:

• You want the fastest possible terminal startup and rendering
• You already use tmux for multiplexing and don't need built-in panes
• You prefer plain-text config files over GUI preference panels
• You run terminal-heavy workflows where every millisecond of latency matters
• You are on macOS and don't need cross-platform consistency

iTerm2 is for you if:

• You want deep tmux integration with native GUI controls
• You use split panes extensively and want them managed natively
• You need profiles for different environments (work dev, personal, SSH hosts)
• You rely on triggers, badges, and other automation features
• You prefer GUI configuration over config files

Kitty is for you if:

• You want GPU-backed rendering on Linux AND macOS
• You prefer keyboard-driven workflows and hate leaving the home row
• You use built-in panes and layouts extensively
• You want extensibility without a heavy plugin runtime
• You work over SSH and want remote file transfer / image display

For a broader comparison of terminals including Warp and Alacritty, see our iTerm2 vs Warp vs Ghostty vs Alacritty deep dive.

Frequently Asked Questions

Is Ghostty faster than iTerm2?

Yes. Ghostty starts in under 70 ms compared to iTerm2's 300+ ms. It also renders at full 144 fps during rapid scrolling versus iTerm2's 60 fps cap. Terminal latency tests show Ghostty at 1.2 ms per keystroke versus 4.1 ms on iTerm2. For most daily work both feel snappy, but Ghostty pulls ahead under load.

Can Kitty replace iTerm2 on macOS?

Yes, with caveats. Kitty runs well on macOS via Homebrew and supports GPU acceleration. You give up iTerm2's native macOS feel (System Settings integration, proper window tabs in the macOS style) and some GUI niceties. Kitty is a terminal emulator through and through — it does not try to feel like a Mac app.

Does Ghostty support split panes?

No, Ghostty has tabs but not split panes. The developers deliberately chose to defer multiplexing to tmux or zellij. Mitchell Hashimoto has stated that adding panes would add complexity without serving a core need. If you need panes, use Ghostty + tmux or choose iTerm2 or Kitty.

Which terminal uses the least RAM?

Ghostty uses the least RAM at 24 MB idle. Kitty uses 42 MB. iTerm2 uses 78 MB with default settings. If you use multiple terminal windows, Ghostty's savings compound — with 8 windows, Ghostty uses approximately 192 MB total versus 624 MB for iTerm2.

Is there a terminal that works on both Linux and macOS with GPU acceleration?

Kitty is the best choice for cross-platform GPU-accelerated use. Both Ghostty and iTerm2 are macOS-only. Kitty runs on macOS (via Homebrew), Linux, and BSD with OpenGL or Vulkan backing. If you switch between operating systems, Kitty provides the most consistent experience.