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TermFlow vs Zellij
Zellij is a modern, approachable multiplexer with the most structured controls of the bunch. TermFlow offers the same panes with a native GUI and a first-party MCP server the agent ecosystem speaks.
Two philosophies.
Zellij
The modern multiplexer.
A friendly, Rust-based take on tmux: floating and stacked panes, layouts, discoverable keybindings, and the most structured control surface of the multiplexers (JSON actions, an event stream, a plugin API, and a new browser client). Free and open source.
TermFlow
Panes with a GUI and MCP.
TermFlow covers the same panes and persistence, but as a native cross-platform GUI with a documented HTTP API and a first-party MCP server — the contract agents already use — rather than a terminal-hosted CLI action surface.
Feature by feature.
| Capability | TermFlow | Zellij |
|---|---|---|
| Platforms | Windows · macOS · Linux (native GUI) | Windows · macOS · Linux |
| Split panes & layouts | ✓ | ✓ |
| Floating & stacked panes | — | Yes ★ |
| Structured control surface | HTTP API + MCP | JSON actions + events |
| Built-in MCP server | ✓ | — |
| Native GUI | ✓ | — |
| Plugin API (WASM) | — | Yes ★ |
| Session persistence | ✓ | ✓ |
| Free & open source | Apache-2.0 | MIT |
Where Zellij wins
Zellij is the multiplexer we'd point a newcomer to: approachable, beautifully designed, with floating and stacked panes, a real WASM plugin API, and the most structured control surface of any multiplexer — and as of 0.44 (March 2026) it runs natively on Windows and adds remote sessions. If you want a keyboard-driven multiplexer that's easy to learn, it's a delight. TermFlow's difference is shape: a native desktop GUI rather than a terminal-hosted TUI, and a first-party MCP server plus HTTP API — the contract AI agents standardize on — rather than a CLI-and-plugin control surface.
Common questions.
Zellij has JSON actions and events — isn't that an API?
It's a strong scripting surface, and we like it. The difference is that agents standardize on MCP, which Zellij doesn't ship, and TermFlow is a native GUI rather than a terminal-hosted app.
Isn't Zellij cross-platform now too?
Yes — as of 0.44 (March 2026) Zellij runs natively on Windows, so we don't claim the OS list as our edge. Our difference is a native desktop GUI (not a terminal-hosted TUI) and a first-party MCP server the agent ecosystem speaks.
Is it free?
Yes, Apache-2.0 — API and MCP included, free on your machine. See pricing.