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Tabby vs iTerm2: catalog facts
Tabby	iTerm2
Free Free and open source under the MIT licence.	Free Free and open source under the GPL.
Windows, macOS, Linux	macOS
Local shells, SSH, Telnet and serial connections in one program Encrypted container for SSH secrets and configuration	Instant replay and shell integration make past output easy to recover Native tmux control mode turns tmux windows into real tabs
Electron, so start-up and memory use are well above a native terminal The plugin ecosystem is small	macOS only So many settings that first-time configuration is daunting
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.