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ATAC vs Posting: catalog facts
ATAC	Posting
Free Free and open source under the MIT licence.	Free Free and open source under the Apache 2.0 licence.
Windows, macOS, Linux, Command line	Command line
Full API client inside the terminal Optional Vim key bindings	Works over SSH on remote machines Keyboard-centric interface
Still working toward its 1.0 release No graphical interface for people who prefer a mouse	Terminal only, no graphical version Needs a Python environment to install
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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