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ATAC vs Restish: catalog facts
ATAC	Restish
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, macOS, Linux, Command line	Command line
Full API client inside the terminal Optional Vim key bindings	Generates commands from an API's OpenAPI document Auth profiles with API keys, OAuth and mTLS
Still working toward its 1.0 release No graphical interface for people who prefer a mouse	Command line only Shell quoting needs setup to avoid rewriting queries and filters
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
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.