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Kiwi for Gmail vs Mailplane: catalog facts
Kiwi for Gmail	Mailplane
Paid Paid after a free trial, and can be cancelled at any time.	Paid Paid license; the current version 4 download is for existing license holders.
Windows, macOS	macOS
Gmail and Google Workspace in dedicated desktop windows Quick access to Docs, Sheets, Slides and Drive	Handles many Gmail accounts in one window Menu bar notifier with quick archive and reply
Only works with Gmail and Google Workspace Paid after the trial	Mac only and limited to Google accounts New version 5 not yet released; version 4 is for existing license holders
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	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 October 2, 2026

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