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Mailmeteor vs Mailbutler: catalog facts
Mailmeteor	Mailbutler
Freemium Free plan available, with paid plans for more features.	Paid Subscription service with a 14-day free trial.
Web, Browser extension	macOS, Browser extension
Mail merge directly from Gmail, Outlook and Google Sheets Open tracking and deliverability safeguards	Works inside Apple Mail and Gmail Mail merge with scheduled sending
Sending volume is bounded by quotas and provider limits Requires connecting your email account to the service	Email tracking reveals recipient activity, which some recipients object to Requires a subscription after the trial
Hosted service, Browser extension	Downloadable app, Browser extension
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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