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Mailbutler vs Mixmax: catalog facts
Mailbutler	Mixmax
Paid Subscription service with a 14-day free trial.	Freemium Free to start with no credit card; paid plans add more features.
macOS, Browser extension	Web, Browser extension
Works inside Apple Mail and Gmail Mail merge with scheduled sending	Works inside the Gmail interface Email sequences with per-person tracking
Email tracking reveals recipient activity, which some recipients object to Requires a subscription after the trial	Tied to Gmail and the Chrome extension Focused on sales outreach rather than general email
Downloadable app, Browser extension	Hosted service, Browser extension
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
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.