Glassmail vs Mimestream: native Mac email apps compared
Mimestream is the best native app if you only use Gmail. Glassmail is native too, works with every account, and adds private on-device AI.
Short answer: if every account you have is Gmail and you want the deepest Gmail integration, Mimestream is excellent. If you also have iCloud, Outlook, Yahoo, Fastmail or a custom domain, want AI that runs on your Mac, or prefer paying once to a yearly subscription, Glassmail is the better fit.
Both are real native Mac apps written in Swift, not web pages in a window, so both feel fast and at home on macOS.
At a glance
| Glassmail | Mimestream | |
|---|---|---|
| Price | $49 once (lower launch prices for early buyers) | $49.99 a year or $4.99 a month |
| Accounts | Gmail, iCloud, Outlook, Microsoft 365, Yahoo, Fastmail, any IMAP | Gmail and Google Workspace only |
| How it connects to Gmail | IMAP with an app password | Gmail API |
| Gmail-specific features | Labels as folders | Labels, categories, filters, vacation responder, aliases |
| AI | Assistant, summaries and writer, on your Mac | None built in |
| People vs updates | Automatic split, updates bundled by sender | Gmail’s own categories |
| Platforms | Mac (macOS 14+) | Mac |
Mimestream details from its website and FAQ, November 2026. Disclosure: Glassmail is our app. Tell us at hi@glassmail.app if anything here is wrong.
Gmail depth vs every account
Mimestream talks to Gmail through Google’s API, which lets it manage filters, categories and other Gmail settings that IMAP apps can’t reach. That depth is its strength, and the reason it only supports Gmail.
Glassmail uses IMAP, the standard every provider speaks, so one app holds your work Gmail, personal iCloud and anything else. You add Gmail with an app password, which takes about two minutes.
AI
Mimestream has no AI features. Glassmail includes a private assistant (“what needs me today?”), thread summaries and a writer that learns your tone, all running on your Mac with Apple Intelligence or a small downloaded model. Nothing is sent to an AI company. How it works.
Price over time
Mimestream is $49.99 every year. Glassmail is $49 once, for up to three Macs and every 1.x update. After the first year Glassmail costs less, and the gap grows each year.
Which should you choose?
- Choose Mimestream if you only use Gmail and want to manage filters, categories and Gmail settings from a native app.
- Choose Glassmail if you have more than one kind of account, want private AI built in, or prefer to pay once.
Glassmail is free for 14 days. Also see how to see all your email accounts in one inbox.
Quick answers
Does Mimestream support Outlook or iCloud?
Not as of November 2026. Mimestream's FAQ says it supports Gmail only, with Microsoft 365 and Outlook listed as planned. Glassmail, Apple Mail and Spark support Gmail, iCloud, Outlook and IMAP accounts.
How much does Mimestream cost?
Mimestream is $49.99 a year or $4.99 a month, after a free trial. Glassmail is a one-time $49, with lower launch prices for early buyers.
Which is better for Gmail, Glassmail or Mimestream?
For Gmail alone, Mimestream supports more Gmail-specific features, such as editing filters, categories and labels through Google's API. Glassmail connects to Gmail over IMAP, supports labels as folders, and is better if you also use other providers or want on-device AI.