A Mimestream alternative with Google Calendar in the same window
Hark Mail is the same kind of app as Mimestream: a native Mac app that talks to Gmail through Google’s Gmail API, for Gmail accounts only. The difference is the other half of the window — Hark Mail has Google Calendar and Google Tasks built in, so your week sits one click from your inbox.
Side by side
Including the rows where Hark Mail is behind. Mimestream facts are from its own website, as of October 2026.
| Feature | Hark Mail | Mimestream |
|---|---|---|
| Built on the Gmail API | Yes | Yes |
| Native Mac interface | Yes | Yes |
| Full Google Calendar week view | Yes — a week view you can edit, in the same window | Invitation responses only; no built-in calendar |
| Google Tasks | Yes | Not listed among its features |
| Multiple accounts | One Gmail account per Mac during the beta; the unified inbox is built and switched off | Yes |
| Keyboard shortcuts | A few today — j, k, the arrow keys and Esc; more coming in updates | Yes — listed as a feature |
| Platforms | Mac (Apple silicon, macOS 14 or later); Windows next | Mac (macOS 12 or later); iPhone and iPad in beta |
| Price | Free during the beta; after it, 30 days free, then $5.99/month | $49.99/year or $4.99/month, 14-day free trial (as of October 2026) |
Mimestream does show calendar context: when an invitation arrives, a banner lets you respond and shows your agenda beside it. What it does not have is a calendar of its own — to see or change your week you open Google Calendar or another app.
Who should stay on Mimestream
- You use several Gmail accounts every day. Mimestream handles all of them today; Hark Mail connects one account per Mac during the beta.
- You run your mail from the keyboard. Mimestream lists keyboard shortcuts as a feature; Hark Mail’s set is small for now.
- Your Mac runs macOS 12 or 13. Mimestream supports macOS 12 or later; Hark Mail needs macOS 14 on Apple silicon.
- Your calendar already lives somewhere you like. If you are happy with a separate calendar app, Mimestream is an excellent mail client and there is little reason to move.
Who Hark Mail is for
- You want mail and calendar in one native window. Inbox, a full Google Calendar week view you can edit, and Google Tasks, without a second app or a browser tab.
- You live in one Gmail or Workspace account. That is what the beta supports, and it is where Hark Mail is complete today.
- You want your data to stay between your Mac and Google. Hark Mail has no server for your mail; it talks to Google directly from your Mac.
Questions
Is Hark Mail related to Mimestream?
No. They are independent products from different companies. Hark Mail is made by Souplin Labs LLC and is not affiliated with or endorsed by Mimestream.
Can I switch from Mimestream to Hark Mail?
Yes, and there is nothing to import. Both apps read your Gmail directly from Google, so your mail, labels and filters are already there when you sign in to Hark Mail. You can keep both installed while you decide.
How much does Hark Mail cost?
Hark Mail is free during the beta. After the beta it is free for 30 days, then $5.99 a month for the whole app — mail, calendar and tasks. Mimestream lists $49.99 a year or $4.99 a month (as of October 2026).
Does Hark Mail work with Outlook or iCloud mail?
No. Like Mimestream, Hark Mail works with Gmail and Google Workspace accounts only, through Google’s own APIs.
Mimestream is a trademark of its owner. Hark Mail is not affiliated with or endorsed by Mimestream. Comparison based on publicly available information as of October 2026.
Hark is in a free public beta.
macOS 14 or later on Apple silicon.
See the app — the window on the home page is the real interface, and you can change its accent and theme from the page.