PostageMimestream vs Superhuman: Which Mac Email App Fits?
Checked November 3, 2026
Pick Mimestream if all your mail is Gmail and you want a native Mac app: $4.99 a month or $49.99 a year. Pick Superhuman if your team runs on Gmail or Outlook and wants its built-in AI assistant, priced per member. If you have iCloud, Fastmail or your own domain too, or want Claude and Codex in your mail, look at Postage: any IMAP account, $39 once.
At a glance
| Mimestream | Superhuman Mail | Postage | |
|---|---|---|---|
| What it is | "A native macOS email client for Gmail" | "AI-native email" for Gmail and Outlook teams | Native Mac email client for any IMAP account, with an MCP server for agents |
| Accounts | "All your Google accounts" | Gmail and Outlook | Gmail, iCloud, Fastmail, Yahoo, your own domain |
| AI | Not listed on its site | Built-in Email Assistant: sorts mail, drafts replies, follow-ups | None built in; your own agent (Claude, Codex, Cursor) connects over MCP |
| AI agents (MCP) | Not listed on its site | Mail MCP on Business and Enterprise plans | Built in, runs on your Mac |
| Price | $4.99 a month or $49.99 a year | Pro $12 per member a month billed yearly ($15 monthly); Business $33 ($40 monthly) | $39 once |
| One-time purchase | No, subscription only | No, per-member plans | Yes |
Choose Mimestream if
Every account you have is Gmail, you want Gmail's own features (labels, categories, filters) through the Gmail API, and you want an app built only for the Mac. It runs on macOS 12 Monterey and later.
Choose Superhuman if
Your team is on Gmail or Outlook and wants AI inside the mail app: Superhuman's Email Assistant sorts incoming mail, drafts replies in your voice and reminds you to follow up. Its Mail MCP, which lets Claude or ChatGPT reach your Superhuman mail, comes with the Business and Enterprise plans.
When neither fits: other accounts, or your own AI agent
- You have more than Gmail and Outlook. Postage puts iCloud, Fastmail, Yahoo and work domains in one inbox, next to Gmail.
- You already use Claude Code, Claude Desktop or Codex. They connect to Postage's MCP server with the accounts they're signed in to. They search, sort and draft; you press Send. See how to connect Claude to your email.
- You'd rather pay once. $39, no subscription, no per-member price.
One-on-one comparisons: Postage vs Mimestream and Postage vs Superhuman.
Questions
Is Mimestream or Superhuman better for Gmail on a Mac?
Mimestream is built only for Gmail and only for the Mac, sold as a subscription. Superhuman covers Gmail and Outlook with an AI assistant, sold per member. For one person on Gmail who wants a Mac app, Mimestream is the closer fit; for a team that wants built-in AI, Superhuman.
Does Mimestream have AI?
Mimestream's site doesn't list AI features or an MCP server. Postage has no AI built in either, but lets Claude, Codex and other agents work in your mail through its MCP server.
Do Mimestream or Superhuman support iCloud Mail?
Mimestream lists Google accounts and Superhuman names Gmail and Outlook; neither lists iCloud. Postage supports iCloud, Fastmail, Yahoo and any IMAP account.
Which one is a one-time purchase?
Neither. Mimestream is subscription only and Superhuman is priced per member. Postage is $39 once.
Get Postage
A fast, native Mac email client with the MCP server built in. $39 once, no subscription.
One-time purchase, no subscription. Notarized by Apple. macOS 14 Sonoma or later.