Honestly: mbox versus the rest.

Pick a competitor to highlight their column in the table below.

See the full table

• Yes
• Partly, in a higher plan or with caveats
• No
• soonPlanned for mbox (see below)
• ?? = not verified, tell us

Feature comparison of mbox, Gmail with Gemini, Outlook with Copilot, Proton Mail, Polymail and Superhuman

Feature	mbox	Gmail + Gemini †	Outlook + Copilot †	Proton Mail	Polymail	Superhuman †
Privacy and security
End-to-end encryption (PGP)	Yes	No	Partly, in a higher plan or with caveats	Yes	No	No
Zero-access (encrypted at rest with your key)	Yes	No	No	Yes	No	No
Password-protected messages to anyone	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes	No	No
Hosting in Europe	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes	No	No
Own mailbox (not an add-on)	Yes	Yes	Yes	Yes	No	No
AI in your inbox
Thread summaries	Yes	Yes	Yes	No	Partly, in a higher plan or with caveats	Yes
Writing and rewriting	Yes	Yes	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes
Ask your inbox (Copilot)	Yes	Yes	Yes	No	No	Partly, in a higher plan or with caveats
Plain-language search	Yes	Yes	Yes	No	No	Yes
Promise detection in sent mail	Yes	No	No	No	No	No
Daily brief	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	No	No	Partly, in a higher plan or with caveats
Auto-triage (priority, categories, phishing)	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	No	Yes
AI on encrypted mail (one thread, one time)	soon — Planned for mbox (see below)	No	No	No	No	No
Work, tracking and sales
Send later and undo send	Yes	Yes	Yes	Partly, in a higher plan or with caveats	Yes	Yes
No-reply reminders	Yes	Partly, in a higher plan or with caveats	No	No	Yes	Yes
Open tracking	Yes	No	Partly, in a higher plan or with caveats	No	Yes	Yes
Click tracking	Yes	No	No	No	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats
Sequences and auto follow-ups	Yes	No	No	No	Yes	Partly, in a higher plan or with caveats
Meeting links	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	No	Yes	Yes
Share a conversation by link	Yes	No	No	No	Yes	Partly, in a higher plan or with caveats
Large files up to 2 GB via links with password and expiry, with document tracking †	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes	?	?
Teams and platforms
Custom domains	Yes	Yes	Yes	Yes	via mail provider	via mail provider
Shared inboxes with assignments and comments (Business)	Yes	Yes	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats
CRM sync	soon — Planned for mbox (see below)	Partly, in a higher plan or with caveats	Yes	No	Yes	Partly, in a higher plan or with caveats
Calendar with invites and RSVP	Yes	Yes	Yes	Yes	Partly, in a higher plan or with caveats	Yes
SSO / SAML	soon — Planned for mbox (see below)	Yes	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes
Connect other mailboxes (Gmail, Outlook, iCloud, Yahoo, IMAP) into one inbox with AI †	Yes	Partly, in a higher plan or with caveats	Yes	Partly, in a higher plan or with caveats	Yes	Yes
API, developer tokens, webhooks and an MCP server for AI agents †	Yes	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	?	?	?
IMAP/SMTP for desktop clients	soon — Planned for mbox (see below)	Yes	Yes	Partly, in a higher plan or with caveats	via mail provider	via mail provider
Desktop apps (PWA available, native soon)	Partly, in a higher plan or with caveats	Partly, in a higher plan or with caveats	Yes	Yes	Yes	Yes
Mobile apps (PWA with push available, native soon)	Partly, in a higher plan or with caveats	Yes	Yes	Yes	Yes	Yes
Admin console and audit log	Partly, in a higher plan or with caveats	Yes	Yes	Yes	Partly, in a higher plan or with caveats	Yes
Price
Free plan	Yes	Yes	Yes	Yes	No	No
All-in price with AI, per month	$5.90	~$14	~$30	$9.99	$24	~$30

† Our information on products marked with a dagger in the header, and in rows marked †, partly comes from our own knowledge rather than freshly fetched vendor pages. Treat it as indicative. A ? means we have not verified that feature for that vendor.

An estimate from public price lists as of 19 Oct 2026. Stacks vary and prices change. Honestly: mbox has no external CRM sync or native apps yet, and Pro has limits (for example 10 sequences).

• Screener

  A first-time sender waits for your decision before reaching your inbox. HEY popularised this idea and does it very well.

• Masked aliases

  A hide-my-email address for signing up around the web. Proton and Apple, among others, offer similar aliases.

• Paper Trail

  Receipts, orders and invoices land in their own place automatically. HEY has a very similar feature.

• Notes and tasks from email

  Turn a message into a task or a note with one key, no separate app.

• Rules and filters

  Automatic labels, moves and actions by your own rules.

• AI: translate and tone check

  Translate messages, check the tone before sending, plus auto-labels and auto-drafted replies.

• Voice dictation

  Dictate a message instead of typing it. AI tidies the text.

• People: a mini CRM

  Contact history, notes and keep-in-touch reminders. It is not an external CRM, but it is enough to start.

• Import and full export

  Import from Gmail and Outlook over IMAP, and export everything whenever you like.

• Push and an installable PWA

  Notifications on phone and desktop without an app store. Native apps are still to come.

• App passwords

  Separate passwords for sending from other programs over SMTP, revocable in one click.

• Login alerts

  A message when someone signs in from a new device.