What is SuperMailOS used for?

SuperMailOS is a business email service that puts every domain you own in one inbox, with free unlimited aliases, shared mailboxes and replies from the right address. It is a good fit for running email for several brands from one login, giving a team a shared support address and moving business mail off a patchwork of providers.

How much does SuperMailOS cost?

Paid plans for SuperMailOS start at $4 per seat per month, and there is no free plan. A free trial is available.

Is SuperMailOS open source?

No. SuperMailOS is proprietary (closed-source) software and can't be self-hosted. In the Email Clients & Servers category, open-source options include Mailspring, Roundcube and FairEmail.

What are some alternatives to SuperMailOS?

SuperMailOS competes with ImprovMX, Fastmail and Zoho Mail.

SuperMailOS: features, pricing and alternatives

About SuperMailOS

SuperMailOS is for people who run more than one site or company. Mail for all of a user's domains lands in a single inbox that can be filtered to one domain in a click, a reply to hello@studio.dev leaves from that same address, and unlimited aliases such as hello@ or billing@ are free. Shared mailboxes let teammates use addresses like support@ or billing@ without sharing a password.

Mail features include snooze, filters and rules, instant search across every domain with Command-K, a spam filter that learns, two-factor sign-in, import and export of mail, and IMAP and SMTP access so Apple Mail, Outlook and Thunderbird work. There is an API with webhooks for sending and receiving from code, a section on agents, and a native iPhone app is listed as coming soon. Pricing starts at $3 per mailbox with a 14-day free trial and no card; Pro covers three domains and Business has unlimited domains.

Key features

All domains in one inbox
Replies sent from the address the mail came to
Unlimited free aliases
Shared mailboxes without shared passwords
IMAP and SMTP for Apple Mail and Outlook
API and webhooks

Good fit for

Running email for several brands from one login
Giving a team a shared support address
Moving business mail off a patchwork of providers

Tags: business-email; multi-domain; aliases; shared-mailbox; imap; email-hosting; api; saas

SuperMailOS: questions and answers

What is SuperMailOS used for?: SuperMailOS is a business email service that puts every domain you own in one inbox, with free unlimited aliases, shared mailboxes and replies from the right address. It is a good fit for running email for several brands from one login, giving a team a shared support address and moving business mail off a patchwork of providers.
How much does SuperMailOS cost?: Paid plans for SuperMailOS start at $4 per seat per month, and there is no free plan. A free trial is available.
Is SuperMailOS open source?: No. SuperMailOS is proprietary (closed-source) software and can't be self-hosted. In the Email Clients & Servers category, open-source options include Mailspring, Roundcube and FairEmail.
What are some alternatives to SuperMailOS?: SuperMailOS competes with ImprovMX, Fastmail and Zoho Mail.