OpenEmail against
Mailgun
line by line.
Their list price is $15 / month for 10,000 sends, checked in September 2026. Ours counts domains and sends, never people, so set the dials below to your own team and volume.
What they are better at
Built for developers who want control: routes that act on inbound mail, a validation API, and sending across many domains.
Why people move
Inbound mail goes to routes and webhooks, not to a mailbox you can read, and the cheapest plan sends from one domain. OpenEmail gives every plan a mailbox and charges once for the workspace, and your Mailgun code keeps working against it.
most mailboxes bill per seat; two or more needs Starter
ours steps at 1, 50 and 500; Proton, HEY, Resend, Fastmail, Postmark and Mailgun charge more
Sending APIs and Mailchimp bill by volume; mailboxes cap it per seat
unlimited on every plan of ours; Proton and Fastmail tie them to seats
Forward EmailTeam
OpenEmailStarter
FastmailBusiness Standard
Google WorkspaceBusiness Starter
SuperhumanStarter + WorkspaceMost of these sell one piece of the job: a mailbox, a sending API, a campaign tool or an app that needs a mailbox from somebody else. The OpenEmail price is the whole job, with mailboxes on your own domains, sending and receiving, the full API and the AI assistant on every plan. So this is not even a fair comparison: every other bar buys one piece, and ours buys all of it.
Line by line.
Mailgun is not a mailbox, so it is not on this table. The table compares the places mail actually lands, which is the choice Mailgun sits beside rather than replaces.
| Compared | OpenEmail Starter | Fastmail Business Standard | Proton Mail Mail Essentials | Google Workspace Business Starter | HEY for Domains per person | Superhuman Starter + Workspace |
|---|---|---|---|---|---|---|
| What you actually pay for | One plan per workspace | Each person | Each person | Each person | Each person | Each person, twice |
| Five people, every month | $20 | $30 | $39.95 | $42 | $58 | $192 |
| Twentieth person costs | $0 | $6 | $7.99 | $8.40 | $12 | $38.40 |
| Hosts the mail itself | a client on top of Gmail or Outlook | |||||
| Catch-all on your own domain | yours to switch on | paid plans | via a routing rule | aliases; catch-all not documented | whatever the host does | |
| Free on your own domain | one domain, unlimited addresses | trial only | custom domains are paid | trial only | no trial on domains | trial only |
| Drafts, subjects and answers from AI | writing assistant only | Gemini | Business tier | |||
| Your own agent can work the inbox | MCP server | JMAP API | API, no MCP | |||
| End-to-end encryption | between OpenEmail mailboxes | their whole point | enterprise tiers |