Nextmail against
AgentMail
line by line.
Their list price is $20 / month for 10 inboxes ($16 billed yearly), checked in September and October 2026. Ours counts domains and sends, never people, so set the dials below to your own team and volume.
What they are better at
One API call creates an inbox for an agent, and webhooks or websockets wake it when mail arrives. It is the most direct way to hand a fleet of agents an address each, and three inboxes are free.
Why people move
Every address has to exist as an inbox, and each one past the plan is $2 a month, with $5 for each extra teammate. Nextmail can take mail at any address on your domain without creating it first, and charges once for the workspace however many agents read it.
most mailboxes bill per seat; two or more needs Starter
ours steps at 1, 50 and 500; many others charge more as you add them
Sending APIs and Mailchimp bill by volume; mailboxes cap it per seat
unlimited on every plan of ours; some tie them to seats, some bill each inbox
Google WorkspaceMost of these sell one piece of the job: a mailbox, a sending API, inboxes for agents, a campaign tool or an app that needs a mailbox from somebody else. The Nextmail 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.
Every mailbox on one table, AgentMail among them. Where a vendor does not document something, it says so rather than pretending the answer is no.
| Compared | Nextmail Starter | Fastmail Business Standard | Proton Mail Mail Essentials | Google Workspace Business Starter | HEY for Domains per person | Superhuman Starter + Workspace | AgentMail Developer | OpenEmail Free | Nylas Essentials |
|---|---|---|---|---|---|---|---|---|---|
| What you actually pay for | One plan per workspace | Each person | Each person | Each person | Each person | Each person, twice | Inboxes and seats | Messages and storage | Accounts and emails |
| Five people, every month | $20 | $30 | $39.95 | $42 | $58 | $192 | $35 | $0 | $15 |
| Twentieth person costs | $0 | $6 | $7.99 | $8.40 | $12 | $38.40 | $5 | $0 | $0 |
| Hosts the mail itself | a client on top of Gmail or Outlook | with Agent Accounts | |||||||
| 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 | not documented | a catch-all route | not documented | |
| Free on your own domain | one domain, up to 1,000 addresses | trial only | custom domains are paid | trial only | no trial on domains | trial only | custom domains are paid | 3 domains, 1,000 sends a month | custom domains are paid |
| Drafts, subjects and answers from AI | writing assistant only | Gemini | Business tier | drafts through the API | |||||
| Your own agent can work the inbox | MCP server | JMAP API | API, no MCP | API and MCP | API and MCP | API and MCP | |||
| End-to-end encryption | between Nextmail mailboxes | their whole point | enterprise tiers |