MailFlat alternatives
24 email MCP servers from other publishers do the same job as MailFlat. The closest match comes first, then the best rated, with at most two per publisher.
Real email and SMS for AI agents — send mail, receive verification codes, drive a real inbox.
No reviews yetlocal · npm229182/wkFreeUnlimited agent mailboxes — create identities, read/wait for mail, extract OTPs, send email.
No reviews yetlocal · npm48285/wkFreeLocal email connectivity for AI agents — read, draft, send, and organize Outlook mail via MCP
No reviews yetlocal · npm6335/wkFreeEmail inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.
No reviews yetgateway-ready409/wkFreeUnofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP
No reviews yetlocal · npm6113/wkFreeEmail for AI agents: inboxes, send/reply/forward, search, threads, webhooks — 21 SentFromAI tools.
No reviews yetgateway-ready284/wkFreeDisposable email inboxes for AI agents: create an address, wait for the verification email.
No reviews yetgateway-ready3659/wkFreeGive an AI agent its own email address: send, reply, read, and wait for mail.
No reviews yetgateway-ready47/wkFreeZero-config disposable email inboxes for AI agents: create, read mail, await verify codes.
No reviews yetlocal · npm447/wkFreeAgent-Native Superhuman - email client with keyboard shortcuts and AI triage
No reviews yetgateway-ready7.0kFreeProgrammable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.
No reviews yetgateway-ready267585/wkFreeAuthenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.
No reviews yetgateway-ready19130/wkFreeIMAP/SMTP MCP server to search, read, organize, send, reply & forward email for AI assistants
No reviews yetlocal · npm120970/wkFreeEmail infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.
No reviews yetgateway-ready12582/wkFreeAuthenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.
No reviews yetgateway-ready191FreeRead, search, draft, send, and organize email through Gmail, Outlook, and IMAP/SMTP mailboxes.
No reviews yetlocal · npm7635/wkFreeNever-stored live email: read, send and triage Gmail, Outlook / Microsoft 365, or any IMAP mailbox.
No reviews yetgateway-ready1027/wkFreeModern email for your business. Inboxes, calendars, newsletters and an API for your agents.
No reviews yetgateway-ready1647/wkFreeEmail infrastructure for AI agents: send, read replies as threads, campaigns, per-key limits.
No reviews yetgateway-ready1600/wkFreeAllow AI systems to read, send, archive, and manage emails via Gmail.
No reviews yetlocal · npm11210/wkFreeSend transactional email, run campaigns, manage contacts and automations, audit deliverability.
No reviews yetgateway-ready1219/wkFreeMCP server for SendGrid's v3 API: email marketing, transactional mail, templates, and analytics.
No reviews yetlocal · npm4249/wkFreeMicrosoft 365 Outlook mail via Graph: read, search, send, reply, forward, draft, move, delete.
No reviews yetlocal · npm1482/wkFreeSend email, look up public IP information, and convert files to Markdown through SendSoon.
No reviews yetlocal · mixed681/wkFree
MailFlat alternatives by what you need
Open source MailFlat alternatives (20)
Published under an open licence such as MIT or Apache-2.0.
Agenticmail, Openagentemail, Agent Email, send0, Proton Mail (unofficial), Sentfrom, smails, Postfleet and 12 more below.
Hosted MailFlat alternatives (13)
Nothing to install: a remote endpoint you add by URL. Also callable through the mcp.market gateway.
send0, Sentfrom, smails, Postfleet, Agent-Native Mail, Atomic Mail, e2a — email for AI agents, smbCloud Mail & Auth and 5 more below.
Local MailFlat alternatives (11)
A package you install and run on your own machine, so your data stays on your computer.
Agenticmail, Openagentemail, Agent Email, Proton Mail (unofficial), EmptyInbox, Imap, Fluxmail, Gmail and 3 more below.
Safest MailFlat alternatives (14)
Graded A: passed every check the scanner runs on the latest release.
Agent Email, send0, Sentfrom, Postfleet, Agent-Native Mail, Atomic Mail, e2a — email for AI agents, Imap and 6 more below.
MailFlat and its alternatives compared
| Server | Grade | Rating | Licence | Runs | Stars |
|---|---|---|---|---|---|
| MailFlat(this one) | B80 | No reviews yet | MIT | Local | 0 |
| Agenticmail | B82 | No reviews yet | MIT | Local | 229 |
| Openagentemail | B74 | No reviews yet | Apache-2.0 | Local | 48 |
| Agent Email | A94 | No reviews yet | Apache-2.0 | Local | 6 |
| send0 | A89 | No reviews yet | AGPL-3.0 | Hosted | 0 |
| Proton Mail (unofficial) | B83 | No reviews yet | MIT | Local | 6 |
| Sentfrom | A98 | No reviews yet | MIT | Hosted | 0 |
| smails | B83 | No reviews yet | MIT | Hosted | 36 |
| Postfleet | A98 | No reviews yet | MIT | Hosted | 0 |
| EmptyInbox | B78 | No reviews yet | MIT | Local | 4 |
| Agent-Native Mail | A98 | No reviews yet | Not stated | Hosted | 7.0k |
| Atomic Mail | A93 | No reviews yet | MIT | Hosted | 267 |
| e2a — email for AI agents | A96 | No reviews yet | Apache-2.0 | Hosted | 191 |
| Imap | A92 | No reviews yet | MIT | Local | 120 |
| smbCloud Mail & Auth | A92 | No reviews yet | NOASSERTION | Hosted | 12 |
| e2a — email for AI agents | A93 | No reviews yet | Apache-2.0 | Hosted | 191 |
| Fluxmail | B82 | No reviews yet | NOASSERTION | Local | 7 |
| MCPEmails | A98 | No reviews yet | AGPL-3.0 | Hosted | 10 |
| Shipmail | A96 | No reviews yet | MIT | Hosted | 1 |
| Sendraven | B84 | No reviews yet | MIT | Hosted | 1 |
| Gmail | B83 | No reviews yet | MIT | Local | 11 |
| MisarMail MCP Server | A90 | No reviews yet | MIT | Hosted | 1 |
| SendGrid MCP Server | B83 | No reviews yet | ISC | Local | 4 |
| Microsoft 365 Mail | A94 | No reviews yet | NOASSERTION | Local | 14 |
| Sendsoon | B83 | No reviews yet | MIT | Local | 6 |