Atomic Mail alternatives
24 email MCP servers from other publishers do the same job as Atomic Mail. 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/wkFreeEmail infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.
No reviews yetgateway-ready12582/wkFreeSearch Gmail and Outlook, save drafts, manage email rules, and view email stats.
No reviews yetgateway-ready12kFreeAgent-Native Superhuman - email client with keyboard shortcuts and AI triage
No reviews yetgateway-ready7.0kFreeAI email inbox and sending tools with attachments, search, live events, and webhooks.
No reviews yetgateway-ready65285/wkFreeIMAP/SMTP email MCP server — 52 tools, stdio + HTTP, IMAP IDLE push, multi-account, AI triage.
No reviews yetlocal · npm1171.2k/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/wkFreeMCP server for SendGrid's v3 API: email marketing, transactional mail, templates, and analytics.
No reviews yetlocal · npm4249/wkFreeUnofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP
No reviews yetlocal · npm6113/wkFreeMulti-account email MCP server for Gmail, IMAP, and JMAP: search, send, drafts, labels.
No reviews yetlocal · npm793/wkFreeReceive-only temporary email addresses for AI agents: create an inbox, wait for an email, read it.
No reviews yetgateway-ready1454/wkFreeEmail OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.
No reviews yetgateway-ready91/wkFreeFree disposable email for AI agents: a throwaway inbox to read verification codes over MCP.
No reviews yetlocal · npm3659/wkFreeGive an AI agent its own email address: send, reply, read, and wait for mail.
No reviews yetgateway-ready47/wkFreeTeaches AI to write HTML email that renders in Outlook, Gmail, and Apple Mail. 21 rules, 6 comps.
No reviews yetgateway-ready45/wkFreeZero-config disposable email inboxes for AI agents: create, read mail, await verify codes.
No reviews yetlocal · npm447/wkFreeA real email inbox for AI agents: human-approved sends, untrusted-by-default inbound.
No reviews yetlocal · npm175/wkFreeGoverned email for AI agents: a sandbox inbox to read and send from, human approval to go external.
No reviews yetgateway-ready135/wkFreeEmail MCP server for AI agents: IMAP/SMTP, Gmail, Outlook, calendar, ManageSieve, AI triage, OAuth2.
5.0(1)local · npm1.3k/wkFreeRender markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.
No reviews yetgateway-ready1.4k4.6k/wkFreeAI-powered OSINT agent & MCP server. 21 tools: email, breach, IP, WHOIS, DNS, Shodan, GitHub & more.
No reviews yetlocal · pypi1.8k886/wkFreeMac & Windows: let ChatGPT, Claude & Cursor use your email, calendar, iMessage, Teams, files.
No reviews yetgateway-ready712.0k/wkFreeAuthenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.
No reviews yetgateway-ready19130/wkFree
Atomic Mail alternatives by what you need
Open source Atomic Mail alternatives (20)
Published under an open licence such as MIT or Apache-2.0.
Agenticmail, Email Inbox API + Sending by Sendmux, Email, Openagentemail, Agent Email, SendGrid MCP Server, Proton Mail (unofficial), Mailbox and 12 more below.
Hosted Atomic Mail alternatives (12)
Nothing to install: a remote endpoint you add by URL. Also callable through the mcp.market gateway.
smbCloud Mail & Auth, Inbox Zero, Agent-Native Mail, Email Inbox API + Sending by Sendmux, Tmailor temporary email, Radmail, Postfleet, HTML Email Playbook and 4 more below.
Local Atomic Mail alternatives (12)
A package you install and run on your own machine, so your data stays on your computer.
Agenticmail, Email, Openagentemail, Agent Email, SendGrid MCP Server, Proton Mail (unofficial), Mailbox, smails and 4 more below.
Safest Atomic Mail alternatives (13)
Graded A: passed every check the scanner runs on the latest release.
smbCloud Mail & Auth, Inbox Zero, Agent-Native Mail, Email Inbox API + Sending by Sendmux, Agent Email, Radmail, Postfleet, HTML Email Playbook and 5 more below.
Atomic Mail and its alternatives compared
| Server | Grade | Rating | Licence | Runs | Stars |
|---|---|---|---|---|---|
| Atomic Mail(this one) | A93 | No reviews yet | MIT | Hosted | 267 |
| Agenticmail | B82 | No reviews yet | MIT | Local | 229 |
| smbCloud Mail & Auth | A92 | No reviews yet | NOASSERTION | Hosted | 12 |
| Inbox Zero | A97 | No reviews yet | NOASSERTION | Hosted | 12k |
| Agent-Native Mail | A98 | No reviews yet | Not stated | Hosted | 7.0k |
| Email Inbox API + Sending by Sendmux | A96 | No reviews yet | MIT | Hosted | 65 |
| B74 | No reviews yet | LGPL-3.0 | Local | 117 | |
| Openagentemail | B74 | No reviews yet | Apache-2.0 | Local | 48 |
| Agent Email | A94 | No reviews yet | Apache-2.0 | Local | 6 |
| SendGrid MCP Server | B83 | No reviews yet | ISC | Local | 4 |
| Proton Mail (unofficial) | B83 | No reviews yet | MIT | Local | 6 |
| Mailbox | B83 | No reviews yet | MIT | Local | 7 |
| Tmailor temporary email | B80 | No reviews yet | MIT | Hosted | 1 |
| Radmail | A93 | No reviews yet | MIT | Hosted | 0 |
| smails | B83 | No reviews yet | MIT | Local | 36 |
| Postfleet | A98 | No reviews yet | MIT | Hosted | 0 |
| HTML Email Playbook | A93 | No reviews yet | MIT | Hosted | 0 |
| EmptyInbox | B78 | No reviews yet | MIT | Local | 4 |
| Agent Inbox | A91 | No reviews yet | MIT | Local | 0 |
| Mailbuttons | A88 | No reviews yet | MIT | Hosted | 1 |
| Mailoo - Email MCP Server | A85 | 5.0 (1) | LGPL-3.0 | Local | 0 |
| emailmd | A93 | No reviews yet | MIT | Hosted | 1.4k |
| OpenOSINT | C63 | No reviews yet | MIT | Local | 1.8k |
| LMCP | B72 | No reviews yet | NOASSERTION | Hosted | 71 |
| e2a — email for AI agents | A96 | No reviews yet | Apache-2.0 | Hosted | 191 |