Proton Mail (unofficial) alternatives
24 email MCP servers from other publishers do the same job as Proton Mail (unofficial). The closest match comes first, then the best rated, with at most two per publisher.
Email MCP server for AI agents: IMAP/SMTP, Gmail, Outlook, calendar, ManageSieve, AI triage, OAuth2.
5.0(1)local · npm1.3k/wkFreeIMAP/SMTP email MCP server — 52 tools, stdio + HTTP, IMAP IDLE push, multi-account, AI triage.
No reviews yetlocal · npm1491.0k/wkFreeIMAP/SMTP MCP server to search, read, organize, send, reply & forward email for AI assistants
No reviews yetlocal · npm120970/wkFreeReal email and SMS for AI agents — send mail, receive verification codes, drive a real inbox.
No reviews yetlocal · npm251169/wkFreeUnlimited agent mailboxes — create identities, read/wait for mail, extract OTPs, send email.
No reviews yetlocal · npm48285/wkFreeRead, 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/wkFreeLocal email connectivity for AI agents — read, draft, send, and organize Outlook mail via MCP
No reviews yetlocal · npm6335/wkFreeMulti-account email MCP server for Gmail, IMAP, and JMAP: search, send, drafts, labels.
No reviews yetlocal · npm11159/wkFreeEmail and meetings for AI agents you can trust: checked mail, held sends, Meet calls you approve.
No reviews yetgateway-ready1286/wkFreeGive an AI agent its own email address: send, reply, read, and wait for mail.
No reviews yetgateway-ready47/wkFreeIMAP/SMTP email for iCloud, Gmail, Proton Bridge and more: search, read, follow threads, send.
No reviews yetlocal · mixed183/wkFreeMCP server for Aruba email and calendar via IMAP/SMTP/CalDAV
No reviews yetlocal · pypi467/wkFreeAgent-Native Superhuman - email client with keyboard shortcuts and AI triage
No reviews yetgateway-ready7.7kFreeProgrammable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.
No reviews yetgateway-ready267585/wkFreeEmail infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.
No reviews yetgateway-ready12582/wkFreeAllow AI systems to read, send, archive, and manage emails via Gmail.
No reviews yetlocal · npm12640/wkFreeUnified email MCP server for Gmail, Outlook, iCloud, and IMAP with batch operations
No reviews yetlocal · npm26305/wkFreeEmail infrastructure for AI agents: send, read replies as threads, campaigns, per-key limits.
No reviews yetgateway-ready1600/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/wkFreeEmail inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.
No reviews yetgateway-ready409/wkFreeGoverned email for AI agents: a sandbox inbox to read and send from, human approval to go external.
No reviews yetgateway-ready184/wkFree
Proton Mail (unofficial) alternatives by what you need
Open source Proton Mail (unofficial) alternatives (21)
Published under an open licence such as MIT or Apache-2.0.
Mailoo - Email MCP Server, Email, Imap, Agenticmail, Openagentemail, MCPEmails, Agent Email, Mailbox and 13 more below.
Hosted Proton Mail (unofficial) alternatives (10)
Nothing to install: a remote endpoint you add by URL. Also callable through the mcp.market gateway.
MCPEmails, Inbin: email and meetings for AI agents, Postfleet, Agent-Native Mail, Atomic Mail, smbCloud Mail & Auth, Sendraven, MisarMail MCP Server and 2 more below.
Local Proton Mail (unofficial) alternatives (14)
A package you install and run on your own machine, so your data stays on your computer.
Mailoo - Email MCP Server, Email, Imap, Agenticmail, Openagentemail, Fluxmail, Agent Email, Mailbox and 6 more below.
Safest Proton Mail (unofficial) alternatives (15)
Graded A: passed every check the scanner runs on the latest release.
Mailoo - Email MCP Server, Imap, MCPEmails, Agent Email, Inbin: email and meetings for AI agents, Postfleet, owlpost, Agent-Native Mail and 7 more below.
Proton Mail (unofficial) and its alternatives compared
| Server | Grade | Rating | Licence | Runs | Stars |
|---|---|---|---|---|---|
| Proton Mail (unofficial)(this one) | B83 | No reviews yet | MIT | Local | 11 |
| Mailoo - Email MCP Server | A85 | 5.0 (1) | LGPL-3.0 | Local | 0 |
| B74 | No reviews yet | LGPL-3.0 | Local | 149 | |
| Imap | A92 | No reviews yet | MIT | Local | 120 |
| Agenticmail | B82 | No reviews yet | MIT | Local | 251 |
| Openagentemail | B74 | No reviews yet | Apache-2.0 | Local | 48 |
| Fluxmail | B82 | No reviews yet | NOASSERTION | Local | 7 |
| MCPEmails | A98 | No reviews yet | AGPL-3.0 | Hosted | 10 |
| Agent Email | A94 | No reviews yet | Apache-2.0 | Local | 6 |
| Mailbox | B83 | No reviews yet | MIT | Local | 11 |
| Inbin: email and meetings for AI agents | A91 | No reviews yet | MIT | Hosted | 1 |
| Postfleet | A98 | No reviews yet | MIT | Hosted | 0 |
| owlpost | A92 | No reviews yet | MIT | Local | 1 |
| Aruba Email & Calendar | B83 | No reviews yet | MIT | Local | 4 |
| Agent-Native Mail | A98 | No reviews yet | MIT | Hosted | 7.7k |
| Atomic Mail | A93 | No reviews yet | MIT | Hosted | 267 |
| smbCloud Mail & Auth | A92 | No reviews yet | NOASSERTION | Hosted | 12 |
| Gmail | B83 | No reviews yet | MIT | Local | 12 |
| A85 | No reviews yet | MIT | Local | 26 | |
| Sendraven | B84 | No reviews yet | MIT | Hosted | 1 |
| 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 |
| send0 | A89 | No reviews yet | AGPL-3.0 | Hosted | 0 |
| Mailbuttons | A89 | No reviews yet | MIT | Hosted | 1 |