EmptyInbox alternatives
24 email MCP servers from other publishers do the same job as EmptyInbox. The closest match comes first, then the best rated, with at most two per publisher.
Verify email addresses in real time: deliverability, disposable and role addresses, typo fixes.
No reviews yetgateway-ready668/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-ready7.0kFreeProgrammable 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/wkFreeReal 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/wkFreeAuthenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.
No reviews yetgateway-ready191FreeUnlimited agent mailboxes — create identities, read/wait for mail, extract OTPs, send email.
No reviews yetlocal · npm48285/wkFreeModern email for your business. Inboxes, calendars, newsletters and an API for your agents.
No reviews yetgateway-ready1647/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/wkFreePhone, SMS and email for AI agents. One remote MCP endpoint, OAuth login, zero install.
No reviews yetgateway-ready30FreeEmail 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/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/wkFreeGive AI agents full read/write email access via Mozilla Thunderbird. Zero credentials.
No reviews yetlocal · npm50FreeLocal MCP tools for server-readable agent inboxes and sending to owner-approved recipients.
No reviews yetlocal · npm271/wkFreeEmail inboxes for AI agents: addresses, threads, sending and replies.
No reviews yetgateway-ready15/wkFreeEmail verification for AI agents: verify single or bulk emails, check credits and history.
No reviews yetgateway-ready17/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/wkFree
EmptyInbox alternatives by what you need
Open source EmptyInbox alternatives (21)
Published under an open licence such as MIT or Apache-2.0.
MailProbe, Atomic Mail, e2a — email for AI agents, Agenticmail, e2a — email for AI agents, Openagentemail, Shipmail, Agent Email and 13 more below.
Hosted EmptyInbox alternatives (15)
Nothing to install: a remote endpoint you add by URL. Also callable through the mcp.market gateway.
MailProbe, Inbox Zero, Agent-Native Mail, Atomic Mail, e2a — email for AI agents, smbCloud Mail & Auth, e2a — email for AI agents, Shipmail and 7 more below.
Local EmptyInbox alternatives (9)
A package you install and run on your own machine, so your data stays on your computer.
Agenticmail, Openagentemail, Agent Email, SendGrid MCP Server, Proton Mail (unofficial), smails, Thunderbird CLI, Voidmail Agent Email and 1 more below.
Safest EmptyInbox alternatives (18)
Graded A: passed every check the scanner runs on the latest release.
MailProbe, Inbox Zero, Agent-Native Mail, Atomic Mail, e2a — email for AI agents, smbCloud Mail & Auth, e2a — email for AI agents, Shipmail and 10 more below.
EmptyInbox and its alternatives compared
| Server | Grade | Rating | Licence | Runs | Stars |
|---|---|---|---|---|---|
| EmptyInbox(this one) | B78 | No reviews yet | MIT | Local | 4 |
| MailProbe | A88 | No reviews yet | MIT | Hosted | 0 |
| Inbox Zero | A97 | No reviews yet | NOASSERTION | Hosted | 12k |
| 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 |
| Agenticmail | B82 | No reviews yet | MIT | Local | 229 |
| smbCloud Mail & Auth | A92 | No reviews yet | NOASSERTION | Hosted | 12 |
| e2a — email for AI agents | A93 | No reviews yet | Apache-2.0 | Hosted | 191 |
| Openagentemail | B74 | No reviews yet | Apache-2.0 | Local | 48 |
| Shipmail | A96 | No reviews yet | MIT | Hosted | 1 |
| Agent Email | A94 | No reviews yet | Apache-2.0 | Local | 6 |
| SendGrid MCP Server | B83 | No reviews yet | ISC | Local | 4 |
| Hail | B82 | No reviews yet | AGPL-3.0 | Hosted | 30 |
| send0 | A89 | No reviews yet | AGPL-3.0 | Hosted | 0 |
| Proton Mail (unofficial) | B83 | No reviews yet | MIT | Local | 6 |
| 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 |
| Thunderbird CLI | A92 | No reviews yet | MIT | Local | 50 |
| Voidmail Agent Email | A91 | No reviews yet | MIT | Local | 0 |
| Pidgeon | A91 | No reviews yet | MIT | Hosted | 0 |
| BillionVerify | A87 | No reviews yet | MIT | Hosted | 0 |
| Mailoo - Email MCP Server | A85 | 5.0 (1) | LGPL-3.0 | Local | 0 |
| emailmd | A93 | No reviews yet | MIT | Hosted | 1.4k |