letterport alternatives

Tools that do what letterport does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from letterport.

Read 2026-10-28 · letterport itself: Free plan · From $19/mo

With a free plan or free to use: OpenMail, AI Email API & Infrastructure for AI Agents, Primitive, SentFromAI, AgentMail, Mail for Bots, OpenClaw, Robotomail, mcpemails, Lettera.

10 alternativesUnlike letterport

#1
OpenMail Agents MCP · sign-in
Gives each AI agent its own address and reads inbound mail over webhook or websocket, parsing attachments to plain text.
More widely used
321
Active
From ≈ $10/mo
2026
#2
AI Email API & Infrastructure for AI Agents Agents MCP · sign-in
Gives an agent its own email address, sending and receiving mail through an API, with replies scored for prompt injection.
More widely used
105
Active
From $20/mo
#3
Primitive Agents MCP · open
Provides email sending and receiving over HTTP for AI agents, with managed addresses running JavaScript handlers on inbound mail.
CheaperOwn MCP server
8
Active
From $13/mo
2026
#4
SentFromAI Productivity MCP · sign-in
Gives each AI agent its own addressable email inbox for sending, receiving and threading mail through an API, SDK or MCP server.
Also: Agents
2
From $19/mo
#5
AgentMail Productivity MCP · sign-in
Provides programmatic email inboxes that agents create, send from, and receive threaded replies in through an API.
More widely used
4.3k
Active
From $20/mo
2024
#6
Mail for Bots Agents MCP · sign-in
Gives AI assistants their own email addresses to sign up for services, receive verification codes and reply to messages.
Same job
Little sign of use
Active
From $20/mo
#7
OpenClaw Agents MCP · sign-in
Open source AI assistant that manages email, calendar, and tasks from chat apps without subscriptions.
Open sourceAlso: Agents, Chat assistant
182k
Active
Open source
#8
Robotomail Agents MCP · sign-in
Provides real email addresses and mailboxes for AI agents to send and receive messages via API.
Also: AgentsMore widely used
464
Active
From $19/mo
#9
mcpemails Agents MCP · sign-in
Gives AI agents live read, search and send access to Gmail, Outlook and IMAP mailboxes through an MCP endpoint.
CheaperAlso: Agents
14
Active
From $7.20/mo
#10
Lettera Agents MCP · open
Gives AI agents a persistent real email mailbox with threaded replies, plus signed agent-to-agent message relay.
Also: AgentsOwn MCP server
Little sign of use
Active
Free

← letterport: the full card All Agents tools →

How this list is made: the words letterport is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.