Agentboxd alternatives

Tools that do what Agentboxd 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 Agentboxd.

Read 2026-10-26 · Agentboxd itself: Free plan · From $15/mo

With a free plan or free to use: OpenMail, AI Email API & Infrastructure for AI Agents, Revdoku, Robotomail, Temp Mail, Lettera.

10 alternativesUnlike Agentboxd

#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.
Costs moreMore widely used
105
Active
From $20/mo
#3
Revdoku Agents MCP · sign-in
Receives email and attachments for an AI agent's own address, stores files, and sends replies to senders who wrote in.
Cheaper
11
Active
From $4.99/mo
#4
Robotomail Agents
Provides real email addresses and mailboxes for AI agents to send and receive messages via API.
Costs moreAlso: Agents
464
Active
From $19/mo
#5
ReplyLayer Security MCP · sign-in
Screens email for AI agents, blocking risky messages and requiring human approval before sending sensitive replies.
More widely used
702 installs/mo
Active
From $13.30/mo
#6
Speakeasy Agents MCP · sign-in
Routes agent traffic through one identity-checked MCP gateway, enforcing security policy on every prompt and tool call.
Also: Agents
5.8k
Active
From $0.35 per use
2021
#7
Lindy Agents
Executes tasks across connected tools like email, Slack, and CRM by learning your workflows and operating on a schedule.
Also: Agents, Workflow automationMore widely used
153k
Active
From $49.99/user/mo
#8
Temp Mail Security
Generates disposable email addresses to receive verification codes and sign-ups without exposing your primary inbox.
CheaperMore widely used
45.3k
Active
From $3.99/mo
#9
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
#10
Gumloop Agents
Builds and deploys autonomous agents that automate business tasks like sales pipeline management, prospect research, and CRM updates.
Costs moreAlso: Agents, Workflow automation
372k
Active
From $37/mo

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How this list is made: the words Agentboxd 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.