KeyKeeper alternatives

Tools that do what KeyKeeper 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 KeyKeeper.

Read 2026-11-04 · KeyKeeper itself: From $1/mo

With a free plan or free to use: Dead Simple Email, Ollastack, SentFromAI, AgentMail, Lockally, Temp Mail.

10 alternativesUnlike KeyKeeper

#1
PO6 Productivity MCP · sign-in
Forwards mail from short po6.com aliases to your inbox and lets MCP-compatible AI agents read, compose and organize it.
More widely used
54
From $1/mo
#2
Mailyond Productivity MCP · sign-in
Reads and replies to email across all connected domains in one inbox, and sends transactional mail through one API.
Costs moreMore widely used
5
Active
From $10/mo
2026
#3
Dead Simple Email Productivity MCP · sign-in
Provides real email inboxes for AI agents with prompt injection scanning and webhook delivery.
Costs moreAlso: Security
16
Active
From $5/mo
2026
#4
Ollastack Productivity
Provides form endpoints, email mailboxes, and OTP reading for AI agents with automatic geo-stamping and spam filtering.
Costs moreMore widely used
31 linking domains
Active
From $9/mo
#5
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.
Costs moreMore widely used
2
From $19/mo
#6
AgentMail Productivity MCP · sign-in
Provides programmatic email inboxes that agents create, send from, and receive threaded replies in through an API.
Costs moreMore widely used
4.3k
Active
From $20/mo
2024
#7
Supercut Productivity MCP · sign-in
Records screen and camera video, auto-edits for clarity, and routes recordings to agents or workflows via API.
Also: VideoMore widely used
371k
Active
From $15/user/mo
2024
#8
Lockally Productivity MCP · sign-in
Hosts custom-domain mailboxes for teams and sends transactional email through a REST API.
More widely used
Little sign of use
Active
Free plan
#9
Fat Heron Mail Productivity MCP · sign-in
Sells custom email addresses on themed domains, either forwarding to your inbox or as full send-and-receive mailboxes.
More widely used
Little sign of use
#10
Temp Mail Productivity MCP · sign-in
Generates throwaway inbox addresses that receive incoming mail for a short lifetime, then delete it automatically.
More widely used
367k
Maintained

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How this list is made: the words KeyKeeper 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.