Is Molted an AgentMail alternative?

Yes. Both give each agent its own address and inbox over an API and MCP. Molted turns its safety checks on for every mailbox by default and your agent can't switch them off, while AgentMail leaves more of that to you and covers more ground (IMAP, calendars, pods).

Does AgentMail screen for prompt injection?

Yes, with Agent Armor, which was in AgentMail Labs when we checked. It starts in Monitor mode, which labels mail and delivers it as usual. Its Hold mode holds back the notification, while the message stays readable through the API. Molted quarantines high-risk mail on every mailbox, and your agent never sees the original.

At 10 mailboxes they're close: Molted Solo is $19 a month and AgentMail Developer is $20, each with 10,000 sends. Above that, Molted Team is 50 mailboxes for $79, and AgentMail's next plan, Startup, is 150 inboxes for $200. Molted also counts inbound mail, which AgentMail's pricing page doesn't list a limit for.

Does Molted have a SOC 2 report?

Not yet. If you need one today, AgentMail has a SOC 2 Type II report.

Molted vs AgentMail

Both give your agent its own inbox. The difference is what happens when an email tries to take control of it.

Start free Read the docs

AgentMail is the broader platform. It has IMAP and SMTP, calendars, pods for multi-tenant apps and a SOC 2 Type II report.

Molted is narrower and stricter by default. Mail that tries to instruct your agent is quarantined on every mailbox, your agent never sees the original, and duplicate sends are blocked on the server without a key from you.

Pick AgentMail if you need SOC 2 or IMAP today. Pick Molted if you want your agent to run its own email without building the guardrails yourself.

AgentMail facts checked on Nov 5, 2026, each linked to AgentMail's own page.

Side by side.

Screening incoming mail

Molted

On for every mailbox from the start. A message scored high risk for trying to instruct your agent is quarantined before your agent reads it.

AgentMail

Agent Armor, in AgentMail Labs (free while it's there) and on US accounts. An owner or admin turns it on. It starts in Monitor, which labels mail and delivers it as usual.

Source

What the agent sees of a flagged email

Molted

A placeholder marked untrusted, with its risk level. The original stays out of your agent's context, and only a person can release it.

AgentMail

In Hold mode the message.received event is held back, but the message stays readable through the API, search and IMAP, so your agent has to skip the agent-armor-held label itself.

Source

Duplicate sends

Molted

Checked on the server for every send. The same email to the same person inside a cooldown is blocked, across every agent on the mailbox.

AgentMail

An Idempotency-Key header you pass on each send. A retry with the same key within 24 hours returns the first message and sends nothing new.

Source

Approving emails before they go out

Molted

A setting per mailbox. First emails to new contacts, or every email, wait for you to approve in the dashboard or the iPhone app.

AgentMail

Built from drafts and API key permissions. Your agent's key can't send, and the key behind your own approval tool sends the draft.

Source

Handing a conversation to a person

Molted

Your agent hands you the thread with a note, and it can't email that contact until you hand the thread back.

AgentMail

Labels such as needs-human-review, which your own dashboard or scheduled job looks for.

Source

Ways in

Molted

MCP (hosted at mcp.molted.email), a CLI, REST, webhooks and a live event stream. No IMAP or SMTP.

AgentMail

REST with SDKs, MCP, a CLI, webhooks, WebSockets, and IMAP and SMTP.

Source

Beyond email

Molted

Email only.

AgentMail

Calendars, pods for multi-tenant apps, and AgentID sign-in for agents.

Source

Compliance

Molted

No SOC 2 report yet. Operated from Sweden. API keys are hashed, and you can export or delete your data whenever you like.

AgentMail

SOC 2 Type II, first audited in 2025. Separate US and EU environments, with the EU region on the Enterprise plan.

Source

When an agent signs itself up

Molted

Your agent can create the account and set it up. Paying is a person's call: your agent sends you the checkout link.

AgentMail

It starts with 1 inbox and 10 emails a day, and it can only email its human until that person verifies the account.

Source

	Molted	AgentMail
Screening incoming mail	On for every mailbox from the start. A message scored high risk for trying to instruct your agent is quarantined before your agent reads it.	Agent Armor, in AgentMail Labs (free while it's there) and on US accounts. An owner or admin turns it on. It starts in Monitor, which labels mail and delivers it as usual. Source
What the agent sees of a flagged email	A placeholder marked untrusted, with its risk level. The original stays out of your agent's context, and only a person can release it.	In Hold mode the message.received event is held back, but the message stays readable through the API, search and IMAP, so your agent has to skip the agent-armor-held label itself. Source
Duplicate sends	Checked on the server for every send. The same email to the same person inside a cooldown is blocked, across every agent on the mailbox.	An Idempotency-Key header you pass on each send. A retry with the same key within 24 hours returns the first message and sends nothing new. Source
Approving emails before they go out	A setting per mailbox. First emails to new contacts, or every email, wait for you to approve in the dashboard or the iPhone app.	Built from drafts and API key permissions. Your agent's key can't send, and the key behind your own approval tool sends the draft. Source
Handing a conversation to a person	Your agent hands you the thread with a note, and it can't email that contact until you hand the thread back.	Labels such as needs-human-review, which your own dashboard or scheduled job looks for. Source
Ways in	MCP (hosted at mcp.molted.email), a CLI, REST, webhooks and a live event stream. No IMAP or SMTP.	REST with SDKs, MCP, a CLI, webhooks, WebSockets, and IMAP and SMTP. Source
Beyond email	Email only.	Calendars, pods for multi-tenant apps, and AgentID sign-in for agents. Source
Compliance	No SOC 2 report yet. Operated from Sweden. API keys are hashed, and you can export or delete your data whenever you like.	SOC 2 Type II, first audited in 2025. Separate US and EU environments, with the EU region on the Enterprise plan. Source
When an agent signs itself up	Your agent can create the account and set it up. Paying is a person's call: your agent sends you the checkout link.	It starts with 1 inbox and 10 emails a day, and it can only email its human until that person verifies the account. Source

What it costs.

At 10 mailboxes the two are a dollar apart. Molted also counts inbound mail, and quarantined spam never counts. AgentMail's pricing page lists no inbound limit.

Molted

Plan	Price	Mailboxes	Sends	Inbound	Domains
Free	$0	3	3,000 a month	1,000	0
Solo	$19/mo	10	10,000 a month	5,000	3
Team	$79/mo	50	50,000 a month	25,000	10

More than 50 mailboxes: contact us.

AgentMail

Plan	Price	Inboxes	Sends	Domains
Free	$0	3	3,000 a month, 100 a day	1
Developer	$20/mo	10	10,000 a month	10
Startup	$200/mo	150	15,000 a day	150
Enterprise	Custom	Unlimited	By contract	By contract

As listed on Nov 5, 2026. Source

Choose Molted if

Your agent reads mail from strangers and acts on it, so screening has to be on and has to bind.
You want duplicates, cooldowns and suppressions enforced without writing them yourself.
You only want to be pulled in for handoffs and approvals, on the web or your phone.
You're one builder or a small team, with up to 50 mailboxes.

Choose AgentMail if

You need a SOC 2 report or an EU region today.
Your agent needs IMAP or SMTP, or a calendar.
You're building a multi-tenant product and want pods.
You want more than 50 inboxes on a self-serve plan.

Moving over.

Your agent can do it. It signs up from the command line, gets a mailbox, and connects over MCP. Bring your own domain on Solo or Team when you're ready.

npx @molted/cli auth signup · mcp.molted.email · /skill.md

Questions.

Is Molted an AgentMail alternative?: Yes. Both give each agent its own address and inbox over an API and MCP. Molted turns its safety checks on for every mailbox by default and your agent can't switch them off, while AgentMail leaves more of that to you and covers more ground (IMAP, calendars, pods).
Does AgentMail screen for prompt injection?: Yes, with Agent Armor, which was in AgentMail Labs when we checked. It starts in Monitor mode, which labels mail and delivers it as usual. Its Hold mode holds back the notification, while the message stays readable through the API. Molted quarantines high-risk mail on every mailbox, and your agent never sees the original.
Which is cheaper?: At 10 mailboxes they're close: Molted Solo is $19 a month and AgentMail Developer is $20, each with 10,000 sends. Above that, Molted Team is 50 mailboxes for $79, and AgentMail's next plan, Startup, is 150 inboxes for $200. Molted also counts inbound mail, which AgentMail's pricing page doesn't list a limit for.
Does Molted have a SOC 2 report?: Not yet. If you need one today, AgentMail has a SOC 2 Type II report.

Hand it to your agent.

It sets up its own inbox. You decide how much it does on its own.

Start free