# Looking for an AgentMail alternative? Meet Robotomail.

Give agents their own email identities with Robotomail. Create mailboxes, receive messages and send threaded replies through an API your application controls.

Evaluate a real conversation first: provision, receive, reply and recover from a failure.

[Create a mailbox](/sign-up) · [See plans](/pricing)

## Start with the workflow you need to ship

Robotomail is built for software that needs its own mailbox. Your agent gets an address it can send from, a place to receive replies and an API for messages, threads, files and events.

Start with one practical job: a customer support conversation, a lead follow-up or a request for information. Use the [email API](/email-api-for-ai-agents) to connect that job to your application, or choose an [agent integration](/build).

The buying question is whether the mailbox interface, operating model and plan fit that workflow. The detailed comparison below covers setup, integration, operating controls and migration.

## What you can build with Robotomail

- Create distinct mailboxes for agents or application roles.
- Send and receive email with API-key authentication.
- Load the relevant thread before generating a response.
- Handle inbound messages through webhooks, SSE or polling.
- Upload outgoing attachments and retrieve incoming files when needed.
- Use a verified custom domain and mailbox-scoped keys.

Your application supplies the model, workflow state and permission checks. Verify the account before sending, publish the DNS records for your own domain and test actual replies before expanding access.

[Create your first mailbox](/sign-up), then follow the [receive-and-reply guide](/docs/guides/receive-and-reply).

## Expand the feature comparison

Both Robotomail and AgentMail describe an agent-mailbox product. Treat overlap honestly: mailbox creation, two-way conversations, threading, attachments and event integrations are not unique to Robotomail.

| Evaluation area | Robotomail | AgentMail | Existing Gmail or Outlook account |
| --- | --- | --- | --- |
| Email identity | New mailboxes managed through the Robotomail API | Dedicated agent inboxes through its API | Access to an existing provider account; provisioning is a separate account/admin concern |
| Sending and receiving | Messages API, inbound webhooks, SSE and polling | Sending, receiving and realtime event interfaces | Provider-specific APIs and notification mechanisms |
| Conversation context | Message and thread APIs; RFC reply headers | Threads and reply support | Provider thread/conversation model plus required email headers |
| Files | Attachment upload and retrieval flows | Attachment support | Provider-specific MIME and attachment handling |
| Integration | REST, SDKs, MCP, CLI and agent skill | SDKs, MCP and agent integrations | OAuth permissions, tokens and provider SDKs |
| Domain setup | Publish the returned DNS records and verify the domain | Custom domains are documented | Domain administration depends on the account product |
| Agent controls | Your application enforces action policy; scope API keys to mailboxes | Review its current isolation and security controls against your requirements | Application permissions and organizational policies apply |

Reviewed 18 September 2026 against the products' public materials. AgentMail's current homepage describes agent self-signup and security tooling. Compare the specific controls and authorization requirements your workflow needs. This table does not claim identical semantics, limits or guarantees across services.

## Expand setup, reliability and security considerations

### Setup and credentials
Compare the full path from account creation to a verified send. Robotomail supports API-based onboarding and mailbox provisioning, but sending still requires verification and is subject to account controls. Do not confuse creating a mailbox with unrestricted permission to send.

For an agent fleet, inspect key scope, provisioning limits and how your application maps a mailbox to a tenant or role. A separate address is not by itself proof of complete security or reputation isolation.

### Inbound processing
Check the actual payload, retry policy and reconnect behavior for your runtime. In Robotomail, verify webhook signatures over raw bytes and make processing idempotent. An event should lead to a bounded task with a stored outcome. Recover by fetching messages rather than assuming every transient connection retains unlimited history.

### Delivery and reputation
No vendor can guarantee that every message lands in the inbox. Test authentication, bounce handling and recipient experience using a domain and traffic pattern representative of your application. Maintain suppressions and stop unwanted sending. A delivered event confirms server acceptance, not a human read.

### Security requirements
List the controls your buyer requires: access boundaries, retention, auditability, location of processing, contracts and any independently assessed certifications. Confirm those with current documentation or the vendor before purchase. Do not infer a certification or contractual guarantee from the availability of an API key or encryption in transit.

Robotomail's [security guidance](/docs/guides/agent-email-security), [privacy policy](/privacy) and [contact page](/contact) provide the starting point for evaluating its current controls.

## Expand costs, migration and existing-inbox tradeoffs

### Model the workload
Count active mailboxes, monthly sends, inbound messages, daily peaks, storage and custom domains. Include the cost of operating workers, retry handling and monitoring in your application. Use [Robotomail's current plans](/pricing) for its allowance and price details. Check current terms for any service being evaluated; a static comparison should not promise a price or quota indefinitely.

### Migrate one conversation first
Create a Robotomail mailbox, connect the agent and test sending, receiving, threading and attachments. Map credentials and message identifiers explicitly. Your application may need to preserve its own conversation state if historical messages stay at the old service.

For a custom domain, prepare the DNS change and monitor delivery through the cutover. Changing MX records changes inbound routing; it does not migrate old mail. Keep a rollback plan and avoid sending duplicate messages during parallel testing.

### Dedicated address versus an existing account
A Robotomail mailbox supplies a new email identity for the agent. If the requirement is to operate within an existing employee inbox, that is a different access model with user consent, organizational permissions and historical data to consider. The [agent email and personal email comparison](/agent-email-vs-personal-email) expands that distinction.

### Evaluate with evidence
Use the same representative message and reply workflow when comparing implementations. Inspect message fields, thread continuity, file handling, delivery events and failure recovery. Document what actually worked for your runtime and expected volume. A feature table is a checklist for that test, not a replacement for it.

## Common questions

### Is Robotomail an AgentMail alternative?

Yes. Both provide API-managed inboxes for agents. Evaluate Robotomail using the integration, mailbox workflow and usage limits that matter to your application.

### Do I need to move every mailbox at once?

No. Start with a test mailbox and one workflow. Check message identifiers, history requirements, credentials and domain routing before expanding the migration.

### How do I choose a Robotomail plan?

Use the current pricing page to choose a plan for your mailbox count, sends, incoming messages and storage. Test a representative workflow before expanding.

### What's included in the Free plan?

1 mailbox, 10 sends and 10 receives per month, only between your agent and your verified email address. No credit card, no expiry. Allowances reset on the first of each month (UTC). Upgrade to email other people or use a custom domain.

## Continue building

- [Email for AI agents](/email-for-ai-agents)

- [Current Robotomail plans](/pricing)

- [Detailed AgentMail comparison](/compare/agentmail)