# Botmail vs Robotomail: whose free plan can email the world?

Robotomail and Botmail work in a similar way. In both, an agent can sign
itself up through the API, picks its own name, and a human confirms by email
before the address works. Both have a skill file for agents and a hosted MCP
server with OAuth. The biggest difference is the free plan: Robotomail's free
mailbox can only email, and receive from, its owner. Botmail's free mailbox
can email anyone.

## Free plans compared

**Robotomail Free:** one mailbox at `slug@robotomail.co`, 10 sends and 10
receives a month, only between the agent and the owner's verified email.
Robotomail says other inbound mail is discarded, not saved. To email anyone
else, you upgrade to Starter at $19 a month.

**Botmail Free:** one mailbox at `name@botmail.pro` that can email anyone.
New accounts start at 100 sends a day, 25 of them to new recipients, rising
with trust up to 1,000 a day. Mail from anyone is received and kept. Free mail
ends with a short "Sent via Botmail" line.

## Side by side

| | Botmail | Robotomail |
| --- | --- | --- |
| Agent self-signup | `POST /v1/claim` with a proof-of-work, or `npx botmail claim` | `POST /v1/signup` with an email, password and slug |
| Human step | Approve by email, signing in with GitHub, Google or Apple | Verify the signup email |
| Free plan | 1 mailbox, email anyone; 100 sends a day at first, up to 1,000 with trust | 1 mailbox, 10 sends and 10 receives a month, owner only |
| Cheapest paid plan | $5/month: 3 mailboxes, 1 GB | $19/month: 10 mailboxes, 500 sends a day each, 2,000 inbound a month, 1 custom domain |
| Custom domains | Not yet | From $19/month |
| MCP | Hosted, OAuth or API key | Hosted, OAuth only; plain text, no attachments or reply-all |
| SDKs | None; plain HTTP and a CLI | TypeScript, Python, Go, Ruby and Rust, installed from GitHub tags |

Robotomail figures are from its [pricing page](https://robotomail.com/pricing)
and [agent skill](https://robotomail.com/skill.md), checked in October 2026.

## When Robotomail is the better choice

- you'll pay for a plan anyway and want 10 mailboxes and a custom domain for
  $19
- you want official SDKs in several languages
- the agent only needs to email you on the free plan

## When Botmail is the better choice

- the agent needs to email or hear from other people without paying
- you want a cheaper first paid plan ($5) for a few agents
- you want MCP tools beyond the basics: reply-all, forwarding, reading
  attachments, waiting for new mail, and drafts with a review link

Botmail isn't affiliated with Robotomail.

## Try Botmail

```sh
npx botmail claim ada --human you@example.com
```

Or paste the [skill.md](https://botmail.pro/skill.md) prompt into your agent. See also
[Botmail vs AgentMail](https://botmail.pro/compare/agentmail).

## Questions

### Is Robotomail free?

Robotomail has a free plan with one mailbox and 10 sends and 10 receives a month, only between the agent and its owner's verified email. Emailing anyone else needs a paid plan, from $19 a month.

### What is the difference between Botmail and Robotomail?

Both let an agent sign itself up and have a human confirm by email. Botmail's free plan can email anyone and its paid plans start at $5. Robotomail starts at $19 and includes a custom domain and SDKs.

---

Source: https://botmail.pro/compare/robotomail
Agent instructions: https://botmail.pro/skill.md
All guides: https://botmail.pro/llms.txt