Simple pricing that
scales with your agents
Unlimited sending on Growth and Scale. Inbound scales from 100/month on Free to unlimited on Scale. No credit card to start.
Test and prototype
- 3 mailboxes
- 5,000 emails / month
- 100 sends / day per mailbox
- 100 inbound / month
- Platform email (@robotomail.co)
- 1 GB storage
- Webhooks + SSE streaming
- Full API & CLI access
Ship to production
- 10 mailboxes
- 15,000 emails / month
- 500 sends / day per mailbox
- 2,000 inbound / month
- 1 custom domain
- 10 GB storage
- Webhooks + SSE streaming
- Email support
Scale your agents
- 50 mailboxes
- Unlimited monthly sending
- 1,000 sends / day per mailbox
- 20,000 inbound / month
- 5 custom domains
- 25 GB storage
- Webhooks + SSE streaming
- Priority email support
Production at volume
- 200 mailboxes
- Unlimited monthly sending
- 2,000 sends / day per mailbox
- Unlimited inbound
- Unlimited custom domains
- 100 GB storage
- Dedicated IPs
- Slack + priority support
All prices in USD. Monthly inbound caps apply per account. Daily per-mailbox send limits protect deliverability.
Feature breakdown
| Free | Developer | Growth | Scale | |
|---|---|---|---|---|
| Mailboxes | 3 | 10 | 50 | 200 |
| Monthly sending | 5,000 | 15,000 | Unlimited | Unlimited |
| Daily per mailbox | 100 | 500 | 1,000 | 2,000 |
| Monthly inbound | 100 | 2,000 | 20,000 | Unlimited |
| Custom domains | — | 1 | 5 | Unlimited |
| Storage | 1 GB | 10 GB | 25 GB | 100 GB |
| Webhooks | ||||
| SSE streaming | ||||
| Dedicated IPs | — | — | — | |
| API & CLI access | ||||
| Support | Docs | Priority | Slack + priority |
- Mailboxes
- 3
- Monthly sending
- 5,000
- Daily per mailbox
- 100
- Monthly inbound
- 100
- Custom domains
- —
- Storage
- 1 GB
- Webhooks
- SSE streaming
- Dedicated IPs
- —
- API & CLI access
- Support
- Docs
- Mailboxes
- 10
- Monthly sending
- 15,000
- Daily per mailbox
- 500
- Monthly inbound
- 2,000
- Custom domains
- 1
- Storage
- 10 GB
- Webhooks
- SSE streaming
- Dedicated IPs
- —
- API & CLI access
- Support
- Mailboxes
- 50
- Monthly sending
- Unlimited
- Daily per mailbox
- 1,000
- Monthly inbound
- 20,000
- Custom domains
- 5
- Storage
- 25 GB
- Webhooks
- SSE streaming
- Dedicated IPs
- —
- API & CLI access
- Support
- Priority
- Mailboxes
- 200
- Monthly sending
- Unlimited
- Daily per mailbox
- 2,000
- Monthly inbound
- Unlimited
- Custom domains
- Unlimited
- Storage
- 100 GB
- Webhooks
- SSE streaming
- Dedicated IPs
- API & CLI access
- Support
- Slack + priority
Pricing questions
Is monthly sending really unlimited?
Yes, on all paid plans. No monthly caps, no overage charges. Per-mailbox daily limits protect your sender reputation and deliverability — not our billing.
What are the daily limits for?
Sending too many emails from one address in a single day hurts deliverability. Daily per-mailbox limits keep your agents in the safe zone. They reset every day at midnight UTC.
Can I change plans anytime?
Yes. Upgrades and downgrades both take effect immediately. Stripe automatically prorates your bill — you get credit for unused time on the old plan.
Do I need a credit card for the free tier?
No. Sign up, create a mailbox, start sending. No credit card required.
What's a platform email vs custom domain?
Platform email is a free-tier address on our shared domain (slug@robotomail.co). Custom domains let your agent send from your own domain (agent@yourdomain.com) with auto-configured DKIM, SPF, and DMARC.
How do monthly inbound limits work?
Each plan has a monthly inbound cap: 100 on Free, 2,000 on Developer, 20,000 on Growth, and unlimited on Scale. The cap resets on the 1st of every month UTC. Inbound is counted per account, not per mailbox.
What happens if I exceed my monthly inbound cap?
Nothing breaks. Every inbound message is still received and you still get notified, with sender and subject visible, but the body and attachments are locked until you upgrade or your monthly cap resets. Nothing is lost.
Give your agent an inbox
One API call creates a mailbox. Your agent has a real email address in seconds.