Email APIs · side by side
Mandrill vs Robotomail
Compare Mandrill, Robotomail by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Mandrill
0
Robotomail
50
Mandrill
$0 / mo
Try for free · 0 emails
Robotomail
$19 / mo
Starter · 50 inboxes
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | Mandrill | Robotomail |
|---|---|---|
| Provider | Mailchimp | Robotomail |
| Billing unit | emails | inboxes |
| Plan at selected usage | Try for free | Starter |
| Monthly estimate | $0/mo | $19/mo |
| Workload | 0 emails | 50 inboxes |
| Free access | Up to 500 free demo/test email sends to a verified domain for new users. | Developer access varies |
| Published plans | Try for free, Transactional Email | Free, Starter, Growth, Scale |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Mandrill
- Mailchimp
- Robotomail
- Robotomail
Billing unit
- Mandrill
- emails
- Robotomail
- inboxes
Plan at selected usage
- Mandrill
- Try for free
- Robotomail
- Starter
Monthly estimate
- Mandrill
- $0/mo
- Robotomail
- $19/mo
Workload
- Mandrill
- 0 emails
- Robotomail
- 50 inboxes
Free access
- Mandrill
- Up to 500 free demo/test email sends to a verified domain for new users.
- Robotomail
- Developer access varies
Published plans
- Mandrill
- Try for free, Transactional Email
- Robotomail
- Free, Starter, Growth, Scale
Prices checked
- Mandrill
- 2026-10-08
- Robotomail
- 2026-10-08
Email APIs monthly cost
Mandrill: $0Robotomail: $19
Different workloads, separate estimates
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Email APIs feature comparison
| Email APIs | Mandrill | Robotomail |
|---|---|---|
| Support | Not listed | |
| Mailboxes | Not listed | 10 |
| Monthly sending per mailbox | Not listed | 15,000 |
| Daily per mailbox | Not listed | 500 |
| Monthly inbound | Not listed | 2,000 |
| Custom domains | Not listed | 1 |
| Storage | Not listed | 10 GB |
| Webhooks | Not listed | |
| SSE streaming | Not listed | |
| Dedicated IPs | Not listed | Not included — |
| MCP, CLI & API access | Not listed |
Support
- Mandrill
- Not listed
- Robotomail
Mailboxes
- Mandrill
- Not listed
- Robotomail
- 10
Monthly sending per mailbox
- Mandrill
- Not listed
- Robotomail
- 15,000
Daily per mailbox
- Mandrill
- Not listed
- Robotomail
- 500
Monthly inbound
- Mandrill
- Not listed
- Robotomail
- 2,000
Custom domains
- Mandrill
- Not listed
- Robotomail
- 1
Storage
- Mandrill
- Not listed
- Robotomail
- 10 GB
Webhooks
- Mandrill
- Not listed
- Robotomail
SSE streaming
- Mandrill
- Not listed
- Robotomail
Dedicated IPs
- Mandrill
- Not listed
- Robotomail
- Not included —
MCP, CLI & API access
- Mandrill
- Not listed
- Robotomail
Which email providers fit your needs?
Mandrill features & plan notes
- Send transactional emails via REST API or SMTP credentials
- Sold in blocks of 25,000 emails with volume discounts from $20 down to $10 per block
- Inbound email processing and real-time event webhooks
- Custom domain whitelabeling, dedicated IPs, and rules engine
- Up to 500 free email sends to your verified domain
- Streamlined template editing with drag and drop builder
- Developer documentation, guides, and SDK repositories
- Connect AI coding assistant directly through first-party MCP server
Robotomail features & plan notes
- Multi-tenant inboxes
- Event streaming
- Conversation threads
- 10 mailboxes
- 15,000 sends / month per mailbox
- 500 sends / day per mailbox
- 2,000 inbound / month
- 1 custom domain
- 10 GB storage
- Webhooks
- SSE streaming
- MCP, CLI & API access
- Email support
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricingMandrill vs Robotomail — FAQ
Mandrill: $0/month on Try for free at 0 emails. Robotomail: $19/month on Starter at 50 inboxes. Different billing units are not an equal-workload comparison. Estimates exclude unlisted add-ons and taxes.
Review SMTP or API integration, domain authentication, bounce and complaint events, suppression handling and delivery-log retention.
Only when the published plan actually bills by sends. Contacts, subscribers and inboxes stay in their own billing units.
Send transactional emails via REST API or SMTP credentials, Sold in blocks of 25,000 emails with volume discounts from $20 down to $10 per block, Inbound email processing and real-time event webhooks, Custom domain whitelabeling, dedicated IPs, and rules engine. Free access: Up to 500 free demo/test email sends to a verified domain for new users.. Check plan-specific availability and current terms on the provider's official pricing page.
Multi-tenant inboxes, Event streaming, Conversation threads. Free access: Developer access varies. Check plan-specific availability and current terms on the provider's official pricing page.