Email APIs · side by side
Resend vs Robotomail
Compare Resend, 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.
Resend
100K
Robotomail
50
Resend
$90 / mo
Scale · 100K 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 | Resend | Robotomail |
|---|---|---|
| Provider | Resend | Robotomail |
| Billing unit | emails | inboxes |
| Plan at selected usage | Scale | Starter |
| Monthly estimate | $90/mo | $19/mo |
| Workload | 100K emails | 50 inboxes |
| Free access | 3,000 emails/mo | Developer access varies |
| Published plans | Free, Pro, Scale, Enterprise | Free, Starter, Growth, Scale |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Resend
- Resend
- Robotomail
- Robotomail
Billing unit
- Resend
- emails
- Robotomail
- inboxes
Plan at selected usage
- Resend
- Scale
- Robotomail
- Starter
Monthly estimate
- Resend
- $90/mo
- Robotomail
- $19/mo
Workload
- Resend
- 100K emails
- Robotomail
- 50 inboxes
Free access
- Resend
- 3,000 emails/mo
- Robotomail
- Developer access varies
Published plans
- Resend
- Free, Pro, Scale, Enterprise
- Robotomail
- Free, Starter, Growth, Scale
Prices checked
- Resend
- 2026-10-08
- Robotomail
- 2026-10-08
Email APIs monthly cost
Resend: $90Robotomail: $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 | Resend | Robotomail |
|---|---|---|
| Single sign-on | With add-on | Not listed |
| Support | Not listed | |
| Daily limit | No limit | Not listed |
| Inbound emails | Not listed | |
| RESTful API | Not listed | |
| SMTP relay | Not listed | |
| Official SDKs | Not listed | |
| Schedule emails | Not listed | |
| Batch sending | Not listed | |
| Open tracking | Not listed | |
| Link tracking | Not listed | |
| React Email | Not listed | |
| Custom domains | 1,000 | 1 |
| Additional domains | With add-on | Not listed |
| Dedicated IPs | With add-on | Not included — |
| Dedicated IP warming | Not listed | |
| Pristine shared IPs | Not listed | |
| Automatic suppression list | Not listed | |
| Bounce details | Not listed | |
| Multi-region | Not listed | |
| Data retention | 30 days | Not listed |
| Deliverability insights | Not listed | |
| DKIM, SPF, DMARC authentication | Not listed | |
| Webhook endpoints | 10 endpoints | Not listed |
| Webhook events | All events | Not listed |
| Social login | Not listed | |
| GDPR compliance | Not listed | |
| SOC 2 Type II certification | Not listed | |
| Penetration testing | Not listed | |
| DDoS protection | Not listed | |
| Automated backups | Not listed | |
| Multi-factor authentication | Not listed | |
| API key permissions | Not listed | |
| Signed webhook endpoints | Not listed | |
| Ticket support | Not listed | |
| Slack support | Not listed | |
| Urgent response SLA | Not listed | |
| Deliverability expertise | Not listed | |
| In-app documentation | Not listed | |
| AI assistant | Not listed | |
| AI credits / mo | 500 | 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 |
| Storage | Not listed | 10 GB |
| Webhooks | Not listed | |
| SSE streaming | Not listed | |
| MCP, CLI & API access | Not listed |
Single sign-on
- Resend
- With add-on
- Robotomail
- Not listed
Support
- Resend
- Not listed
- Robotomail
Daily limit
- Resend
- No limit
- Robotomail
- Not listed
Inbound emails
- Resend
- Robotomail
- Not listed
RESTful API
- Resend
- Robotomail
- Not listed
SMTP relay
- Resend
- Robotomail
- Not listed
Official SDKs
- Resend
- Robotomail
- Not listed
Schedule emails
- Resend
- Robotomail
- Not listed
Batch sending
- Resend
- Robotomail
- Not listed
Open tracking
- Resend
- Robotomail
- Not listed
Link tracking
- Resend
- Robotomail
- Not listed
React Email
- Resend
- Robotomail
- Not listed
Custom domains
- Resend
- 1,000
- Robotomail
- 1
Additional domains
- Resend
- With add-on
- Robotomail
- Not listed
Dedicated IPs
- Resend
- With add-on
- Robotomail
- Not included —
Dedicated IP warming
- Resend
- Robotomail
- Not listed
Pristine shared IPs
- Resend
- Robotomail
- Not listed
Automatic suppression list
- Resend
- Robotomail
- Not listed
Bounce details
- Resend
- Robotomail
- Not listed
Multi-region
- Resend
- Robotomail
- Not listed
Data retention
- Resend
- 30 days
- Robotomail
- Not listed
Deliverability insights
- Resend
- Robotomail
- Not listed
DKIM, SPF, DMARC authentication
- Resend
- Robotomail
- Not listed
Webhook endpoints
- Resend
- 10 endpoints
- Robotomail
- Not listed
Webhook events
- Resend
- All events
- Robotomail
- Not listed
Social login
- Resend
- Robotomail
- Not listed
GDPR compliance
- Resend
- Robotomail
- Not listed
SOC 2 Type II certification
- Resend
- Robotomail
- Not listed
Penetration testing
- Resend
- Robotomail
- Not listed
DDoS protection
- Resend
- Robotomail
- Not listed
Automated backups
- Resend
- Robotomail
- Not listed
Multi-factor authentication
- Resend
- Robotomail
- Not listed
API key permissions
- Resend
- Robotomail
- Not listed
Signed webhook endpoints
- Resend
- Robotomail
- Not listed
Ticket support
- Resend
- Robotomail
- Not listed
Slack support
- Resend
- Robotomail
- Not listed
Urgent response SLA
- Resend
- Robotomail
- Not listed
Deliverability expertise
- Resend
- Robotomail
- Not listed
In-app documentation
- Resend
- Robotomail
- Not listed
AI assistant
- Resend
- Robotomail
- Not listed
AI credits / mo
- Resend
- 500
- Robotomail
- Not listed
Mailboxes
- Resend
- Not listed
- Robotomail
- 10
Monthly sending per mailbox
- Resend
- Not listed
- Robotomail
- 15,000
Daily per mailbox
- Resend
- Not listed
- Robotomail
- 500
Monthly inbound
- Resend
- Not listed
- Robotomail
- 2,000
Storage
- Resend
- Not listed
- Robotomail
- 10 GB
Webhooks
- Resend
- Not listed
- Robotomail
SSE streaming
- Resend
- Not listed
- Robotomail
MCP, CLI & API access
- Resend
- Not listed
- Robotomail
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Which email providers fit your needs?
Resend features & plan notes
- React Email
- Simple API
- Webhooks
- All Pro features
- 1,000 domains
- Dedicated Slack channel
- 10 webhook endpoints
- 500 AI credits / mo
- SSO with add-on
- Dedicated IP with add-on
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 pricing