Email APIs · side by side
Resend vs SparkPost
Compare Resend, SparkPost by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
100K
Resend
$90 / mo
Scale · 100K emails
SparkPost
Custom / not listed
No priced plan for this volume · 100K emails
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 | SparkPost |
|---|---|---|
| Provider | Resend | Bird |
| Billing unit | emails | emails |
| Plan at selected usage | Scale | No priced plan for this volume |
| Monthly estimate | $90/mo | Custom / not listed |
| Workload | 100K emails | 100K emails |
| Free access | 3,000 emails/mo | Trial availability varies |
| Published plans | Free, Pro, Scale, Enterprise | SMS, WhatsApp, Lookup, Realtime, Phone numbers, Email, Apple Messages, Voice, Verify, Mailbox, eSIM, Email validation |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Resend
- Resend
- SparkPost
- Bird
Billing unit
- Resend
- emails
- SparkPost
- emails
Plan at selected usage
- Resend
- Scale
- SparkPost
- No priced plan for this volume
Monthly estimate
- Resend
- $90/mo
- SparkPost
- Custom / not listed
Workload
- Resend
- 100K emails
- SparkPost
- 100K emails
Free access
- Resend
- 3,000 emails/mo
- SparkPost
- Trial availability varies
Published plans
- Resend
- Free, Pro, Scale, Enterprise
- SparkPost
- SMS, WhatsApp, Lookup, Realtime, Phone numbers, Email, Apple Messages, Voice, Verify, Mailbox, eSIM, Email validation
Prices checked
- Resend
- 2026-10-08
- SparkPost
- 2026-10-08
Email APIs monthly cost
Resend: $90SparkPost: Not priced
Cost by emails
Cost curve data
| emails | Resend | SparkPost |
|---|---|---|
| 0 | $0 | $0 |
| 25K | $20 | Not priced |
| 50K | $20 | Not priced |
| 100K | $90 | Not priced |
| 200K | $155 | Not priced |
| 500K | $425 | Not priced |
| 1M | $875 | Not priced |
0
- Resend
- $0
- SparkPost
- $0
25K
- Resend
- $20
- SparkPost
- Not priced
50K
- Resend
- $20
- SparkPost
- Not priced
100K
- Resend
- $90
- SparkPost
- Not priced
200K
- Resend
- $155
- SparkPost
- Not priced
500K
- Resend
- $425
- SparkPost
- Not priced
1M
- Resend
- $875
- SparkPost
- Not priced
Email APIs feature comparison
| Email APIs | Resend | SparkPost |
|---|---|---|
| Sending methods | Not listed | Not listed |
| Inbound processing | Not listed | Not listed |
| Sending domains | Not listed | Not listed |
| Activity retention | Not listed | Not listed |
| Webhooks & events | Not listed | Not listed |
| Dedicated IP | Not listed | Not listed |
| Single sign-on | With add-on | Not listed |
| Support | Not listed | 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 | Not listed |
| Additional domains | With add-on | Not listed |
| Dedicated IPs | With add-on | Not listed |
| 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 |
Sending methods
- Resend
- Not listed
- SparkPost
- Not listed
Inbound processing
- Resend
- Not listed
- SparkPost
- Not listed
Sending domains
- Resend
- Not listed
- SparkPost
- Not listed
Activity retention
- Resend
- Not listed
- SparkPost
- Not listed
Webhooks & events
- Resend
- Not listed
- SparkPost
- Not listed
Dedicated IP
- Resend
- Not listed
- SparkPost
- Not listed
Single sign-on
- Resend
- With add-on
- SparkPost
- Not listed
Support
- Resend
- Not listed
- SparkPost
- Not listed
Daily limit
- Resend
- No limit
- SparkPost
- Not listed
Inbound emails
- Resend
- SparkPost
- Not listed
RESTful API
- Resend
- SparkPost
- Not listed
SMTP relay
- Resend
- SparkPost
- Not listed
Official SDKs
- Resend
- SparkPost
- Not listed
Schedule emails
- Resend
- SparkPost
- Not listed
Batch sending
- Resend
- SparkPost
- Not listed
Open tracking
- Resend
- SparkPost
- Not listed
Link tracking
- Resend
- SparkPost
- Not listed
React Email
- Resend
- SparkPost
- Not listed
Custom domains
- Resend
- 1,000
- SparkPost
- Not listed
Additional domains
- Resend
- With add-on
- SparkPost
- Not listed
Dedicated IPs
- Resend
- With add-on
- SparkPost
- Not listed
Dedicated IP warming
- Resend
- SparkPost
- Not listed
Pristine shared IPs
- Resend
- SparkPost
- Not listed
Automatic suppression list
- Resend
- SparkPost
- Not listed
Bounce details
- Resend
- SparkPost
- Not listed
Multi-region
- Resend
- SparkPost
- Not listed
Data retention
- Resend
- 30 days
- SparkPost
- Not listed
Deliverability insights
- Resend
- SparkPost
- Not listed
DKIM, SPF, DMARC authentication
- Resend
- SparkPost
- Not listed
Webhook endpoints
- Resend
- 10 endpoints
- SparkPost
- Not listed
Webhook events
- Resend
- All events
- SparkPost
- Not listed
Social login
- Resend
- SparkPost
- Not listed
GDPR compliance
- Resend
- SparkPost
- Not listed
SOC 2 Type II certification
- Resend
- SparkPost
- Not listed
Penetration testing
- Resend
- SparkPost
- Not listed
DDoS protection
- Resend
- SparkPost
- Not listed
Automated backups
- Resend
- SparkPost
- Not listed
Multi-factor authentication
- Resend
- SparkPost
- Not listed
API key permissions
- Resend
- SparkPost
- Not listed
Signed webhook endpoints
- Resend
- SparkPost
- Not listed
Ticket support
- Resend
- SparkPost
- Not listed
Slack support
- Resend
- SparkPost
- Not listed
Urgent response SLA
- Resend
- SparkPost
- Not listed
Deliverability expertise
- Resend
- SparkPost
- Not listed
In-app documentation
- Resend
- SparkPost
- Not listed
AI assistant
- Resend
- SparkPost
- Not listed
AI credits / mo
- Resend
- 500
- SparkPost
- Not listed
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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
SparkPost features & plan notes
- Deliverability analytics
- Enterprise scale
- Predictive signals
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