Email APIs · side by side
Amazon SES vs Customer.io
Compare Amazon SES, Customer.io 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.
Amazon SES
Customer.io
Amazon SES
$10 / mo
À la carte · 100K emails
Customer.io
Custom / not listed
Custom / unlisted usage pricing · 25K profiles
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 | Amazon SES | Customer.io |
|---|---|---|
| Provider | Amazon Web Services | Customer.io |
| Billing unit | emails | profiles |
| Plan at selected usage | À la carte | Custom / unlisted usage pricing |
| Monthly estimate | $10/mo | Custom / not listed |
| Workload | 100K emails | 25K profiles |
| Free access | AWS Free Tier credits may apply | Trial |
| Published plans | À la carte, Essentials, Pro, Enterprise | Essentials, Premium, Enterprise |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Amazon SES
- Amazon Web Services
- Customer.io
- Customer.io
- Amazon SES
- emails
- Customer.io
- profiles
- Amazon SES
- À la carte
- Customer.io
- Custom / unlisted usage pricing
- Amazon SES
- $10/mo
- Customer.io
- Custom / not listed
- Amazon SES
- 100K emails
- Customer.io
- 25K profiles
- Amazon SES
- AWS Free Tier credits may apply
- Customer.io
- Trial
- Amazon SES
- À la carte, Essentials, Pro, Enterprise
- Customer.io
- Essentials, Premium, Enterprise
- Amazon SES
- 2026-10-08
- Customer.io
- 2026-10-08
Email APIs monthly cost
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.
Which email providers fit your needs?
Amazon SES features & plan notes
- Usage based
- AWS integration
- Dedicated IP options
Customer.io features & plan notes
- Behavioral messaging
- Lifecycle workflows
- Event triggers
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