How much does Amazon SES cost?

Amazon SES is pay-as-you-go with no fixed monthly plan. Outbound email through shared sending costs $0.10 per 1,000 emails, or $0.0001 per message, and is billed per recipient rather than per message. Additional charges apply for outgoing attachment data, dedicated IP addresses, and inbound email processing.

What SDKs and languages does Customer.io support?

Customer.io maintains official server side libraries for Ruby, Python, Go, and Node.js. It also offers official client SDKs for JavaScript on the web, iOS, Android, React Native, and Flutter. Integrations are built on its Pipelines API and Track API for ingesting data and its App API for sending messages.

Can I use AWS SES and Customer.io together?

Yes. Many teams route different message types through different providers or fail over between them. Courier lets you send through both behind a single API and switch providers without changing your code.

AWS SES vs Customer.io

Two transactional email providers, compared on price, features and ratings, so you can pick fast.

AWS SES wins price and deliverabilityCustomer.io wins sending APIs and reviews

Updated November 2026

At a glanceAWS SESCustomer.io

Cost per 1k @ 100k$0.1—

G2 rating4.24.4

Trustpilot2.33.2

Drag-and-drop editorNoYes

THE VERDICT

AWS SES wins on price and deliverability. Customer.io wins on sending APIs and reviews.

AWS SES and Customer.io take different pricing approaches. Customer.io rates higher with developers (4.4 vs 4.2 on G2). Pick based on volume and team, and the scorecard below breaks down where each one leads.

Which should you choose?

Pick AWS SES

✓It is suitable for developers on the AWS ecosystem who want to integrate a mailing system into their software.

✓It is suitable for firms or brands to send bulk transactional emails.

✓It is an excellent tool for email marketing.

Set up AWS SES with Courier →

Pick Customer.io

✓You need behavior-triggered lifecycle messaging across email, push, and SMS

✓You want journeys driven by real-time user/event data and a unified profile

✓You're consolidating marketing automation and transactional messaging

✓You need EU data residency or HIPAA-grade compliance

Feature by feature

Winner cells are tinted, green where AWS SES leads, violet where Customer.io does.

capability

AWS SES

Customer.io

Pricing

Starting paid plan

$0/mo

$100/mo

Cost per 1k @ 100k

$0.1

—

Pricing model

Pay-as-you-go

Subscription

Overage

$0.10 per 1,000 emails (flat Pay-as-you-go)

Profile-based pricing: additional profiles $0.009 each; additional emails $0.12 per 1,000 over the plan's bundled allowance; AI credits $10/100K. Email volume does not map to a per-email tier.

Deliverability

Dedicated IP

Add-on

Plan-gated

Deliverability tooling

Yes

Automated IP warmup

Yes

Suppression management

Yes

SPF / DKIM / DMARC

Yes

BIMI

Yes

—

API & sending

Transactional API

Yes

Marketing campaigns

Yes

SMTP relay

Yes

Inbound routing

Yes

Dynamic templates

Yes

Batch send

Yes

Scheduled send

—

Yes

Developer experience

Official SDKs

Java, Python, JavaScript/Node.js, .NET, Ruby, Go, PHP, C++

Ruby, Python, Node.js, Go, PHP, JavaScript (Web), iOS, Android, React Native, Flutter, Expo

Event webhooks

Yes

Drag-and-drop editor

Yes

Custom HTML editor

Yes

Email validation

Add-on

Sandbox / test mode

Yes

—

Analytics

Open / click tracking

Yes

Analytics dashboard

Yes

A/B testing

Yes

Compliance

EU data residency

Yes

SOC 2

Yes

HIPAA

BAA

GDPR

Yes

ISO 27001

Yes

Support

Support channels

Email, Chat, Phone (via AWS Support plans)

Community + email (Essentials); chat (Standard); dedicated CSM + technical specialist (Premium/Enterprise)

24/7 support

Yes

—

Support SLA

Plan-gated

Migration assistance

—

Yes

FAQ

Common questions

Customer.io rates higher on G2 (4.4 vs 4.2). Ratings are aggregated from public review platforms as of the date shown.

Keep comparing

Related comparisons

AWS SES vs PostmarkEmail→AWS SES vs MailgunEmail→AWS SES vs SendGridEmail→AWS SES vs SparkPostEmail→AWS SES vs OneSignal EmailEmail→AWS SES vs MailjetEmail→

Why not both?

Use both behind one API.

Route AWS SES, Customer.io, or both, and switch providers without changing your code. Courier sits in front of every channel.

Start building free Read the docs

Pricing, plans and feature availability as of November 2026 and may change. Ratings are aggregated from public review platforms.