The Customer.io alternative built for modern teams
Customer.io is powerful but charges per profile, making it expensive as you grow. Sendbound charges per email sent, with usage-based pricing that scales fairly with your actual usage.
Built for a better email experience
Expensive profile-based pricing
Customer.io charges you based on the number of profiles you track, regardless of how often you email them. Sendbound charges for actual usage, making it far more cost-effective as your user base grows.
No native React Email support
If you want to manage your email templates as code, Customer.io forces you into Liquid templates and raw HTML. Sendbound is built natively around React Email.
Overkill for many teams
Customer.io is a complex, heavy platform designed for large marketing teams. Sendbound provides the automations and triggers you need without the overwhelming enterprise bloat.
No free tier
Customer.io is a significant investment from day one. Sendbound gives you a generous free tier so you can build your MVP and scale only when you need to.
What you actually pay at scale
See full pricing →| Plan | Volume | Sendbound |  Customer.io | You save |
|---|---|---|---|---|
| Free | 3,000 / mo | $0 | None | Free forever |
| Starter | 50,000 / mo | $19 | $100 | 81% less |
| Growth | 250,000 / mo | $59 | $300 | 80% less |
| Scale | 1,000,000 / mo | $149 | $1,000+ | 85% less |
Prices shown are list price at time of writing. Sendbound free tier: 3,000 emails/month included, no credit card required.
Compare the essentials
| Feature | Sendbound | Customer.io |
|---|---|---|
| React Email native support | ||
| Pricing model | Per email sent | Per profile |
| Free tier | 3,000 emails/mo | None |
| API latency (p50) | 23ms | Average |
| Real-time event webhooks | ||
| Inbound email routing | ||
| Visual journey builder | ||
| A/B testing | ||
| Dedicated IP options | ||
| Push notifications | ||
| MCP server (AI agents) | ||
| AI template generation |
Move from Customer.io in four steps
Avg time: < 1 hourVerify your domain
Add your sending domain. We walk you through DNS, DKIM, and SPF and verify automatically.
Install the SDK
One command. TypeScript types and IntelliSense included out of the box.
Swap the API call
Change your import and key. The REST API is intentionally familiar.
Go live
We monitor your first send live and stay on call. Lists, webhooks, and templates come with you.
Developers who made the switch
Our Customer.io bill was scaling with our user base, not our email volume. Switching to Sendbound's usage-based pricing saved us thousands.
The ability to write our automation sequences via API and template in React made Sendbound the obvious choice for our engineering team.
Common questions about switching from Customer.io
Ready to leave Customer.io behind?
Migrate in under an hour. Step-by-step guide included, and our team is on call for your first send.