Customer.io vs Resend
Both sit in email marketing. Here is how they differ on the things you can actually check.
Customer.io
customer.io
Triggers messages from product events rather than lists — email, push, in-app and SMS driven by what a user actually did. Data-warehouse-friendly.
Email Marketing
Visit Customer.ioResend
resend.com
Modern transactional email API with React-based templates, a clean dashboard and SDKs for most stacks. Built by former Vercel engineers.
Free planEmail Marketing
Visit Resend| Customer.io | Resend | |
|---|---|---|
| Entry price | $100/mo | $20/mo |
| Pricing model | Free trial | Free plan |
| Free plan | No | Yes |
| Category | Email Marketing | Email Marketing |
| Around since | 2012 | 2023 |
Prices are indicative entry-tier figures, not verified quotes. Both vendors change pricing without notice.