Customer.io vs Mails.ai
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.ioMails.ai
mails.ai
Outbound email platform combining mailbox warm-up, deliverability monitoring and AI-assisted sequence writing, aimed at teams running cold campaigns at volume.
Email Marketing
Visit Mails.ai| Customer.io | Mails.ai | |
|---|---|---|
| Entry price | $100/mo | Custom / not published |
| Pricing model | Free trial | Free trial |
| Free plan | No | No |
| Category | Email Marketing | Email Marketing |
| Around since | 2012 | 2025 |
Prices are indicative entry-tier figures, not verified quotes. Both vendors change pricing without notice.