Customer.io alternatives
Customer.io is behavioural messaging for product teams. These are the other email marketing tools in the index, with what each one charges.
7 with a free plan8 start cheaper
| Tool | What it is | Pricing | Free plan |
|---|---|---|---|
| Customer.iothe one you asked about | Behavioural messaging for product teams | from $100/mo | No |
| Klaviyoklaviyo.com | Email and SMS built around e-commerce data | from $20/mo | Yes |
| Mailchimpmailchimp.com | Email campaigns and automations for small business | from $13/mo | Yes |
| Kitkit.com | Email marketing built for creators | from $33/mo | Yes |
| ActiveCampaignactivecampaign.com | Deep automation with a CRM attached | from $15/mo | Free trial |
| Mails.aimails.ai | Email API and inbox infrastructure for AI agents | from $20/mo | Yes |
| Brevobrevo.com | Email, SMS and chat on one affordable plan | from $10.80/mo | Yes |
| Resendresend.com | Developer-first email API | from $20/mo | Yes |
| MailerLitemailerlite.com | Clean, cheap email marketing | from $12/mo | Yes |
7 of these 9 prices were read from the vendor's own pricing page, most recently on 21 Sept 2026; the rest are indicative. Entry tier only — vendors change pricing without notice.
- Brevo$10.80
- MailerLite$12
- Mailchimp$13
- ActiveCampaign$15*
- Klaviyo$20*
- Mails.ai$20
- Resend$20
- Kit$33
- Customer.io$100
7 of these 9 prices were read from the vendor's own pricing page; the rest are marked * and are indicative. The median is across these 7, not the whole category.
Switching from Customer.io
- What is the cheapest alternative to Customer.io?
- Of the 8 alternatives here that publish an entry price, Brevo is the lowest at $10.80 a month. That is $89.20 a month less than Customer.io's $100.
- Is there a free alternative to Customer.io?
- 7 of these publish an ongoing free plan: Klaviyo, Mailchimp, Kit, Mails.ai, Brevo, Resend, MailerLite. A free plan is not a trial — it stays free, with limits set by the vendor.
- What can I use instead of Customer.io?
- The closest matches in the index are Klaviyo, Mailchimp, Kit, ActiveCampaign, Mails.ai. They sit in the same category and cover overlapping ground; the table above puts each one's entry price beside Customer.io's.
Head to head
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