How much does Customer.io cost in 2026?

Customer.io is priced for product companies, not newsletter lists. Self-serve starts around $100/month (Essentials, 5,000 profiles, 1M emails/mo, all channels). Premium starts around $1,000/month. No permanent free plan — only a 14-day trial. Data Pipelines is a separate SKU from around $199/mo.

If you need SMTP for WordPress or have under 1,000 paying customers, Customer.io is overkill. Look at Postmark, Brevo or ActiveCampaign instead.