Customer.io vs Mailchimp pricing
Mailchimp starts 5.0× cheaper on its entry plan. Cheapest paid plan: $100 vs $20.
How they differ
Mailchimp is the cheaper way in by a wide margin — Customer.io costs about 5.0× as much to start.
Mailchimp publishes a free tier; Customer.io does not, so trying Customer.io means either a trial or a card.
Named on Customer.io's pricing page but not Mailchimp's: ai chatbot, audit log, email support, hipaa, role permissions, sso.
Named on Mailchimp's pricing page but not Customer.io's: custom branding, phone support.
Since recording began Mailchimp has logged 13 pricing changes and Customer.io none.
| Measure | Customer.io | Mailchimp |
|---|---|---|
| Cheapest paid plan | $100 | $20 |
| Dearest published plan | $1,000 | $20 |
| Free plan | No | Yes |
| Charged | One price | One price |
| Free trial | — | 14 days |
| Plans published | 3 | 4 |
| Top plan is price-on-request | Yes | Yes |
| Pricing changes logged | 0 | 13 |
Customer.io
Last checked 05 Oct 2026
| Plan | Monthly | Annual, per month | Includes |
|---|---|---|---|
| Essentials flat price | $100 | — | 1,000,000 emails per month, 25 inbox previews, 2 object types |
| Enterprise flat price | Contact sales | — | — |
| Premium flat price | — | $1,000 | 10 object types, Unlimited workspaces |
Mailchimp
Last checked 05 Oct 2026
| Plan | Monthly | Annual, per month | Includes |
|---|---|---|---|
| Free flat price | Free | — | 250 contacts, 500 monthly email sends |
| Standard flat price | $20 | — | 5 audiences, 200 marketing automation flows, 6,000 monthly email sends |
| Essentials flat price | — | — | 3 audiences, 4 marketing automation flows, 2 role-based roles |
| Premium flat price | Contact sales | — | 150,000 monthly email sends, Unlimited users |
Both read from each vendor's public pricing page. Feature sets differ, so compare the plans, not only the numbers.
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