Customer.io vs MJML: Pricing Comparison 2026
Side-by-side pricing comparison of Customer.io and MJML. See all plans, features, and costs at a glance.
Bottom line: Customer.io starts at $100/mo and MJML starts at Custom pricing. Compare all 4 pricing tiers side by side.
Last updated: March 16, 2026
Customer.io vs MJML: Quick Pricing Facts
| Feature | Customer.io | MJML |
|---|---|---|
| Starting Price | $100/mo | Custom pricing |
| Number of Plans | 3 | 1 |
| Free Tier | No | Yes |
| Pricing Model | usage-based | open-source |
| Annual Discount | N/A | N/A |
Customer.io and MJML are both priced at $100/mo, making them equally accessible Email Marketing tools. Together they offer 4 pricing plans with 3 features compared, so the best choice comes down to which features match your needs.
MJML stands out with a free plan for getting started. Customer.io uses usage-based pricing while MJML uses open-source pricing, which may affect your total cost at scale.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your Email Marketing needs.
| Pricing Plans |  Customer.io Try it free |  MJML Try it free |
|---|---|---|
| Tier 1 | Essentials $100/month | Free $0/monthCheapest Includes
|
| Tier 2 | Premium $1000/monthCheapest | — |
| Tier 3 | Enterprise Custom pricing | — |
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MJML
MJML offers a free plan.
Based on pricing data only. Review the full comparison below for your specific needs.
Best value: MJML
Try MJML freeWhich Should You Choose?
Choose Customer.io if:
- •You need 3 pricing tiers for flexible team sizing—more options mean less overpaying for features you don't need
- •Your team needs custom enterprise pricing—Customer.io offers negotiated terms for large deployments
- •You prioritize Customer.io's user experience and interface over price (both tools are similarly priced)
Choose MJML if:
- •You need a free plan with Open-source email framework, Responsive emails—MJML offers no-cost access with no credit card required
- •You want more features built-in—MJML offers 3 additional features across its plans
- •You prioritize MJML's user experience and interface over price (both tools are similarly priced)
MJML offers a free plan [1], eliminating the cost barrier for evaluation, while Customer.io requires paid subscription from the start. This gives MJML a significant advantage for teams with budget constraints or extended trial periods. Once you outgrow MJML's free tier, upgrading to a paid plan at approximately Custom pricing provides substantial additional functionality. Compare this pricing path against Customer.io's tiering starting at $100/mo to assess total cost of ownership over 12 months. MJML's 1 tier provide flexibility at different budgets, while Customer.io's 3 tiers structure may force you into higher-cost plans than necessary for your use case. If evaluation cost matters to your decision, MJML is the obvious starting point with zero financial commitment. Use the free tier to validate core functionality before committing to paid plans from either tool.
Frequently Asked Questions: Customer.io vs MJML
How many pricing plans does Customer.io have vs MJML?
Does Customer.io or MJML offer a free plan?
Does Customer.io or MJML offer custom enterprise pricing?
What pricing models do Customer.io and MJML use?
How do Customer.io and MJML compare for Email Marketing?
Sources
- Customer.io Official Pricing— Vendor pricing page
- MJML Official Pricing— Vendor pricing page
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