Customer.io vs Mailgun: Pricing Comparison 2026
Side-by-side pricing comparison of Customer.io and Mailgun. See all plans, features, and costs at a glance.
Bottom line: Mailgun starts at $15/mo, making it $85/mo cheaper than Customer.io ($100/mo). Mailgun offers a free plan.
Last updated: August 10, 2026
Mailgun - Mailgun offers a free plan, starts at $85/mo lower ($15/mo vs $100/mo), offers 13 tiers vs 3.
Customer.io vs Mailgun: Quick Pricing Facts
| Feature | Customer.io | Mailgun |
|---|---|---|
| Starting Price | $100/mo | $15/mo |
| Number of Plans | 3 | 13 |
| Free Tier | No | Yes |
| Pricing Model | usage-based | usage-based |
| Annual Discount | N/A | N/A |
Mailgun is the more affordable option, starting at $15/mo compared to Customer.io's $100/mo. Both are Email Marketing tools with 16 combined pricing plans and 0 features compared.
Mailgun stands out with a free plan for getting started.
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 free |  Mailgun Try free |
|---|---|---|
| Tier 1 | Essentials $100/monthCheapest | Enterprise: Send high-volume emails through the most reliable email API provider. Custom pricing |
| Tier 2 | Premium $1000/monthCheapest | Documentation: API resources to help you use Mailgun Custom pricing |
| Tier 3 | Enterprise Custom pricing | Release Notes: Keep up with what's in the Mailgun platform. Custom pricing |
| Tier 4 | - | Email Impact Report Custom pricing |
| Tier 5 | - | $0/mo $0/monthCheapest |
| Tier 6 | - | 100 emails/day included $100/monthCheapest |
| Tier 7 | - | $15/mo $15/monthCheapest |
| Tier 8 | - | 10,000 emails/mo included $10000/monthCheapest |
| Tier 9 | - | Extra emails & validations Custom pricing |
| Tier 10 | - | $35/mo $35/monthCheapest |
| Tier 11 | - | 50,000 emails/mo included $50000/monthCheapest |
| Tier 12 | - | $90/mo $90/monthCheapest |
| Tier 13 | - | 100,000 emails/mo included $100000/monthCheapest |
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Frequently Asked Questions: Customer.io vs Mailgun
Which is cheaper, Customer.io or Mailgun?
How many pricing plans does Customer.io have vs Mailgun?
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How do Customer.io and Mailgun compare for Email Marketing?
Sources
- Customer.io Official Pricing- Vendor pricing page
- Mailgun Official Pricing- Vendor pricing page
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