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Email Marketing

Customer.io vs Resend: Pricing Comparison 2026

Side-by-side pricing comparison of Customer.io and Resend. See all plans, features, and costs at a glance.

Bottom line: Resend starts at $20/mo, making it $80/mo cheaper than Customer.io ($100/mo). Resend offers a free plan.

Last updated: August 24, 2026

Data compiled by Arthur Jacquemin
Updated August 24, 2026
Try Customer.io freeTry Resend freeUpdated this monthPrice updated 6d ago
Best Value

Resend - Resend offers a free plan, starts at $80/mo lower ($20/mo vs $100/mo), offers 4 tiers vs 3.

Customer.io vs Resend: Quick Pricing Facts

FeatureCustomer.ioResend
Starting Price$100/mo$20/mo
Number of Plans34
Free TierNoYes
Pricing Modelusage-basedusage-based
Annual DiscountN/AN/A

Resend is the more affordable option, starting at $20/mo compared to Customer.io's $100/mo. Both are Email Marketing tools with 7 combined pricing plans and 32 features compared.

Resend 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
Customer.io
Try free
Resend
Resend
Try free
Tier 1
Essentials
$100/month
Start with Essentials
FreePopular
$0/monthCheapest
Includes
  • Sending & receiving
  • Ticket support
  • 10,000 automation runs
  • 30-day data retention
  • 3 domains
  • 5 AI credits / mo
  • 100 emails a day
  • Dedicated IPs
Start with Free
Tier 2
Premium
$1000/month
Start with Premium
ProPopular
$20/monthCheapest
Includes
  • Sending & receiving
  • Ticket support
  • 10,000 automation runs
  • 30-day data retention
  • 10 domains
  • 100 AI credits / mo
  • No daily limit
  • Dedicated IPs
Start with Pro
Tier 3
Enterprise
Custom pricing
Start with Enterprise
ScalePopular
$90/monthCheapest
Includes
  • Sending & receiving
  • Slack & ticket support
  • 10,000 automation runs
  • 30-day data retention
  • 1,000 domains
  • 500 AI credits / mo
  • No daily limit
  • Dedicated IP with add-on
Start with Scale
Tier 4
-
EnterprisePopular
Custom pricing
Includes
  • Sending & receiving
  • Priority support
  • Flexible automation runs
  • Flexible data retention
  • Flexible domains
  • Flexible AI credits
  • No daily limit
  • Dedicated IPs with add-on
Start with Enterprise

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Customer.io

Automated messaging platform for targeted customer engagement

View all Customer.io plans

Resend

Developer-first email API for transactional and marketing emails

View all Resend plans

Frequently Asked Questions: Customer.io vs Resend

Which is cheaper, Customer.io or Resend?
As of August 2026, Resend starts at a lower price point. Customer.io starts at $100/mo while Resend starts at $20/mo. However, the best value depends on the features you need at each tier.
How many pricing plans does Customer.io have vs Resend?
Customer.io offers 3 pricing plans, while Resend offers 4 plans. More plans typically means more flexibility to match your exact needs and budget.
Does Customer.io or Resend offer a free plan?
Resend offers a free plan, while Customer.io does not. If budget is a concern, Resend lets you get started at no cost.
What is the most popular Resend plan?
The Free plan is Resend's most popular tier, priced at Free. Key features include Sending & receiving, Ticket support, 10,000 automation runs.
Does Customer.io or Resend offer custom enterprise pricing?
Yes, both Customer.io and Resend offer custom enterprise pricing tiers with quote-based pricing. Contact each vendor for a tailored quote.
How do Customer.io and Resend compare for Email Marketing?
Both Customer.io and Resend are Email Marketing tools. Customer.io offers 3 plans starting at $100/mo, while Resend offers 4 plans starting at $20/mo. Review the feature breakdowns above to see which better fits your Email Marketing needs.
AI Recommendations

Sources

  1. Customer.io Official Pricing- Vendor pricing page
  2. Resend Official Pricing- Vendor pricing page

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