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Customer.io: Customer.
| Tier | Price |
|---|---|
| Free | 14-day free trial |
| Starter | $100/mo (Essentials, 5K profiles) |
| Pro | $1,000/mo (Premium) |
| Enterprise | Custom pricing |
Pricing verified March 2026.
| Customer.io | Resend | Beehiiv | ActiveCampaign | |
|---|---|---|---|---|
| Price | $100/mo (Essentials, 5K profiles) | $20/mo (Pro, 50K emails) | $49/mo (Scale) | $15/mo (Starter, 1K contacts) |
| Rating | ★ 4.3 | ★ 4.5 | ★ 4.4 | ★ 4.4 |
| Verdict | Situational | Recommended | Recommended | Recommended |
Customer.io is the most powerful event-driven messaging platform. For companies with engineering resources and data infrastructure, it enables messaging precision that general email tools cannot achieve. The $100/mo entry price and technical requirements limit the audience, but the capability ceiling is the highest in the category.
Reviewed by AICores Editorial Team
Last updated: May 2026
See how Customer.io stacks up against the top alternatives.
Customer.io vs Resend→| Free Tier | ✓ | ✓ | ✓ | ✓ |