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Overage / Compare / Email APIs

Customer.io vs Twilio SendGrid pricing

Verified 2026-10-23 (2 days ago)Source: Customer.io: customer.io/pricing, Twilio SendGrid: www.twilio.com/en-us/products/email-api/pricingVerified shows the older of the two.

Monthly cost at three volumes

These services do not bill on a shared metric, so a like-for-like cost is unlisted.

Tiers, aligned by position

Tiers of Customer.io and Twilio SendGrid aligned by position: free, entry, mid, top
PositionCustomer.ioTwilio SendGrid
Freeno tier$0 onceFree Trial
Entry$100 / moEssentials · 1,000,000 emails sent / mo$19.95 / moEssentials
Mid$1,000 / moPremium$89.95 / moPro
TopContact salesEnterpriseContact salesPremier

Tightest rate limit

Tightest documented rate limit of each service
MeasureCustomer.ioTwilio SendGrid
Tightest limitunlisted100 emails sent per dayFree Trial tier

Changes in the last 90 days

No changes recorded.

No change detected for either service in the last 90 days.