Cloudflare Email Service vs Customer.io pricing

Verified 2026-10-24 (1 day ago)Source: Cloudflare Email Service: developers.cloudflare.com/email-service/platform/pricing/, Customer.io: customer.io/pricingVerified shows the older of the two.

Monthly cost at three volumes

Monthly cost of Cloudflare Email Service and Customer.io at three volumes and at your own
Volume	Cloudflare Email Service	Customer.io
small5K emails sent	$0.70 / moWorkers Paid	$100 / moEssentials
growing50K emails sent	$16.45 / moWorkers Paid	$100 / moEssentials
scale500K emails sent	$173.95 / moWorkers Paid	$100 / moEssentials
your volumeset above	$16.45 / moWorkers Paid	$100 / moEssentials

Each cell is the cheapest feasible plan, or the chosen model, at that volume, from the shared Overage cost function. "Cheapest model" only considers models with both an input and an output price listed. Volumes are example scenarios you can edit.

Tiers, aligned by position

Tiers of Cloudflare Email Service and Customer.io aligned by position: free, entry, mid, top
Position	Cloudflare Email Service	Customer.io
Free	no tier	no tier
Entry	unlistedWorkers Free	$100 / moEssentials · 1,000,000 emails sent / mo
Mid	no tier	$1,000 / moPremium
Top	unlistedWorkers Paid · 3,000 emails sent / mo	Contact salesEnterprise

Tightest rate limit

Tightest documented rate limit of each service
Measure	Cloudflare Email Service	Customer.io
Tightest limit	unlisted	unlisted

Changes in the last 90 days

No changes recorded.

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