Customer.io vs Stripe Billing

Two Keep customers longer tools side by side: what each does, what it costs and who it suits.

The verdict Side by side Plans and pricing Who each is for Other options

The verdict

On the data we hold, it's close: neither pulls ahead on features, a free plan or AI access. The choice comes down to how you work.

What the data says

Both have an API and an MCP server, so either works with AI employees.
In our Keep customers longer ranking, Customer.io places 6 and Stripe Billing 12 of 14.

Side by side

Customer.io and Stripe Billing compared
At a glance	Customer.io	Stripe Billing
Starts at	$100/mo	€500/mo
Free plan	No	No
API	Yes	Yes
MCP server	Yes	Yes
Links	Visit	Visit

Plans and pricing

Customer.io

EssentialsFrom $100 a month billed monthly; 5,000 profiles and 1 million emails a month included.$100/mo
PremiumFrom $1,000 a month billed yearly, with custom profile and email volume.$12,000/yr

Stripe Billing

Monthly subscription: up to EUR 80,000 volumeOne-year contract, covers up to EUR 80,000 of Billing volume per month; 0.67% on volume above that.€500/mo
Monthly subscription: up to EUR 200,000 volumeOne-year contract, covers up to EUR 200,000 of Billing volume per month; 0.67% on volume above that.€1,200/mo
Monthly subscription: up to EUR 400,000 volumeOne-year contract, covers up to EUR 400,000 of Billing volume per month; 0.67% on volume above that.€2,350/mo
Monthly subscription: up to EUR 850,000 volumeOne-year contract, covers up to EUR 850,000 of Billing volume per month; 0.67% on volume above that.€4,900/mo

Prices as the vendors list them. They change often; the final price is on their sites.

Who each is for

Choose Customer.io if…

Product and lifecycle teams at SaaS and consumer apps that want behaviour-triggered messages across email, SMS, push and in-app, and have an engineer or data-minded marketer to wire up events.

Visit Read the review

Choose Stripe Billing if…

SaaS and subscription businesses already on Stripe that need recurring, tiered or usage-based billing with invoicing and automatic recovery of failed payments.

Visit Read the review

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