Our take
Pick Customer.io if lifecycle teams who will start on Essentials at $100 / month (5k profiles, 1 million emails) while they open a first Consent state, then book Premium at $1,000 / month yearly when they want custom volume and HIPAA. Pick Mailtrap if dev / lifecycle teams who will stay on Sending Free at $0 (4,000 emails / month) while they open a first Stats chart, then buy Basic at $15 / month (10,000 emails) or
Best for
Customer.io Profiles, workflows, and consent you can price from $100
Mailtrap Delivery / open rates you chart at $0
Free plan
Customer.io No free plan
Mailtrap $0 · / month. 4,000 emails. “To try out Mailtrap.”
Lowest paid
Customer.io Premium $1/mo yearly
Mailtrap Sending Basic $15
Next step up
Customer.io Essentials $100
Mailtrap Sending Business from $85
Coding agent
Customer.io Workflows
Mailtrap
Runs where
Customer.io Hosted
Mailtrap Hosted
Watch out
Customer.io Essentials $100 is a starting tile for 5k profiles
Mailtrap Sending Free is 4,000 emails / month
Last checked
Customer.io 2026-10-23 · customer.io/pricing
Mailtrap 2026-10-23 · mailtrap.io/pricing
lifecycle teams who will start on Essentials at $100 / month (5k profiles, 1 million emails) while they open a first Consent state, then book Premium at $1,000 / month yearly when they want custom volume and HIPAA.
Read the Customer.io pagedev / lifecycle teams who will stay on Sending Free at $0 (4,000 emails / month) while they open a first Stats chart, then buy Basic at $15 / month (10,000 emails) or Business at $85 / month (100,000 emails).
Read the Mailtrap page
