Klaviyo vs. Boostmail cost calculator
Klaviyo charges for every contact in your account. Boostmail charges only for the emails you send, and the first 20,000 emails every 30 days are free. Enter your contacts and how often you email them to see the side-by-side monthly cost.
That is 40,000 emails every 30 days.
Boostmail
$15/mo
Klaviyo
$150/mo
Boostmail is $135/mo cheaper for 10,000 contacts at 4 emails each.
Klaviyo pricing as of 2026-09-30. Source: Klaviyo Shopify App Store listing. Klaviyo prices by contacts. Boostmail charges only for emails sent: the first 20,000 every 30 days are free, and there is no charge per contact.
How to read this calculator
Enter how many contacts you have and how many emails each one gets in 30 days. The calculator multiplies the two to get your send volume, prices it on Boostmail's published pay-per-send rates, and shows it next to Klaviyo's price for the same number of contacts. Klaviyo's figure comes from its Shopify App Store listing, with the verification date shown beneath the result so you always know how current it is.
The two platforms charge for different things, and that difference is the whole story. Klaviyo's price is set by how many people you have. Boostmail's price is set by how many emails you send.
Two different pricing models
The headline numbers diverge because Boostmail and Klaviyo price on different things.
Boostmail, pay only for emails sent
Boostmail charges for emails sent, never for contacts. The first 20,000 emails every 30 days are free, then you pay $0.50 per 1,000, dropping to $0.35 and then $0.30 per 1,000 at higher volumes, plus a small base fee on paid plans. A contact you do not email costs nothing.
- First 20,000 emails every 30 days free
- No charge per contact
- Every feature on every plan
Klaviyo, contacts, with sending limits
Klaviyo prices on the number of contacts in your account and pairs each tier with a monthly send allowance; exceeding it pushes you up a plan. Klaviyo's published Shopify App Store tiers start at a free plan for 250 contacts, then roughly $30/mo at 1,000, $150/mo at 10,000, and $720/mo at 50,000 contacts.
Klaviyo pricing as of 2026-09-30. Source: Klaviyo Shopify App Store listing.
The practical upshot: on Boostmail your bill rises only when you send more. For example, 10,000 contacts emailed 4 times in 30 days is 40,000 emails, which costs $15. A large list you rarely email costs very little.
Why pay-per-send lets you keep every subscriber
Every list collects contacts you rarely email: past buyers, seasonal shoppers, people who signed up for one coupon. On a contact-priced plan each of them adds to your bill every month, so stores end up deleting contacts just to stay on a cheaper tier. Boostmail never charges per contact, so you can keep them all and only pay when you actually email them.
Run your own numbers in the calculator above, then dig into the full feature-by-feature breakdown in our Boostmail vs. Klaviyo comparison, or see every plan on the pricing page.
No charge per contact, first 20,000 emails free, free to install.
See what you would save with Boostmail
Install free, sync your Shopify customers, and start sending. Your first 20,000 emails every 30 days are free, and you never pay per contact.