Omnisend keeps every tier on a card; Klaviyo opens a door above two thousand dollars
Omnisend’s only published payment path is self-service card, at every tier — Free, Standard, or Pro. No invoice, purchase order, ACH, wire, or W-9 appears anywhere in its documentation; only an “Order Form” hints, without confirming, that a contract might exist. Payment is due within fifteen days, with a monthly late charge of one and a half percent. Klaviyo, for its part, opens a contracted, non-card path once a customer commits to two thousand dollars a month of plans, arranged through Customer Success, with ACH or wire and a W-9 supplied automatically — but below that line, it is card only as well, billed in advance, at the same one-and-a-half-percent monthly late rate.
Omnisend already tells you the state and the rate; Klaviyo tells you neither
Omnisend charges US sales tax in eight named states — Pennsylvania, Ohio, Arizona, Utah, Washington, Tennessee, Texas, and New York — at rates running from one to thirteen percent by ZIP code, with an exemption requiring a state-specific certificate. Klaviyo charges the same kind of tax at state and local level from the billing address, with no state list published at all, and an exemption that clears within three to five days once a certificate is filed. Neither vendor calculates anything for a merchant’s own downstream orders.
Neither cloud reaches the tier a regulated buyer would need
Omnisend names no US region for its own hosting; its Data Processing Agreement instead relies on Google Cloud Platform for physical security, with no SOC 2, FedRAMP, StateRAMP, GovCloud, or HIPAA business associate agreement in evidence. Its named sub-processors, Confluent and Cloudflare, are themselves US-based, even without Omnisend naming a US region of its own. Klaviyo commits to one location, AWS-East-1 in Northern Virginia, and holds SOC 2 Type II, ISO 27001, ISO 27017, and PCI DSS in its own name — but reaches the same absence on FedRAMP, StateRAMP, GovCloud, TX-RAMP, and any HIPAA BAA at all.
One meters the contact upfront, the other splits the meter in three
Omnisend bills per billable contact, paid upfront on a thirty-day cycle, with an email cap equal to twelve times the contact count; SMS is bought separately, where one credit equals one US dollar. Klaviyo instead meters two things at once, active profiles and send volume, plus a separate mobile subscription, and offers three different regimes once a customer goes over: a paid flexible overage, an automatic tier upgrade, or a full stop.
Seats are unlimited on one side, unpublished on the other
Omnisend places no minimum and no maximum on user seats at any plan, across six named roles from Owner to Content Creator. Klaviyo also names no seat minimum or ceiling across its eight roles, but publishes no per-seat price either way — leaving the actual cost of adding a team, on either platform, something a buyer has to ask about directly rather than read off a pricing page.
A number is not the same thing as an option
Klaviyo’s two-thousand-dollar figure is a real, published threshold: a merchant spending above it gets a contracted alternative to the card. Omnisend publishes no comparable figure at any spend level, so the question of a non-card path stays unanswered rather than merely expensive to reach.
