A pricing page and a knowledge base that disagree on which card you can use

Sendlane’s pricing page lists Visa, Mastercard, American Express, and Discover as accepted cards, while its own knowledge base excludes Discover and prepaid cards outright — the vendor publishes both lists, with no note on which one is current. Klaviyo draws its own line differently: card only below two thousand dollars a month of plans, and only past that threshold does non-card billing open, by wire or automated clearing house payment through Customer Success, with a W-9 provided automatically and late payments carrying one and a half percent monthly interest.

A support page that gives itself three different opening hours

Sendlane’s knowledge base states support runs Monday through Friday, seven in the morning to three in the afternoon Pacific time; its pricing page advertises support around the clock, every day of the year, starting from the Professional tier; its Contact Us page advertises “Online 24/7” — the vendor publishes all three, unreconciled. Klaviyo, by contrast, states email support runs around the clock and chat five days a week on every paid tier, with the free tier limited to sixty days of email support and no phone channel at all.

A WooCommerce guide that outlives its own discontinuation notice

Sendlane keeps a WooCommerce integration guide published on its site while its getting-started materials state the integration is “no longer supported” — the vendor publishes both. Klaviyo names ten native e-commerce platforms including WooCommerce, Shopify, Magento, BigCommerce, and Wix, and for Shopify specifically syncs fifteen metrics in real time after an initial ninety-day history pull and a full backfill.

What survives your Sendlane account after you close it depends on which page you read

Sendlane’s cancellation page states that data is lost once the account is terminated, while its privacy policy instead promises six months of retention followed by indefinite archiving of purchase data — the vendor publishes both. Klaviyo draws a cleaner line: downgrading or cancelling keeps the data in place, closing the account erases it immediately, and an export requested beforehand stays listed for only thirty days.

Two attribution windows, credited on different signals entirely

Klaviyo credits an order to the last touch within a default window of five days on both clicks and opens — an open alone is enough to credit a sale — configurable up to ninety days. Sendlane also runs last-touch attribution over a window adjustable from one to thirty days, five days by default for email, one day by default for a sent text message and five for a clicked one, letting a single purchase get credited to several messages at once while cancelled or returned revenue is never subtracted, on data running one to four hours behind.

Billed on two units that do not convert into one another

Klaviyo charges for active profiles and email send volume together, plus a separate mobile-messaging subscription for text messages, push, and WhatsApp, with three different ways to handle an overage — paid flexible overage, an automatic tier upgrade, or a full stop. Sendlane instead bills on sending credits with unlimited contacts included, upgrading tiers automatically or charging a cost-per-thousand fee on overage, applying the same logic to text-message credits once they fall to ten percent remaining, and never prorating a downgrade.