Checkout split testing software: test the whole pay step, bumps and upsells without breaking the ad link

Start with cost. Run your monthly revenue through our checkout cost calculator to narrow the field to two platforms. Then pick the one that fits your traffic and run a single checkout split test on it before you rebuild the funnel around it.

Features and prices below come from each vendor's own website and help center, following our research method. Vendors publish their own conversion-lift figures, and no independent benchmark backs them, so this page leaves them out.

What split testing a whole checkout covers

A headline test swaps the presell page and sends both versions to the same checkout. A checkout split test changes what happens at the pay step itself: the template and layout, the form fields, where the order bump sits, whether payment is one step or two, and which upsell funnel follows the order.

That last part is where the money hides. A layout that lifts front-end conversions but feeds a weaker one-click upsell sequence can lose on revenue per buyer. ElasticFunnels describes this directly on its split-testing page, where each variant can be sent "to a different checkout, upsell or offer". SamCart's version works on the checkout page and the upsell funnel attached to the product.

Same URL split testing vs two checkout links in your ads

There are two ways to split traffic between checkout versions, and the choice matters most to paid-traffic buyers.

• Same-URL rotation. The server picks the variant before the page loads, so the browser and the ad platform only ever see one address. ElasticFunnels works this way, and SamCart and ThriveCart rotate variants on the product's own checkout link.
• Redirect A/B. Each version lives on its own URL, and traffic is split by a weighted link or by running two ad sets. This is how most funnel builders handle step tests.

The cost of the second route shows up in the ad account. Plai's help doc on editing live campaigns notes that changing a Meta ad's destination URL triggers a fresh review and can pause the ad while it runs. Two ad sets pointed at two checkouts also split your budget and your learning between them. For email lists and organic visitors none of that applies, and redirect testing is fine. Our explainers on same-URL split testing and redirect A/B testing go further, and the head-to-head of the two methods lays out where each wins.

Pick the winner on revenue per visitor

The winning checkout is the one that makes more money per visitor, which is a different question from which one converts more. A version without a bump will often convert slightly better and earn less, because fewer buyers add the second item.

Tools differ a lot here. ElasticFunnels lets you set the primary metric to conversion rate, revenue, net revenue, AOV, EPC, profit or CPA, and applies a two-proportion z-test with a Bonferroni correction once you run three or more variants. SamCart reports views and conversions for each variation, and its help article on checkout split tests recommends waiting until a variation has at least 100 visitors before you call it.

Treat 100 visitors as a floor. If the test is about bump placement, model what a change in take rate is worth first with the order bump and upsell revenue calculator, so you know how big a difference you are looking for.

Funnel split testing software that handles checkout variants

These eight are grouped by the job they fit, not ranked. The first three keep one checkout link for your ads, the next four test checkout steps inside a funnel builder or order platform, and the last is the payment page many sellers already have.

ElasticFunnels is a funnel platform for teams running paid traffic, with pages, checkout, CRM and attribution on one data layer. Same-URL testing is its lead feature: the vendor says Facebook, Google and TikTok keep optimizing against the same creative and URL pair while variants rotate, and a visitor stays on the variant they first saw for seven days. Split testing is on every plan. The honest drawback is age. The team has been building it since 2023, so it is newer than the carts below and has very little independent review coverage, which means its claims rest on the vendor's word until you put real volume through it. More in our ElasticFunnels review and the ElasticFunnels vs ClickFunnels comparison.

SamCart is the checkout-first pick for sellers whose funnel is mostly the order page. You add one or more variations to a product's checkout and SamCart rotates them, then "Select Winner" applies the layout. Two limits matter: price cannot change between variations, and single upsells cannot be tested, only upsell funnels. Its help article also describes the workflow for the legacy builder, so confirm it applies to the page builder you use. See our SamCart review, its pricing breakdown, and SamCart vs ThriveCart.

ThriveCart puts A/B testing on its Standard plan and lets you compare checkout layouts, offers and flows side by side, so a test can include the bump and upsell sequence along with the page. It suits a creator who wants checkout tests without moving the whole funnel to a new builder. Our ThriveCart review covers the plan structure.

ClickFunnels tests one funnel step at a time, checkout steps included, with two variations per test. Its feature page does not say whether the step keeps one public URL during a test, so plan your ad links around that before launch. Read the ClickFunnels review for the rest of the builder.

Checkout Champ is a direct-response order platform for high-volume sellers. A, B and C split tests are built into its order bumps and one-click upsells, and its CRM lists four-way split testing. Getting in means booking a demo, which slows down a seller who wants to try it this week. See the Checkout Champ review.

CartFlows is the option if your store already runs on WooCommerce. Pro splits any step of a flow, including the checkout layout, inside your own WordPress site. Anyone not on WordPress can skip it. Details in our CartFlows review.

Systeme.io bundles funnels, email and courses at a low entry cost, and it splits traffic between two versions of a page to compare headlines, designs or offers. That is enough for a first checkout test on a small list. Read our Systeme.io review for the trade-offs.

Stripe Checkout is a payment interface, and its product page does not mention any funnel or checkout split testing. Many sellers keep Stripe as the processor and put a funnel tool in front of it to handle the variants. Our Stripe review covers the payment side.

How to A/B test a checkout without junk data

1. Change one thing. Fields, bump or template, never all three at once, or you will not know which one moved revenue.
2. Hold the traffic steady. Same campaigns, same audiences and the same budget for the whole window. A new ad set mid-test changes who arrives.
3. Preview the rotation. On SamCart, open the checkout's preview link and refresh to see both versions come up.
4. Fix the sample size before launch. ElasticFunnels' FAQ warns against stopping early when one version pulls ahead, and SamCart recommends waiting for at least 100 visitors on a variation.
5. Re-check settings after you pick a winner. SamCart's Select Winner copies the layout, but subscription plans and Zapier rules do not carry over, so set those up again by hand.

My take

I'd start with the traffic source, because it settles the shortlist. If you buy on Meta or TikTok, I'd keep one checkout link in the ad and choose between ElasticFunnels, SamCart Pro and ThriveCart. If your buyers come from an email list, I'd skip the extra cost and run redirect tests in ClickFunnels or Systeme.io. Whichever you pick, I'd make bump placement the first test and judge it by revenue per visitor: it is the cheapest change to build and the easiest result to read. The carts that include the bump, and the plan that gates it, are in order bump software.

Your next step

Compare what your two finalists cost at your monthly revenue, then launch one checkout split test on the one that fits your traffic. More tools and calculators sit in the Best of hub.