Shopify volume discount apps compared

We make one of these apps, so read this knowing that. What follows is what we found when we installed the others on a real store and went through their dashboards — including the things they do better than we do. Pricing and features below were verified on 2026-08-15; app pricing changes without notice, so check the App Store listing before you decide anything on the strength of a number here.

The thing nobody compares: where the free plan stops

Every app in this category has a free plan, and almost every free plan has an ending written into it. The ending is the real difference between them, and it is usually a line in the billing page rather than anything on the listing.

There are four different ways these apps decide you should start paying, and they are not variations on a theme — they behave completely differently as your store grows.

Capped by lifetime sales generated

Pumper Bundles gives a free plan and counts the extra sales its offers generate. At roughly $300 of extra sales, lifetime, that allowance is spent and you move to a paid plan ($9.99/mo up to ~$1,000 extra sales, $29.99/mo up to ~$5,000).

It is not a revenue share — Pumper does not take a percentage of your sales — but the free plan expires by succeeding. If the app works, the free plan ends. Lifetime means it never resets.

Capped by monthly offer revenue

Upsell Koala works the same way with a different clock: the allowance we saw was $1,000 of offer revenue per month, resetting at the start of the next month. Kinder than a lifetime cap — a quiet month gives you the allowance back — but the same principle. The better it works, the sooner you pay.

Capped by catalogue size

Discounty prices by how many variants you discount at once, from ten up to unlimited, rather than by money earned. This is genuinely different and, depending on your store, better: a high-revenue store with a narrow range pays little, and your bill does not rise because a campaign worked. A large catalogue pays more regardless of results.

Capped by features

Moon Bundles puts a set of features behind Premium and leaves usage alone. The most predictable model of the four: you know on day one what you will pay, and it does not move.

Capped by rule count

TierUp, ours, is free up to 10 pricing rules with no cap on orders, revenue or time, and a flat $9.99/month above that. We chose a rule count because it is the one axis that does not punish you for the app working — but it is still a cap, and a store that wants tiers on forty products hits it on day one. See our pricing page.

Where each one is genuinely stronger

Reading only the section above would leave you with the impression that pricing model is all that separates these apps. It is not, and on features we are the narrowest of the five.

Pumper and Moon are full bundle suites. Buy X get Y, free gifts, mix-and-match, build-a-box, tier images, badges. If you want bundles as well as quantity breaks, they do both and we do one.

Moon Bundles ships its App Store listing in many languages and has the best in-editor tooling we saw — template gallery with usage counts, live preview with locale context. We noted at the time that we should offer that. We still do not.

Upsell Koala has the targeting model we liked most, and a modular storefront with several placeable blocks where we ship one.

Pumper ships charm-price rounding (prices landing on .99) which, at the time of writing, is on our roadmap and not in our free tier.

Discounty has the clearest onboarding — a short wizard that maps your answers to a plan, rather than dropping you into an empty dashboard.

What we would not tell you without checking

There is one question that matters more than any feature list: does the app apply its pricing through Shopify Functions, or by rewriting the cart as a draft order? Draft-order apps commonly break accelerated checkout and analytics attribution.

We do not know which approach the other four use. We did not verify it, so we will not imply it. TierUp uses Functions, and that is a claim about us, not about them. Ask any vendor directly — the answer is a single sentence and it is the most useful sentence you will get from a sales conversation. How to tell the difference explains what to look for yourself.

How to actually choose

If you want bundles and cross-sell as well as quantity breaks, pick a bundle suite. We do not do those things and are not planning to.

If your catalogue is large, check the variant-count and rule-count models carefully — that is where a large catalogue gets expensive, in different ways.

If you expect the app to work, look hard at any cap measured in sales generated. A cap on results is the one that arrives exactly when you are happiest.

If you want the bill to be predictable, a flat fee or a feature gate does that; a usage cap does not.