Know Which Discount Codes Are Worth It
Stop paying customers to do what they'd do for free.
Promonaut runs controlled experiments on your Shopify discount codes. Scale the ones driving real sales. Cut the ones giving away margin.
83% of discount code users would have purchased without the code. The other 17%? That's the promo earning its keep.
The Blind Spot
You can see who used your code. You can't see who needed it.
92% of consumers use discount codes. Your email platform says "this campaign generated $12,000 in revenue." But how much of that would have happened without the code? Shopify tells you 500 people redeemed SUMMER20. It doesn't tell you how many would have bought at full price.
Meanwhile, the pressure keeps building. Ad costs are up 20-30% since 2021, pushing more merchants toward discount-based acquisition. The influencer economy runs on unique codes. Browser extensions have trained customers to expect a code at every checkout. You're running more promotions than ever, but measurement hasn't moved at all.
of revenue spent on promotions
spent figuring out which ones to cut
The Hidden Split
Four types of customer are using your codes. Only one needs them.
Every promotion reaches all four types. Without measurement, you can't tell which is which, so you discount everyone equally.
Persuadables
Only buy because of the discount. These are your genuinely incremental customers, the ones making the code worth running.
Sure Things
Would have bought at full price. The code just handed them a discount they didn't need. This is pure margin waste.
Lost Causes
Won't buy regardless of the discount. The code reaches them but doesn't move them. No harm, no help.
Sleeping Dogs
Would have bought, but the discount actually puts them off. It signals desperation or cheapens the brand. Rare, but real.
Promonaut's experiments separate the Persuadables from the Sure Things. That's how you stop discounting customers who would have paid full price — and double down on the ones who actually need the nudge.
How It Works
From install to action in three steps
Find your worst-performing promos
Install Promonaut and get your Promo Health Report in 60 seconds. It grades every discount you've run — which ones earned their keep and which ones wasted margin. Free, no commitment.
to first insight
Choose your experiment
Pick the right test for the question you're asking. Share the Smart Link in your campaigns. Promonaut handles assignment automatically.
Standard: Does your code drive extra sales? Discount vs no discount.
Head-to-Head: Which discount works harder? Compare two codes side by side.
Mystery Reveal: Does discounting matter at all? Revealed code vs no code.
Connect your Klaviyo account to sync experiment groups as segments, or use the Smart Link with any platform.
to early signal
Get a verdict: keep, adjust, or cut
Every experiment ends with a clear recommendation. Promos that work? Scale them with confidence. Promos that don't? Cut them and save the margin. No dashboards to interpret — just decisions to make.
accounted for
What You Get
Everything you need to make better promo decisions
Actionable Recommendations
Every experiment gets a written summary that explains the results in clear language: what happened, what it means, and what to do next. No dashboards to interpret. Your WELCOME15 code earned $12,400 at $3.20 per extra order. Keep it running.
Your WELCOME15 discount earned $12,400 in extra revenue at $3.20 per extra order. This promotion is earning its keep.
Tells You Exactly What to Change
When a promo is earning, Promonaut says keep it running. When the cost is too high, it suggests specific alternatives. Reduce from 25% to 16% to bring cost per extra order below your threshold. When it’s not working at all, it tells you to pause and shows you the savings. Every outcome comes with a next step.
Reduce depth to bring your cost per extra order below $50
Discount spend at risk: $4,287 – $5,988
Three Ways to Test
Standard measures whether a code drives extra sales: discount vs no discount. Head-to-Head compares two codes to find the optimal discount level. Mystery Reveal isolates whether discounting itself matters. The control group gets no code at all. Each type gets its own results view and recommendations.
Native Klaviyo Integration
Connect your Klaviyo account and Promonaut syncs experiment groups as Klaviyo segments automatically. Target your discount group and control group directly in Klaviyo campaigns. No CSV exports, no manual list management. Your experiment stays clean and your workflow stays in Klaviyo.
Segments synced automatically. Last synced 2 minutes ago.
Know the Real Cost of Each Extra Sale
Compare what each additional sale from your promotions actually costs against your customer acquisition cost. If your cost per extra sale is $3.20 and your CAC is $18, that promotion is four times more efficient than paid ads. That’s a promo worth scaling.
Act Before the Experiment Ends
Get probability estimates within 3-5 days. "72% chance this promo is driving extra orders" — well before traditional A/B test timelines. Decide sooner, move faster.
Every dollar accounted for. What your promos earn and what they waste.
Opportunity
Incremental Revenue
Sales that wouldn't have happened without the promotion.
Risk
Discount Spend at Risk
Discounts given to customers who would have bought anyway.
Net Promotional Value
This promotion is earning its keep.
Know exactly what each promotion earns and what it wastes. When the numbers are green, scale with confidence. When they're red, cut before it adds up.
Built for Shopify merchants who run promotions.
Promonaut is for merchants with 500+ orders/month running regular discount campaigns via email, SMS, influencers, or ads.
Fashion & apparel: only 60-70% of inventory sells at full price. The rest gets discounted. Are those markdowns driving sales or just eroding margin?
Beauty & cosmetics: influencer codes are your #1 attribution tool, but attribution isn't incrementality. Which creators actually drive new customers?
Health & supplements: podcast codes and subscribe-and-save discounts everywhere. Are they acquiring or just subsidising?
Home goods & lifestyle: high shipping costs mean free-shipping promos hit margins hard. Make sure they're actually converting.
What it's not
- Not a pricing optimization tool
- Not a discount code manager
- Not an enterprise-only solution
Start free. Upgrade when you're ready.
Enterprise brands pay six figures for this kind of promotional intelligence. You shouldn't have to.
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21-day free trialNo credit card required. Trial extends if your experiment is still running.
Are your promotions earning their keep?
Find out in 60 seconds. Install Promonaut and get your Promo Health Report for free. No trial, no credit card. When you find a code worth testing, your 21-day Pro trial is waiting.