One rate, no table: 6% of the gross merchandise value (incl. taxes, excl. shipping) of extra orders demonstrably generated by our recommendations — last click, 7-day window. That applies to the Fair plan; on the Free plan, 100 recommendations per cycle are sent free, then sending pauses — there you can never be charged. Billing happens at the end of each Shopify billing cycle (30 days), as one line on your bill — orders cancelled or fully refunded by then are never billed. Before early access ends, we'll contact you with at least 14 days' notice.

No — and that's not a marketing promise; it's in the fee terms you approve at install: the rate can only ever decrease, never increase. The 6% is the same for everyone, there are no hidden tiers. And because the fee is a fixed share of the extra revenue, your bill can only grow if your extra revenue grows.

Fair question — and the honest answer: in early access we don't yet run a holdout test, so we can't prove pure incrementality; that comes after early access, when underperformance automatically credits your bill. What protects you today: we only charge when an extra carts email was the last click before the order, within 7 days, on a product we recommended — direct visits, other ads and your own newsletters take the credit instead. Anything we can't attribute cleanly is never billed — and on the Free plan, 100 recommendations per cycle show you real results and would-be charges before you switch to Fair.

No. For several reasons. First, we hard-limit it: at most one recommendation every 14 days per customer, never more than four in 90 days. Second, we pay for every email we send but only earn when it really brings extra purchases. That alone forces us to be relevant. And of course we only send to existing customers with valid marketing consent in Shopify.

Recommendations go only to existing customers and only for similar products — the UWG §7(3) similarity check runs before every single send, as does the check against your Shopify consent flags. Unsubscribing happens right from the email: a STOP reply is enough and takes effect immediately. If the legal basis for a recipient is unclear, nothing is sent. Germany is the early-access market; other countries are on the waitlist.

Yes. extra carts takes over exactly one moment: the recommendation after a purchase. Your newsletters and existing flows stay untouched, and our hard frequency cap ensures your customers don't get more mail overall. Further triggers — like abandoned carts — follow after early access.

For newsletters: absolutely — that's where your knowledge of your customers wins. The recommendation after a purchase is a different problem: which product, what delay, which subject line? Many dials — and on your own you have no comparison for any of them. extra carts tests subject-line variants from the very first email and compares them anonymously across all shops in a category; the comparison base grows with every new shop, and every improvement of the shared templates reaches everyone. Then there's the incentive: no subscription, no license — we only earn 6% of the extra revenue. The only way we can earn more is your recommendations getting better. And if you'd still rather optimize yourself: Free shows you, at no cost, what's hiding in your own co-purchase patterns.

Honest answer: below roughly 300 orders in 60 days, co-purchase patterns are too thin. Then we don't send, and we tell you so openly in the dashboard instead of shipping weak recommendations — activating automatically once the signal is strong enough. Early access fits stores from about €10,000 in monthly revenue.

We do — from our own authenticated sending domain (email.extracarts.net) with SPF, DKIM and DMARC; your shop gets its own sender address there (yourshop@email.extracarts.net). Your own domain and sender reputation are never touched. Your shop name appears as the sender, replies are forwarded to your support address — and anyone who wants no more recommendations simply replies STOP: it takes effect immediately and permanently.

Four — and all of them read-only: orders from the last 60 days, customers (consent state and email address only), products and product listings for the legally required similarity check. extra carts requests no write permissions. We never change your customers' consent — and a STOP reply goes onto our own suppression list without touching your Shopify data.

You see it before anyone else: every template is shown to you up front, and you approve the first batch yourself — nothing sends behind your back. What you can't do is rewrite the copy, and that's on purpose: no flow builder, no blank page, no weekend lost to email design. The template is pre-tested, conservative and compliance-checked, your shop name is the sender, and it only ever shows your products — so it stays on-brand and within UWG §7 with zero work from you. You keep control where it counts: switch tone (Sie/Du), exclude any product or category, mark pairs as 'never recommend together', tighten the frequency cap, or pause sending — anytime.

It only ever recommends your own products — and only ones that are in stock and genuinely similar to what the customer just bought; the similarity check runs before every send. You approve the first batch before anything goes out, and you can exclude any product or whole category, or mark pairs as 'never recommend together', anytime. During early access we also review every batch by hand to catch anything off.

No. Every shop's data stays isolated — your customers, your orders and your co-purchase patterns are used only to recommend your products to your customers, and are never exposed to another merchant. One thing we disclose before it does anything: every template ships with two to three subject-line variants that rotate randomly from the very first send. Which variant lands better is counted as anonymous statistics per product category across all shops — evaluated only once ten merchants and a thousand sends are reached, never using customer data, never traceable to your shop. That's how the shared templates improve without your data ever leaving your shop.

Your data stays isolated to your shop, encrypted at rest, and hosted in the EU. No other merchant sees it; inside extra carts access is least-privilege, and during early access a reviewer only looks at a batch to catch a bad send before it goes out. We're your data processor under a DPA signed at install — exactly two sub-processors are listed: Brevo (email delivery) and Hetzner (hosting, EU locations only); error monitoring runs on our own infrastructure. You get 30 days' notice of any change. Uninstall and we delete your customers' personal data within 48 hours. We earn a fixed share of the extra revenue — not your data.

Every attributed order has an evidence record: which email, which click, which timestamp, which order. Never billed: cancelled, refunded and test orders — and anything that can't be attributed cleanly. When in doubt: no charge. Everything exports as CSV.