Oak Post Purchase · Free Shopify app
More revenue from every order.
One-click upsells during checkout, right after payment, and on the thank-you page. Shoppers add to their order in a single tap. No new forms, no card re-entry.
We have a special offer for you
Grab this exclusive deal and add it to your order in just one click.

Field Journal — Cognac Leather
$32.00$36.00(SAVE 10%)
- Free to install
- Checkout · Post-purchase · Thank-you
- No order caps
The moment
There's a moment right after checkout. Most stores leave it empty.
The shopper has entered their card, pressed Pay, and is waiting for the confirmation page. They've already decided to buy from you. Oak shows one offer in that gap.
Checkout
The first place an offer can show, before the shopper pays. Accept, and it joins the cart in one tap.
The Oak offer
One product, one click. Accept, and it's added to the order they just placed.
Thank-you page
The confirmation page, updated with what they added. Oak can show one more offer here.
Checkout
Payment

Maris Marine Eye Cream
$28.16$32.00(SAVE 12%)
We have a special offer for you
Grab this exclusive deal and add it to your order in just one click.

Maris Hydrating Serum
$28.50$38.00(SAVE 25%)
Order summary

Maris Replenishing Moisturizer
$24.00$32.00(SAVE 25%)
How it works
The right offer for every shopper.
Build a funnel: a trigger, an offer, and where it shows. Oak finds the one that matches and shows it in one click.
Funnels run in priority order. The first one that matches wins. Everything else stays quiet.
Funnel 1 · Skincare buyers
- IFCart total ≥ $75 and collection is Skincare
- OFFER
Hydrating Serum, 15% off - SHOWS ONPost-purchase page
Pricing
No scaling tax.
Most upsell apps price by order count, or take a cut of the revenue they generate for you. Oak charges neither.
No order caps
Ten orders or ten thousand. Same app.
No upsell-revenue caps
When it works, you keep the upside.
No overage fees
Nothing per order, nothing per offer.
Free to install today. The structure above holds at any volume.
Free
to install · no caps
Everything a funnel can do
The whole toolbox.
Trigger the right shopper
- Cart total
- Subtotal
- Quantity
- Product count
- Specific products
- Excluded products
- Product tag
- Collection
- Always
AND within a group, OR across groups.
First match wins
- VIP buyers
- Skincare over $75
- Everyone else
Funnels run in priority order.
Four kinds of offer



Specific products, a collection, Shopify's pick, or more of what they just bought. Discounted or full price.
Three places
- Checkout
- Post-purchase
- Thank-you
Turn each on per funnel.
Your words
Every string the shopper reads is editable. No code.