PackOS vs Boxify

Your box library, and the live rate for the box it picks.

PackOS Checkout packs against your box library, and quotes live USPS, UPS and FedEx rates for the box it picked. With PackOS Labels, the order carries what that label actually cost. That is the margin loop. Shopify today — WooCommerce and other platforms coming soon.

Get PackOS Checkout See PackOS Checkout

14-day free trial on the plan you choose

This is a factual comparison and it says where Boxify wins.

The core difference

What each one is built to do

Boxify records the dimensions of your products and of your boxes, and works out how an order is packed — into more than one box where the order calls for it. Shopify merchants have relied on it that way for a long time, and for many catalogues it answers the packing question well.

PackOS Checkout packs against your box library too, and quotes live USPS, UPS and FedEx rates for the box it picked. So the comparison turns on what happens after the rate is quoted: with PackOS Labels, the order carries what that label actually cost. That is the margin loop. Shopify today — WooCommerce and other platforms coming soon.

Detailed feature comparison

A side-by-side look at what each platform offers. A checkmark where a capability is built in, and a note where the answer depends on your own setup.

Feature	PackOS	Boxify
Live carrier rates at checkoutLive carrier rates shown to the customer during checkout, without custom code	Built in	Built in
Box chosen from your own box libraryThe order is packed into one of the boxes you stock before a carrier is asked for a price	Built in	Built inBoxify packs against your boxes; see Boxify
Multi-box ordersAutomatically splits orders across multiple boxes when items do not fit in one	Built in	Built inBoxify can pack an order into several boxes; see Boxify
PO Box handlingWhat the checkout quotes when the shipping address is a PO Box	Built inUSPS services for PO Box addresses	See Boxify
Setup without a developerTime from install to live, accurate checkout rates	Built inNo developer, no theme code	Built in
Shipping margin per orderThe gap between what the customer paid and what the label cost	Built inAutomatic with both products	Depends on what your checkout collects

Boxify publishes what it supports, and its current plans, on its own Shopify App Store listing.

When Boxify is the better choice

Boxify is an established Shopify app for carrier-calculated rates. There are real situations where it is the right tool for the job.

You already run Boxify and its packing matches your boxesA checkout your customers already convert on is worth protecting. If the packages Boxify works out are the ones your team actually builds, and the rates you show match what your labels cost, staying is a reasonable answer — and this page is here for the day you want to compare the two.
You want the packing without a second rate sourceBoxify works the packing out and hands it to the carrier-calculated rates you already have configured in Shopify. Where that rate configuration is settled and you would rather keep it exactly where it is, that is the shorter path and it is a fair one.
Your team knows the setup it hasBox records and product dimensions that match how you really pack are real work that took real time, and fluency in the tool that holds them is worth something on its own.

When PackOS is the better choice

PackOS Checkout was built for Shopify merchants who want the rate their customer sees to match the box the order actually ships in.

Stores with varied product sizesIf your catalog includes items of different dimensions and orders often combine multiple products, bin-packing ensures the right box is selected for every order — and rates reflect actual shipping cost.
You want accurate checkout rates without codingPackOS Checkout uses bin-packing to determine the right box, then queries carriers with the actual dimensions and weight. Your customers see real rates at Shopify checkout — no development work, no API integration, no custom code.
Stores losing money on shippingIf you suspect shipping is a cost center but cannot prove it, PackOS margin analytics show exactly how much you make or lose on shipping for every order. No spreadsheets, no manual matching.

Switching

Moving from Boxify

Enter your real boxes in PackOS Checkout — inside dimensions and empty weight, the ones you actually pack in.
Let PackOS sync your product dimensions from Shopify, and fill in the products that still need them.
Switch the carrier service in your Shopify shipping settings once a test checkout reads the way you expect.
Nothing to cancel: PackOS Checkout bills through Shopify and the 14-day trial applies to the plan you choose.

Accurate rates. Real margin data. No code.

PackOS adds bin-packing, multi-carrier rates, and margin analytics to your Shopify checkout.

One order · Two numbers · One difference

Quoted at checkout

What the customer paid you to ship it

PackOS Checkout

Paid for the label

What the carrier charged you to move it

PackOS Labels

Margin

The difference, recorded on every order

Both products, on the same record

Run either product on its own. Run both and the same order carries both numbers.

FAQ

PackOS and Boxify, answered

How does PackOS Checkout know which box to quote?

You load your box library into PackOS Checkout — the same boxes you actually use to pack orders. When a customer checks out, PackOS runs a 3D bin-packing algorithm across the cart items and picks the optimal box. That box's dimensions are what gets sent to the carriers for the rate quote.

What if I don't have my product dimensions entered?

PackOS Checkout prompts you to add dimensions and weights for your top products during onboarding. The platform works best when your most-ordered products have accurate dimensions — but it handles missing data by falling back to sensible defaults until you fill them in.

Do I need PackOS Labels to use PackOS Checkout?

No. PackOS Checkout works standalone — you can keep buying labels wherever you buy them today. However, using PackOS Labels alongside Checkout means the rate your customer saw at checkout is the rate you pay for the label. No margin leak between quote and label.

What happens when an order needs more than one box?

If an order is too large for any single box, PackOS Checkout splits it across multiple packages and quotes the total accurately. No under-quoting on big orders.

Find out what shipping is really costing you.

PackOS Checkout quotes the real rate at your Shopify checkout. PackOS Labels buys discounted labels for any store and shows the margin on each one. Start with either.

Get PackOS Checkout See Checkout + Labels together

14-day free trial on every Checkout plan
Labels is free, always