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PackOS Checkout
- by PackOS
- From $50/month. Free trial available.
- by PackOS
- From $50/month. Free trial available.
Show accurate shipping rates at checkout by auto-selecting the right box size and getting live carrier rates from USPS, UPS, and FedEx.
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About the PackOS Checkout
PackOS solves inaccurate shipping rates at checkout by using bin-packing logic to select the correct box for every order. When box size is estimated wrong, merchants either overcharge customers and lose sales, or undercharge and lose margin. This app determines which box your order actually fits in, then queries live carrier rates from USPS, UPS, FedEx, and other carriers for that specific package.
Configure your box inventory once, set your carrier preferences, and PackOS handles everything automatically at checkout. The bin-packing engine recommends the right box for each order, while live rates ensure accurate shipping costs every time.
Launched: May 20, 2026
Key features
- Bin-packing engine selects the recommended box for each order automatically
- Live carrier rates from USPS, UPS, and FedEx returned at checkout
- Configurable box inventory, carrier settings, and shipping rules
Integrations with:
- Shopify Admin
Category:
Pricing of PackOS Checkout
Starter
$50 / month
or $540/year and save 10%
- 1,000 checkout rate calculations/mo
- Real-time rates at checkout
- Box size library
- Label purchasing
- 90-day margin history
- Email support
Basic
$105 / month
or $1,134/year and save 10%
- Everything in Starter
- 3,000 checkout rate calculations/mo
- 6-month margin history
- CSV import
Growth
$199 / month
or $2,149.20/year and save 10%
- Everything in Basic
- 8,000 checkout rate calculations/mo
- Automation rules
- 12-month margin history
- Priority email support
Pro
$399 / month
or $4,309.20/year and save 10%
- Everything in Growth
- 20,000 checkout rate calculations/mo
- Advanced automation rules
- Multiple ship-from locations
- Priority chat support
