Checkout blocks,
plus the offers that sell.
Shopify’s free Checkout Blocks app adds content, fields and rules to checkout, mostly on Shopify Plus. CheckoutOS includes checkout blocks and cart rules, and adds upsells, bundles, rewards at checkout and checkout chat.More than layout. Offers that grow orders.
Self-serve software or help with setup and migration.
Side by side
See exactly what you get with each one.
Who each one is best for. Choose Checkout Blocks if you are on Shopify Plus and want free, first-party checkout and thank-you page customization, with fields, rules and discounts, and don’t need upsells. Choose CheckoutOS if you want checkout offers, post-purchase upsells, bundles, checkout blocks and cart rules from one app for $99 a month, with no per-order fees.
Checked October 16, 2026. Checkout Blocks facts come from the Checkout Blocks App Store listing. “Not listed” means those pages didn’t name the feature when we checked, not that Checkout Blocks can’t do it.
| Feature | Checkout Blocks | Chargezen |
|---|---|---|
| Thank you and order status blocks Content on the confirmation pages | Included | Included |
| Checkout content and fields Blocks and custom fields in checkout | Shopify Plus | Included |
| Delivery and payment rules Hide, rename or reorder methods | Shopify Plus | Cart rules and validations |
| Post-purchase upsells One-click offers after checkout | Not listed | Included |
| Cart upsells Offers in the cart | Not listed | Included |
| Bundles Merge or split bundles | Not listed | Included |
| A/B testing Test different offers | Not listed | Included |
| Rewards at checkout Show points as customers buy | Not listed | Included |
| Price Monthly cost | Free | $99/month |
Checkout Blocks
- Thank you and order status blocks
- Included
- Checkout content and fields
- Shopify Plus
- Delivery and payment rules
- Shopify Plus
- Post-purchase upsells
- Not listed
- Cart upsells
- Not listed
- Bundles
- Not listed
- A/B testing
- Not listed
- Rewards at checkout
- Not listed
- Price
- Free
Chargezen
- Thank you and order status blocks
- Included
- Checkout content and fields
- Included
- Delivery and payment rules
- Cart rules and validations
- Post-purchase upsells
- Included
- Cart upsells
- Included
- Bundles
- Included
- A/B testing
- Included
- Rewards at checkout
- Included
- Price
- $99/month
What you’d really pay
Checkout Blocks is free. CheckoutOS is $99 a month and adds upsells, bundles and rewards.
Checkout Blocks
- Checkout Blocks
- Free
- Most checkout features
- Need Shopify Plus
- Without Plus
- Thank you and order status blocks, some rules
- Upsells and bundles
- Not listed
Estimated Annual Cost
$0/year
Free from Shopify. Full checkout content, custom fields, delivery and payment rules and custom discounts need Shopify Plus. Checkout Blocks App Store listing, checked October 16, 2026.
Chargezen
- CheckoutOS
- $99/mo
- Per-order fee
- $0
- Share of upsell revenue
- $0
Annual Cost
$1,188/year
CheckoutOS is $99/month, billed monthly, with no per-order fees. Pre-orders are included. Taxes are extra. Chargezen pricing.
Plan your move from Checkout Blocks
Check your data, billing dates and launch plan before you switch.
Talk through your move- 01
List your offers
Write down the Checkout Blocks offers, bundles and rules that perform best today.
- 02
Rebuild them in CheckoutOS
Create the same offers in the cart, checkout, post-purchase and thank-you page.
- 03
Test side by side
Use A/B tests to compare results before you switch everything over.
- 04
Turn off Checkout Blocks
Remove the old offers so customers only see one set.
Why brands switch to Chargezen
Unified Platform
Run AI agents, texts and email, upsells, creators and subscriptions from one place.
AI-Powered
AI agents answer customers, follow up and handle everyday busywork for your team.
Clear Pricing
See prices and usage costs, billed monthly or yearly.
Ready to switch from Checkout Blocks?
See the products, prices and setup help that fit your brand.
Common questions
Yes. Shopify’s Checkout Blocks app is free, and most checkout features need Shopify Plus (checked October 16, 2026). CheckoutOS is $99/month and adds upsells, bundles, rewards at checkout and checkout chat.
