SmartEngine 2.0 upgrade on March 10 by Pareto
On March 10, 2026, your store will be upgraded to SmartEngine 2.0 – our faster, more intelligent discount engine built on Shopify’s latest Functions technology. This next-generation engine is designed to handle complex discount rules at scale, providing a more stable and high-performance experience for your customers.
SmartEngine 2.0: High-Performance Discounts Built for Scale
Experience the future of e-commerce discounting. SmartEngine 2.0 runs natively inside Shopify to process massive carts and high-traffic sales with zero lag. With new “Best Price” logic and automated discount stacking, your store will deliver the most accurate deals to every customer, every time.
What’s Improving with SmartEngine 2.0?
This upgrade replaces legacy methods with a system built for the modern Shopify ecosystem.
- Seamless Large Cart Handling: Processes checkouts with dozens or even hundreds of line items without slowing down the customer experience.
- Peak Performance Stability: Stay fast and stable during high-traffic sales events and busy marketing campaigns.
- Real-Time “Best Price” Logic: If a product qualifies for multiple rules, the engine automatically applies the one that gives the customer the highest discount.
- Built on Latest Technology: Built natively on Shopify Functions to replace legacy discount methods.
🔄 Important Change: Discount Stacking by Default
With the move to SmartEngine 2.0, discounts will now stack by default. This means your Pareto product rules will automatically combine with:
- Order Discounts and Shopify Admin codes (including percentage codes).
- Free gifts and Free shipping offers.
- Subscription discounts and third-party app discounts.
Note: The manual option to opt out of discount combinations via checkboxes will no longer be supported by default after the migration.
Before and After Comparison
| Feature | Before SmartEngine 2.0 | After SmartEngine 2.0 |
|---|---|---|
| Discount method | Legacy Shopify functions | Latest Shopify Functions |
| Large cart handling | May slow down | Handles seamlessly |
| Product discount logic | Priority-based (Variant first) | Best price wins |
| Discount stacking | Configurable (opt in/out) | On by default |
| Combination settings | Manually controlled | Automatic |
What You Need to Do
We want to make this transition as smooth as possible for your team. Here is how to prepare:
- Review Your Behavior: After March 10, take a moment to check your store’s discount behavior to ensure it aligns with your strategy.
- Strict Rule Requirements: If your store relies on strict priority or blocking rules, contact our 24/7 live chat before March 20th for a custom review.
- Keep Previous Rules: If you wish to maintain your previous Pareto rules exactly as they were, reach out via live chat.
- Expert Audit: If you are unsure how these changes affect your specific store, feel free to book a call with our team for a full rule audit.
Thank you for letting us be a part of your growth!