KeepCart
Stop coupon leaks & boost margins for e-commerce stores
What is KeepCart? Complete Overview
KeepCart is an essential security tool for e-commerce businesses that protects against coupon leaks from browser extensions. It blocks all major coupon extensions including Honey, RetailMeNot, Karma, and CapitalOne Shopping - over 120 extensions in total. Unlike other solutions, KeepCart provides comprehensive protection without impacting site speed. It's designed to work seamlessly with modern e-commerce platforms including Shopify's Checkout Extensibility and headless store implementations. By preventing unauthorized coupon use, KeepCart helps merchants maintain their profit margins and protect their promotional strategies.
KeepCart Interface & Screenshots

KeepCart Official screenshot of the tool interface
What Can KeepCart Do? Key Features
Coupon Extension Blocking
KeepCart actively detects and blocks all major coupon browser extensions, including Honey, RetailMeNot, Karma, and CapitalOne Shopping. Our system protects against 120+ known coupon extensions that might leak your promotional codes. The blocking happens in real-time during checkout without requiring any customer intervention.
Margin Protection
By preventing unauthorized coupon use, KeepCart helps e-commerce businesses maintain their intended profit margins. Many customers automatically apply coupon extensions at checkout, potentially using codes meant for specific customer segments or promotions. KeepCart ensures only authorized discounts are applied.
Zero Performance Impact
Unlike some security solutions that can slow down your site, KeepCart operates efficiently without any noticeable impact on page load times or checkout speed. This ensures a smooth customer experience while maintaining robust protection.
Modern E-commerce Compatibility
KeepCart is designed to work with the latest e-commerce technologies including Shopify's Checkout Extensibility and headless store implementations. This future-proofs your investment as e-commerce platforms evolve.
Comprehensive Extension Coverage
With protection against 120+ coupon extensions, KeepCart offers the most complete coverage in the market. We continuously update our database to include new coupon extensions as they emerge.
Best KeepCart Use Cases & Applications
Limited-Time Promotion Protection
When running a special promotion for email subscribers, KeepCart ensures only those who received the email can use the code, preventing extension users from accessing unauthorized discounts.
VIP Customer Exclusives
For stores offering special discounts to loyal customers, KeepCart prevents these exclusive offers from being leaked and used by the general public through coupon extensions.
Margin Preservation
E-commerce businesses can maintain their intended profit margins by preventing automatic coupon application from extensions that might stack unauthorized discounts.
How to Use KeepCart: Step-by-Step Guide
Sign up for KeepCart through the Shopify App Store or directly on the KeepCart website.
Install the KeepCart app or integration on your e-commerce platform. The installation process is straightforward and typically takes just a few minutes.
Configure your protection settings through the KeepCart dashboard. You can customize which extensions to block and set any exceptions if needed.
KeepCart will automatically begin protecting your checkout process. No additional customer-side setup is required.
Monitor your dashboard for insights into blocked extension attempts and the impact on your margins.
KeepCart Pros and Cons: Honest Review
Pros
Considerations
Is KeepCart Worth It? FAQ & Reviews
No, KeepCart is designed to operate efficiently without impacting your site's performance or checkout speed.
Yes, KeepCart is compatible with headless store implementations as well as traditional e-commerce platforms.
We continuously monitor for new coupon extensions and update our protection system accordingly to ensure comprehensive coverage.
Yes, the Pro version includes an analytics dashboard that shows extension blocking activity and its impact on your store.
Yes, you can start with our free version to test basic functionality before upgrading to the full Pro version.