Best Checkout Apps for Klaviyo

Find and compare the best Checkout apps for Klaviyo in 2026

Use the comparison tool below to compare the top Checkout apps for Klaviyo on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

  • 1
    Upsell.com Reviews

    Upsell.com

    Upsell.com

    $7.99/month
    Upsell.com is a powerful Shopify upsell application built to help ecommerce businesses maximize their revenue through post-purchase optimization. It enables merchants to offer one-click upsells after checkout, allowing customers to add products without re-entering payment details. The platform also provides a customizable thank you page where businesses can display personalized offers, surveys, and cross-sell opportunities. With a drag-and-drop funnel builder, users can easily create and manage upsell campaigns without technical expertise. Upsell.com integrates with Shopify and other marketing tools, ensuring a smooth and connected workflow. It includes advanced features such as A/B testing, audience segmentation, and detailed analytics to improve performance. The app supports businesses of all sizes, from small startups to large-scale operations. Its automation capabilities allow merchants to generate additional revenue with minimal manual work. Real-time insights help users refine their strategies and increase conversions. The platform is designed for ease of use, making it accessible to marketers and store owners alike. Ultimately, Upsell.com helps businesses boost order value and improve customer engagement.
  • 2
    Rebuy Reviews

    Rebuy

    Rebuy Engine

    $4.49 per month
    Leading global brands leverage Rebuy's personalization platform to enhance data-driven shopping experiences, attract new customers, retain existing ones, and drive growth. Tailor unique shopping journeys for every customer by utilizing your store's past shopping data. Boost average order value (AOV) with AI-driven upselling and cross-selling strategies applied at crucial decision-making moments—from the homepage to the thank you page and further. Streamline processes and improve retention with convenient one-click subscription reactivation emails and automated follow-up messages after purchases. Enhance conversions and AOV through shareable links that lead customers to pre-filled carts and checkouts with automatically applied discounts. Merchants on Shopify Plus utilize Rebuy's script editor for crafting dynamic checkout upsells that enhance AOV and improve profit margins. Monitor the impact of Rebuy on your store's growth effortlessly, allowing you to easily identify top-performing widgets and make necessary adjustments to optimize performance. This comprehensive approach ensures that brands not only attract customers but also foster long-lasting relationships with them.
  • 3
    Mollie Reviews

    Mollie

    Mollie

    €0.25 per transaction
    Mollie is a money management platform that powers growth for over 250,000 businesses – from startups to enterprises. It's a single platform to get paid and simplify your finances, with online and in-person payments, subscriptions, financing, reconciliation, invoicing and fraud prevention tools. Here's how Mollie can help your business: – Accept online and in-person payments and manage everything on one platform. – Increase conversion with 35+ payment methods, including global leaders and local favourites. – Boost revenue and build trust with an optimised checkout flow built to convert. – Use an all-in-one dashboard to manage payments, get insights, access funding, and streamline accounting. – Get paid faster by sending payment requests and branded invoices in just a few clicks. – Access fast, flexible business funding up to 350k with transparent pricing and flexible repayments. Get started today with transparent pricing, no hidden fees, and no lock-in contract.
  • 4
    Checkout X Reviews

    Checkout X

    Checkout X

    €39 per month
    Checkout X presents a comprehensive e-commerce checkout solution that empowers online retailers to enhance their revenue by removing barriers and instilling confidence and security in shoppers, enabling them to swiftly finalize their purchases and enjoy a seamless transaction experience. This innovative platform significantly boosts retailers' profits by offering a more effective, mobile-optimized checkout process, smooth payment options, and the potential for post-purchase upsells, among other features. With Checkout X, customers can finalize their orders in just 25 seconds, compared to the industry standard of 66 seconds, demonstrating a remarkable efficiency. Furthermore, approximately 75% of retailers experience increased sales automatically by utilizing the benefits of post-purchase upsells. The system allows businesses to fully harness the capabilities of their payment service providers, providing customized integrations, a variety of payment choices, and essential tracking information. Additionally, Checkout X seamlessly integrates with vital services for conversion tracking, order fulfillment, cart recovery, and more, ensuring a streamlined operation for online merchants. By choosing Checkout X, businesses can revolutionize their checkout process and significantly improve overall customer satisfaction and retention.
  • 5
    ResponseCRM Reviews

    ResponseCRM

    ResponseCRM

    $0.06 per transaction
    Elevate every key performance indicator, from conversion rates to average order value and lifetime value. This solution is crafted for seasoned advertisers seeking a competitive advantage! We are proud to support some of the most successful brands online. Our commitment is to deliver innovative solutions that propel your business forward. With our headless commerce API, you can effortlessly expand your eCommerce shopping experiences across limitless channels. Embracing headless commerce represents the future of omnichannel retail. By decoupling your frontend from the backend, you can enhance your eCommerce systems and implement the agile methodologies needed for personalized shopping experiences anytime and anywhere. Effortlessly create compelling offers that not only enhance AOV but also foster brand loyalty and boost customer lifetime value. Additionally, our user-friendly features help minimize involuntary churn, ensuring customer satisfaction! We offer a comprehensive array of campaign optimization tools designed to keep customers engaged through enticing promotions, adaptable subscription options, one-click upsells during checkout, and opportunities for post-purchase upgrades and subscription enhancements. These capabilities empower brands to thrive in a highly competitive digital landscape.
  • 6
    Converge Reviews
    Converge aids e-commerce businesses in enhancing their advertising effectiveness and ensuring precise attribution through superior tracking methods. By utilizing server-side conversion tracking, your advertising platforms can effectively reach potential customers. Additionally, event enrichment guarantees that the events recorded on your website include the fullest range of parameters possible. Unlike traditional methods that rely on third-party pixels, the in-platform reporting offered through Converge provides accurate tracking data. Furthermore, this system allows for the monitoring of various transactions, including subscriptions, point-of-sale orders, upsell transactions, and more, extending beyond just website activities. It also features automatic tracking of all significant events, capturing even the distinct steps taken during the checkout process. This comprehensive approach helps businesses make informed decisions and optimize their marketing strategies effectively.
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