18 Must-Have Tools to Plug Into Klaviyo for Higher Email ROI

1. Rebuy

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Overview:

Rebuy is a personalization engine that enhances eCommerce sales by delivering tailored product recommendations via email and SMS. By utilizing customer data, Rebuy helps brands create personalized shopping experiences, leading to increased customer engagement and revenue.

Key Features:

• Personalized Recommendations: Rebuy integrates with email and SMS campaigns to provide AI-driven product suggestions based on browsing and purchase history, boosting click-through rates and conversions.
• Smart Cart: Enhances the shopping cart experience with dynamic upselling and cross-selling, which can be extended to post-purchase communications through email and SMS.
• Automated Upsells and Cross-Sells: Automatically generates targeted upsell and cross-sell campaigns via email and SMS, encouraging repeat purchases and increasing average order value.
• Analytics and Reporting: Offers insights into the performance of product recommendations in email and SMS campaigns, helping businesses optimize their strategies.

Key Metrics Influenced:

• Average Order Value (AOV): By promoting relevant products, Rebuy can increase the average order value through effective upselling and cross-selling.
• Placed Order Rate: Targeted recommendations and personalized offers can lead to a higher placed order rate, as customers are more likely to purchase suggested products.
• Engagement Rate: Personalized product suggestions in email and SMS campaigns enhance customer engagement, increasing open and click-through rates.
• Repeat Purchase Rates: Automated campaigns featuring relevant product suggestions encourage customers to make additional purchases, boosting repeat purchase rates.

Who It's Best For:

Rebuy is ideal for eCommerce brands looking to enhance their email and SMS marketing with personalized recommendations and automated upselling. It's especially beneficial for businesses aiming to increase customer engagement and drive sales through targeted, data-driven marketing strategies.

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2. Okendo

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Overview:

Okendo is a customer review and user-generated content platform designed to help eCommerce brands build trust and credibility through authentic customer feedback. By integrating reviews, ratings, and photos into email and SMS campaigns, Okendo enhances customer engagement and drives conversions.

Key Features:

• Customer Reviews and Ratings: Collect and display detailed reviews and ratings, which can be featured in email and SMS marketing campaigns to build social proof and influence purchasing decisions.
• User-Generated Content (UGC): Showcase customer photos and videos in marketing messages, increasing authenticity and encouraging potential customers to engage with the brand.
• Loyalty and Rewards: Encourage customers to leave reviews and share their experiences by offering incentives, which can be communicated through email and SMS.
• Customization and Moderation: Customize review requests and display formats to align with brand aesthetics, while maintaining control over the content with moderation features.

Key Metrics Influenced:

• Engagement Rate: Featuring authentic reviews and UGC in email and SMS campaigns can boost engagement rates by providing relatable and trustworthy content.
• Conversion Rate: Social proof from positive reviews and ratings can significantly increase conversion rates, as customers are more likely to purchase when they see others' positive experiences.
• Repeat Purchase Rates: By encouraging reviews and rewarding customers, Okendo can help foster customer loyalty, leading to higher repeat purchase rates.
• Average Order Value (AOV): Highlighting customer testimonials about premium products or add-ons can encourage upsells, thereby increasing the AOV.

Who It's Best For:

Okendo is ideal for eCommerce brands looking to leverage customer feedback and UGC to build trust and authenticity. It's particularly useful for businesses aiming to enhance their email and SMS marketing campaigns with social proof and engage customers more effectively.

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3. Gorgias

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Overview:

Gorgias is a customer service platform specifically designed for eCommerce brands, offering a unified inbox for managing customer inquiries across multiple channels. By integrating with email and SMS marketing, Gorgias allows businesses to deliver personalized customer support, enhance engagement, and streamline communication.

Key Features:

• Unified Customer Support: Manage all customer interactions from a single dashboard, including those from email, SMS, chat, and social media. This centralization improves response times and ensures consistent communication.
• Personalized Responses: Leverage customer data to provide personalized responses, which can be integrated into email and SMS follow-ups, enhancing the customer experience.
• Automation and Macros: Automate responses to common inquiries and use macros for quick replies, freeing up time for more complex customer issues and improving efficiency.
• Customer Data Insights: Access detailed customer profiles and interaction histories, enabling more informed and personalized communication through email and SMS.

Key Metrics Influenced:

• Customer Satisfaction: By providing timely and personalized support, Gorgias helps increase customer satisfaction, which can be reflected in improved engagement and loyalty.
• Response Time: The platform's automation and unified inbox capabilities lead to faster response times, positively impacting customer perceptions and reducing churn.
• Engagement Rate: Integrating support responses and follow-ups with email and SMS campaigns can lead to higher engagement rates by addressing customer concerns proactively.
• Repeat Purchase Rates: Enhanced customer service and communication can lead to increased customer loyalty and higher repeat purchase rates.

Who It's Best For:

Gorgias is ideal for eCommerce brands seeking to improve their customer support efficiency and quality. It is particularly beneficial for businesses aiming to integrate their customer service with email and SMS marketing strategies, providing a seamless and personalized experience.

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4. Digioh

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Overview:

Digioh is a versatile platform designed to enhance lead capture and engagement through custom forms, surveys, and landing pages. It enables eCommerce brands to collect valuable customer data and use it to personalize email and SMS marketing campaigns, ultimately driving higher conversions and customer loyalty.

Key Features:

• Customizable Forms and Surveys: Create tailored forms and surveys to capture leads and customer insights, which can be seamlessly integrated into email and SMS marketing campaigns for targeted communication.
• Landing Pages: Build optimized landing pages that align with specific email and SMS campaigns, enhancing the user experience and boosting conversion rates.
• Conditional Logic: Use advanced logic to personalize questions and offers based on user responses, improving the relevance and effectiveness of marketing efforts.
• Data Syncing: Automatically sync collected data with CRM systems and email marketing platforms like Klaviyo, ensuring accurate and up-to-date customer information for personalized marketing.

Key Metrics Influenced:

• Engagement Rate: By incorporating customized forms and surveys into email and SMS campaigns, Digioh helps increase engagement rates through relevant and interactive content.
• Conversion Rate: Personalized landing pages and tailored marketing messages based on collected data enhance the conversion rate by delivering highly relevant offers.
• Average Order Value (AOV): The ability to promote specific products or offers through personalized communications can help increase AOV.
• Repeat Purchase Rates: Leveraging customer insights for personalized follow-up campaigns encourages repeat purchases, thus improving repeat purchase rates.

Who It's Best For:

Digioh is perfect for eCommerce brands looking to enhance their data collection and segmentation capabilities. It's especially useful for businesses aiming to create personalized email and SMS marketing campaigns that resonate with their audience and drive sales.

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5. Loop Subscriptions

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Overview:

Loop Subscriptions is a subscription management platform tailored for eCommerce brands, focusing on enhancing customer retention and lifetime value through streamlined subscription experiences. It integrates with email and SMS marketing to provide personalized communication, helping businesses manage subscriptions, automate renewals, and engage subscribers effectively.

Key Features:

• Subscription Management: Easily manage subscriptions, including sign-ups, renewals, and cancellations, through a user-friendly dashboard. This feature helps businesses maintain a clear overview of subscriber activity and preferences.
• Automated Communications: Set up automated email and SMS notifications for key events such as subscription renewals, billing updates, and personalized offers, keeping subscribers informed and engaged.
• Customer Portals: Provide customers with self-service portals where they can manage their subscriptions, update payment methods, and view order history, enhancing the user experience.
• Advanced Analytics: Access insights on subscriber behavior, churn rates, and revenue trends, allowing for data-driven decisions to optimize subscription offerings and marketing strategies.

Key Metrics Influenced:

• Engagement Rate: Automated notifications and personalized offers sent via email and SMS help maintain a high engagement rate by keeping subscribers informed and connected.
• Customer Retention: By providing a seamless subscription experience and proactive communication, Loop Subscriptions helps reduce churn and increase customer retention rates.
• Average Order Value (AOV): Personalized upsell opportunities and offers can be communicated through email and SMS, encouraging subscribers to increase their purchase value.
• Repeat Purchase Rates: The platform's ability to manage and automate renewals ensures consistent repeat purchases, boosting overall repeat purchase rates.

Who It's Best For:

Loop Subscriptions is ideal for eCommerce brands looking to build and maintain a strong subscriber base. It is particularly beneficial for businesses aiming to leverage email and SMS marketing to enhance subscriber engagement and retention, ultimately driving long-term growth.

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6. Littledata

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Overview:

Littledata is an analytics platform designed to enhance eCommerce tracking and reporting. It offers seamless data integration between Shopify, Google Analytics, and Klaviyo, enabling brands to gain deeper insights into customer behavior and optimize email and SMS marketing strategies based on accurate, real-time data.

Key Features:

• Accurate Data Tracking: Ensures precise tracking of eCommerce metrics, including transactions, customer journey, and marketing campaign performance, providing a solid data foundation for decision-making.
• Enhanced Customer Segmentation: Leverage detailed analytics to segment customers based on behavior, purchase history, and other metrics, allowing for highly targeted email and SMS marketing campaigns.
• Revenue Attribution: Track the performance of different marketing channels, including email and SMS, to understand their contribution to sales and customer acquisition, helping to optimize marketing spend.
• Subscription Analytics: Provides specific insights into subscription metrics, such as recurring revenue and churn rates, crucial for subscription-based eCommerce businesses.

Key Metrics Influenced:

• Engagement Rate: By utilizing data-driven insights to segment audiences and tailor content, Littledata helps improve the engagement rate of email and SMS campaigns.
• Conversion Rate: Accurate tracking and analytics enable the optimization of marketing strategies, leading to higher conversion rates.
• Customer Lifetime Value (CLV): Detailed customer analytics allow for the creation of personalized experiences, fostering customer loyalty and increasing CLV.
• Repeat Purchase Rates: Insights into customer behavior and purchase patterns support targeted re-engagement campaigns, enhancing repeat purchase rates.

Who It's Best For:

Littledata is perfect for eCommerce brands looking to refine their data tracking and analytics capabilities. It's particularly useful for businesses that want to optimize their email and SMS marketing strategies based on comprehensive customer and transaction data.

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7. Social Snowball

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Overview:

Social Snowball is an affiliate and referral marketing platform designed to help eCommerce brands leverage their customers and followers as brand advocates. It simplifies the process of setting up and managing affiliate programs, enabling businesses to boost sales through word-of-mouth marketing. The platform seamlessly integrates with email and SMS marketing strategies to recruit affiliates, distribute referral links, and track performance.

Key Features:

• Affiliate Program Management: Easily create and manage affiliate programs, offering incentives to customers who refer new buyers. Affiliates receive unique referral links that can be shared via email, SMS, or social media.
• Referral Rewards: Customize reward structures for both affiliates and referred customers, encouraging participation and increasing the reach of marketing efforts.
• Automated Onboarding: Streamline the affiliate recruitment process with automated emails and SMS invitations, making it easy for customers to join the program and start promoting.
• Performance Tracking: Monitor the success of affiliate campaigns with detailed analytics, tracking key metrics such as sales generated, conversion rates, and top-performing affiliates.

Key Metrics Influenced:

• Customer Acquisition Cost (CAC): By leveraging existing customers as affiliates, Social Snowball can help reduce CAC compared to traditional paid marketing channels.
• Sales Growth: Incentivized referral programs can drive significant sales growth as satisfied customers and followers promote products to their networks.
• Engagement Rate: Automated email and SMS campaigns for recruiting and updating affiliates keep them engaged and informed, fostering a sense of community and motivation.
• Repeat Purchase Rates: Encouraging affiliates to share referral links for ongoing promotions can lead to increased repeat purchase rates, as existing customers continue to engage with the brand.

Who It's Best For:

Social Snowball is ideal for eCommerce brands looking to expand their reach through affiliate and referral marketing. It is particularly beneficial for businesses aiming to integrate these strategies with email and SMS marketing to maximize engagement and sales.

Notable Customers or Case Studies:

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8. Tapcart

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Overview:

Tapcart is a mobile app builder designed for Shopify stores, enabling eCommerce brands to create custom mobile apps without coding. By integrating with email and SMS marketing, Tapcart enhances the mobile shopping experience, driving engagement and sales through personalized push notifications and in-app messaging.

Key Features:

• No-Code Mobile App Builder: Create a fully branded mobile app for your Shopify store with a drag-and-drop interface, making it easy to offer a seamless mobile shopping experience.
• Push Notifications: Send personalized push notifications directly to users' smartphones, complementing email and SMS marketing efforts to engage customers with promotions, new arrivals, and special offers.
• In-App Messaging: Utilize in-app messaging to communicate with users, providing targeted promotions and updates that can increase engagement and drive sales.
• Real-Time Sync: Automatically sync products, collections, and promotions between the Shopify store and the mobile app, ensuring consistency across all sales channels.

Key Metrics Influenced:

• Engagement Rate: The use of push notifications and in-app messaging keeps customers engaged with the brand, leading to higher interaction rates compared to traditional email and SMS.
• Conversion Rate: A seamless and optimized mobile shopping experience, combined with targeted messaging, can significantly improve conversion rates.
• Average Order Value (AOV): Personalized notifications and in-app offers can encourage upsells and cross-sells, increasing the average order value.
• Repeat Purchase Rates: By maintaining direct communication with customers through a branded app, Tapcart helps foster loyalty and repeat purchases, boosting repeat purchase rates.

Who It's Best For:

Tapcart is ideal for eCommerce brands looking to expand their reach through a dedicated mobile app. It's particularly useful for businesses aiming to integrate push notifications and in-app messaging with their email and SMS marketing strategies to enhance customer engagement and drive sales.

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9. Wonderment

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Overview:

Wonderment is a customer experience platform focused on improving post-purchase communication for eCommerce brands. It provides detailed shipping and delivery tracking, helping brands keep customers informed and engaged through email and SMS updates. This tool is particularly valuable for enhancing transparency and building trust with customers.

Key Features:

• Order Tracking Pages: Customizable tracking pages that align with the brand's aesthetics, allowing customers to monitor their orders. These pages can be linked in email and SMS notifications to provide a seamless experience.
• Proactive Notifications: Automate email and SMS updates to inform customers of their order status, including shipping updates, delays, and delivery confirmations. This proactive communication reduces customer inquiries and enhances satisfaction.
• Analytics and Insights: Offers insights into shipping performance and customer engagement with notifications, helping brands optimize their post-purchase communication strategy.

Key Metrics Influenced:

• Engagement Rate: Timely and informative updates via email and SMS keep customers engaged, increasing interaction rates and building a positive post-purchase experience.
• Customer Satisfaction: By providing transparent and consistent order tracking information, Wonderment helps improve customer satisfaction, which can lead to positive reviews and referrals.
• Repeat Purchase Rates: Enhanced post-purchase communication fosters trust and loyalty, encouraging repeat purchases and boosting overall customer lifetime value.

Who It's Best For:

Wonderment is ideal for eCommerce brands that prioritize clear and consistent communication with customers after a purchase. It is especially beneficial for businesses looking to integrate their shipping updates with email and SMS marketing to enhance the overall customer experience.

10. PostPilot

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Overview:

PostPilot is a direct mail automation platform that enables eCommerce brands to send personalized postcards and letters to their customers. It integrates seamlessly with Klaviyo, allowing businesses to complement their digital marketing strategies with physical mail. This multichannel approach helps enhance customer engagement and retention through targeted, offline communication.

Key Features:

• Automated Direct Mail Campaigns: Easily set up automated postcard and letter campaigns triggered by customer behaviors, such as purchases, birthdays, or cart abandonments, using data from Klaviyo.
• Personalization: Customize each piece of mail with personalized messages, offers, and branding, enhancing the relevance and impact of the communication.
• Segmentation and Targeting: Leverage Klaviyo's customer segmentation capabilities to target specific audiences with tailored direct mail campaigns, ensuring the right message reaches the right customers.
• Tracking and Analytics: Monitor the effectiveness of direct mail campaigns alongside email and SMS efforts, with detailed analytics on delivery, response rates, and ROI.

Key Metrics Influenced:

• Engagement Rate: By integrating direct mail with email and SMS marketing, PostPilot helps increase overall engagement rates, offering a tangible touchpoint that complements digital interactions.
• Conversion Rate: Personalized and timely direct mail can boost conversion rates by providing an additional channel to reach and persuade customers.
• Customer Lifetime Value (CLV): Strategic direct mail campaigns, such as reactivation letters or loyalty rewards, can enhance customer loyalty and increase CLV.
• Repeat Purchase Rates: Sending personalized offers and reminders via direct mail encourages repeat purchases, complementing digital marketing efforts.

Who It's Best For:

PostPilot is perfect for eCommerce brands looking to enhance their digital marketing strategies with direct mail. It is particularly useful for businesses that want to create a cohesive multichannel experience, leveraging both online and offline marketing to engage customers and drive sales.

11. HiTide

Convert your Instagram followers to SMS Subscribers using automated DMs.

How it’s used with your ESP:

You can use klaviyo subscribe links and hand it over to HiTide app to run campaigns for collecting SMS subscribers from the Instagram profile. It will reply automatically to DMs to those customers who are interested in subscribing and handle the consent there. Huge friction remover and makes it easy to grow list proactively.

Key Insight:

Most brands are ignoring that Instagram is one of the places their subscribers are really active. Using a platform like HiTide makes it easy to utilize that estate area and convert into SMS subscribers. ROI is great here. We are expecting more brands to be active in this area in the near future. Currently it’s not actively done.

12. Fondue 

Fondue has emerged as the leading cashback promotions platform, garnering significant attention since its launch. The platform enables brands to create sophisticated cashback campaigns that drive both immediate sales and long-term customer loyalty.

How it's used with your ESP: 

Fondue's seamless integration with Klaviyo allows brands to automate cashback-related communications, track promotion performance, and trigger targeted follow-up campaigns based on customer engagement with cashback offers.

Key Insight: 

Most brands don’t test cashback offers because its hard to do it technically but this tool solves that and you can quickly spin up a flow to test it against your current offer. It might actually beat your current one.

13. Gatsby

Gatsby has innovated in the social-to-subscriber conversion space by creating a seamless bridge between Instagram engagement and email/SMS marketing. The platform transforms organic social interactions into valuable first-party data collection opportunities, making it particularly effective for brands aiming to accelerate their list growth before key shopping periods like BFCM.

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How it's used with your ESP: 

Gatsby integrates with leading ESPs including Klaviyo, Attentive, and Yotpo to create a powerful multi-channel communication ecosystem. The platform enables brands to:

• Convert Instagram giveaway participants into email and SMS subscribers through automated DM workflows
• Create trigger-based flows when customers generate UGC or follow the brand
• Synchronize Instagram engagement data with ESP segments for targeted messaging
• Manage and automate ambassador program communications
• Track and attribute sales from Instagram engagement to measure campaign effectiveness

Key Insight: 

Similar to HiTide this is a similar platform that provides you powers to collect the SMS consent via instagram DMs. This is a very robust experience and customers don’t mind sending a DM to subscribe. It gets less friction and helps in generating more subscribers which ultimately leads to more customers. On a monthly basis you can run campaigns there to have a SMS growth goal from Instagram and have your retention agency give you updates on that.

14. Amped 

Amped stands out as the premier solution for on-site conversion optimization through sophisticated popup experiences. Their advanced targeting capabilities and design flexibility make them unmatched in the space.

How it's used with your ESP: 

Popups are notorious for being limited in nature. Amped changes that as it has almost every kind of targeting and design needs you will have. It has integration with all major ESPs and helps in increasing conversion rates of popups.

Key Insight: 

If your current popups are not performing well after lots of testing and you are feeling limited in what you can do with your current provider then Amped might be a good bet for you. They got acquired by MailChimp but it’s not a deal breaker as the integration works smoothly. 

15. KnoCommerce

KnoCommerce has positioned itself as a game-changing post-purchase survey platform, helping brands uncover crucial attribution insights and customer behavior patterns. The platform stands out for its ability to achieve exceptional response rates (averaging 45%+) and deliver actionable zero-party data through sophisticated survey logic and engagement tools.

How it's used with your ESP: 

You can pass back the survey results as custom properties in klaviyo and use them in segmentation to be hyper specific and improve results. Getting those survey results and feeding back to inform email strategy is one of the high leverage things you can do.

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Key Insight: 

Zero party and first party data both are heavily underutilized. Brands are still not pushing boundaries high enough to leverage them in retention space. Knocommerce helps in collecting the data and feeding back to the strategist to improve the overall performance. Paid teams are already doing it but retention teams are lacking here. This should change.

16. Lifetimely 

LifeTimely provides deep cohort analysis capabilities, helping brands understand customer lifetime value and retention patterns with unprecedented clarity.

How it's used with your ESP: 

The platform's insights can be used to create highly targeted segments within your ESP for customized retention campaigns based on cohort performance and most importantly figuring out when and where to send targeted messaging.

Key Insight: 

What most marketers do is they assume stuff. “Oh lets trigger a winback 60 days after purchase because we do that for all brands”. But what’s missing is that each brand is different. So use lifetimely to get into the weeds of when a customer is really churned and trigger messages according to that. Timing makes the most difference than a lot of other factors.

17. Hiro Analytics

Hiro has established itself as the go-to solution for enhanced Klaviyo reporting, providing deeper insights into email marketing performance and customer behavior.

How it's used with your ESP: 

Direct integration with Klaviyo enables advanced reporting capabilities and actionable insights for optimization of email campaigns and flows.

Key Insight: 

Reporting is one of the most tedious tasks that marketers have to do after all of the hard work from strategy to execution and it also takes a good chunk of time. Hiro solves that and smoothly integrates with klaviyo and gives you a nice dashboard where you can see the data and insights from them. A LOT more than your default klaviyo templates.

18. ReviewsIO 

ReviewsIO stands out in the review management space with their robust platform and comprehensive integration capabilities.

How it's used with your ESP: 

The platform enables automated review collection emails, segmentation based on review sentiment, and targeted campaigns based on customer feedback.

Key Insight: 

Most review emails are generic as they use static images that never change. ReviewsIO change that as it integrates REALLY well with almost all ESPs and allows you to collect, display reviews well in the emails and make them dynamic and more engaging. One cool example is showing dynamic reviews in checkout flow to boost authority or collecting reviews by timely messaging them after delivery.

FAQ

Which ESP add-on supports advanced event tracking?

‍Littledata — it enhances native Shopify revenue tracking by capturing granular add-to-cart and checkout event data that most ESPs don't pick up natively.

What's the best tool for granular link tracking and subscriber analytics alongside Klaviyo?

‍Hiro Analytics — it layers enhanced reporting and insights on top of Klaviyo's native analytics.

What tools help collect zero-party data and post-purchase feedback?

‍Digioh for on-site quizzes that collect zero-party data, and KnoCommerce for post-purchase surveys — KnoCommerce alone averages 45%+ response rates.

Concluding thoughts

• Selecting the right tools for email and SMS marketing is essential for eCommerce brands to boost engagement and sales.
• These tools offer features like personalized recommendations, subscription management, and direct mail automation.
• Key benefits include improving conversion rates, average order value, and repeat purchase rates.
• Integrating these platforms creates a cohesive multichannel experience that enhances customer loyalty.
• Using these tools effectively helps businesses grow and thrive in a competitive market.

Read: 4 Klaviyo Reports to Track in Your eCommerce Strategy