How to Build a Fast, Composable Loyalty Stack with Shopify Plus, Klaviyo, and Voucherify

Customer loyalty isn’t just a feel-good metric in ecommerce – it’s a critical growth lever. Returning customers spend 67% more than new customers, and even a modest 5% retention lift can increase profits by 25% to even 95%.

The takeaway is clear: keeping existing customers engaged pays off. The challenge is building a loyalty program that fits your business without locking you into rigid frameworks. Many Shopify Plus merchants know the promise, but the reality often falls short.

A composable approach beats monoliths. By integrating best-of-breed tools – Shopify, Klaviyo, and Voucherify – you can build a flexible loyalty system fast, without the usual headaches. In this guide, we’ll show you how to quickly assemble a loyalty tech stack using these tools. 

Meet the stack: Shopify Plus, Klaviyo, and Voucherify

Our stack of choice is: Shopify Plus as the ecommerce backbone, Klaviyo as the retention marketing engine, and Voucherify as the loyalty program brain. 

1. Shopify Plus

When it comes to building a Shopify loyalty program at enterprise scale, Shopify Plus is the foundation. It powers your storefront, checkout, and core order data – serving as the source of truth for customer accounts and purchases.

For brands on Shopify Plus, loyalty program integration is straightforward because Plus unlocks advanced APIs, webhooks, and automation tools like Shopify Flow. These capabilities make it easy to connect external platforms such as Voucherify and Klaviyo without custom monoliths or clunky plug-ins.

Here’s how it fits into a composable loyalty stack for Shopify Plus:

• Real-time loyalty tracking: Shopify APIs let Voucherify fetch transaction data instantly, awarding points or updating tiers the moment a purchase is completed.
• Customer retention automation in Shopify: Checkout events can flow directly into Klaviyo, triggering loyalty emails, SMS campaigns, or reward notifications.
• Headless flexibility: With headless components, you can embed loyalty balances or reward availability directly into your Shopify storefront or customer account pages, creating a coherent omnichannel experience.

2. Klaviyo

In any Shopify Plus loyalty program integration, Klaviyo acts as the engagement engine. It’s a customer engagement platform covering email, SMS, and push notifications, designed to turn Shopify order data and loyalty insights into personalized messaging that drives repeat purchases.

Think of Klaviyo as the communication hub of your loyalty stack. Its job is to keep loyalty members engaged – sending timely, exclusive updates, reward notifications, birthday offers, and reactivation campaigns.

Here’s how Klaviyo powers customer retention automation in Shopify:

• Behavior-based loyalty flows: Trigger emails or SMS when specific loyalty events occur. For example: “If a customer enters the VIP tier, send a thank-you email with a VIP-only discount.”
• Personalized rewards messaging: Use Voucherify’s real-time data sync to insert unique vouchers, points balances, or tier updates into Klaviyo emails automatically.
• Loyalty segmentation: Klaviyo’s segmentation goes deep. You can create micro-audiences like “customers with over 500 points who haven’t redeemed in 60 days” and nudge them with tailored offers.
• Omnichannel consistency: Whether customers interact with your brand through email, SMS, or push notifications, Klaviyo ensures loyalty communications feel unified and always up-to-date.

The result? Every loyalty event – earning points, redeeming a reward, unlocking a new tier – triggers the right communication at the right time. 

Learn more: How to Create a Customer Loyalty Program with Klaviyo?

3. Voucherify

If Shopify Plus is the data foundation and Klaviyo is the messenger, then Voucherify is the loyalty brain that runs the entire program. 

Voucherify is an API-first promotion and loyalty management platform that gives enterprise brands full control over loyalty logic. Unlike rigid plug-ins, it’s built for both developers and marketers, offering a robust API layer and a marketer-friendly dashboard.

Here’s what makes Voucherify Shopify integration and Klaviyo loyalty program integration so powerful in a composable stack:

• Fast setup: Voucherify integrates with Shopify Plus in days, not months.
• Flexible loyalty features: Go beyond basic points. Voucherify supports pending points, dynamic formulas for point accrual, tiered programs (Bronze/Silver/Gold), referrals, gift cards, and fully custom rules (e.g. double points for certain SKUs or reviews). You can personalize incentives at the level of product, geography, or customer trait.
• Enterprise scale: Companies report 70% faster campaign management after switching to Voucherify. Its cloud infrastructure supports millions of redemptions without slowing down Shopify checkout, making it reliable even for high-volume enterprise programs.

Benefits of going composable with loyalty (Shopify Plus + Klaviyo + Voucherify)

Why choose a composable loyalty stack instead of a plug-and-play loyalty app from the Shopify App Store? Here are the key benefits of building your loyalty system with Shopify Plus, Klaviyo, and Voucherify:

1. Faster time to market

Traditional loyalty software often requires long onboarding cycles and heavy customization. With a composable loyalty stack, you skip that bottleneck. Shopify Plus supplies the order and customer data, Voucherify connects loyalty logic through its API-first integration, and Klaviyo instantly puts that data to work in campaigns. 

Instead of waiting months for an all-in-one tool to catch up with your requirements, your team can launch, test, and refine loyalty programs at the pace your business demands.

2. Complete flexibility

With a composable approach, you can design any loyalty program rule, reward, or channel. 

• Voucherify supports tiered loyalty programs, referrals, dynamic point formulas, gift cards, and custom conditions (e.g. double points for certain SKUs or specific geographies).
• Shopify Plus ensures these campaigns tie directly into customer and order data.
• Klaviyo automates reward notifications across email, SMS, and push.

Learn more: Building Loyalty Programs in a Composable Architecture: A Practical Guide

3. Omnichannel orchestration

A Voucherify Shopify integration ensures loyalty programs work across every channel – online, in-store, mobile app, or POS. Voucherify keeps points and balances updated in real time, while Klaviyo loyalty automation ensures that redemptions or tier changes are reflected immediately in customer communications. For example, a customer who redeems points in-store will see the updated balance in their next Klaviyo email or SMS.

4. Real-time experimentation

Voucherify lets you run and adjust dozens – even hundreds – of campaigns in parallel. Brands like EasyJet have launched hundreds of loyalty and promotion campaigns without developer involvement. You can A/B test loyalty rewards, trial mechanics like “double points weekends,” and adjust instantly based on performance – something plug-and-play apps can’t match.

5. Enterprise-grade scale and security

This stack is built for enterprise. Shopify Plus manages high-traffic storefronts, Voucherify reliably handles millions of voucher redemptions and point transactions, and Klaviyo delivers personalized messages to segmented audiences at scale. Voucherify also includes safeguards such as fraud prevention rules, budget caps, approval workflows, and unlimited user seats – features critical for enterprise governance.

6. Lower total cost of ownership

A composable loyalty stack often costs less than all-in-one loyalty SaaS. Voucherify’s usage-based pricing has no per-member or per-campaign limits, avoiding the surprise fees common in plug-and-play apps. Programs launch faster, generate ROI sooner, and reduce engineering overhead since marketers can manage campaigns directly in Voucherify. 

Composable loyalty stack vs. Shopify loyalty apps

How the Shopify + Klaviyo + Voucherify loyalty stack works in practice

What does a Shopify Plus loyalty integration look like in the real world? Below is a practical, step-by-step scenario that combines welcome rewards, tiered loyalty points, and re-engagement campaigns – powered by Shopify, Klaviyo, and Voucherify.

1. Customer signs up on Shopify Plus

A new customer creates an account on your Shopify Plus store and opts into marketing. Shopify records their profile and purchase history (initially empty). Because the Voucherify Shopify integration is active, the customer is also created in Voucherify’s database under a unified ID – ensuring loyalty data is instantly tied to their account.

2. Welcome reward triggered via Klaviyo

The Shopify Klaviyo integration kicks off an automated welcome flow. Klaviyo requests a reward from Voucherify (or uses a pre-generated one) to deliver a personal $5 off voucher. Voucherify issues and validates the unique voucher code, which Klaviyo automatically inserts into the welcome email. The customer immediately receives a loyalty incentive as part of their onboarding experience.

3. Loyalty points earned on first purchase

When the voucher is redeemed at checkout, Voucherify validates it and Shopify processes the order. Through webhooks or Shopify Flow, the order event triggers Voucherify to award loyalty points (e.g. 10 points per $1 spent). If thresholds are reached, Voucherify automatically elevates the customer into a higher tiered loyalty program (e.g. Silver).

4. Real-time data sync across systems

Voucherify pushes updated loyalty data – points balance, tier, vouchers – back into Shopify (to display in the customer account page) and into Klaviyo’s loyalty program integration. Klaviyo profiles are enriched with properties like “Loyalty tier = Silver” or “Points balance = 500,” enabling precise segmentation and automated retention flows.

5. Reward redemption and omnichannel flexibility

Suppose the customer redeems 500 points for a $10 coupon. Voucherify generates and validates the reward code, which works online, in-store, or in a mobile app – thanks to Voucherify’s omnichannel loyalty program support. Fraud prevention rules ensure codes cannot be reused or shared. Redemption data is logged in Shopify orders and reflected instantly in both Voucherify and Klaviyo.

6. Automated re-engagement with Klaviyo

After 30 days of inactivity, Klaviyo detects the gap. Because it has synced Voucherify points and tier data, it triggers a re-engagement flow. For example: “We miss you – here’s 20% off plus bonus points on your next purchase.” The voucher is sourced from Voucherify’s API or pulled from a pre-synced set of codes.

7. Closing the loop and continuous optimization

The customer redeems the re-engagement voucher in Shopify, Voucherify updates loyalty balances, and Klaviyo tracks the campaign impact. Marketers see real-time insights in Voucherify’s dashboard (points awarded, rewards redeemed, active vouchers) and in Klaviyo’s engagement metrics. Underperforming campaigns can be adjusted on the fly in Voucherify or Klaviyo – without developer support.

How to create a Shopify loyalty program with Klaviyo and Voucherify (step-by-step)

Ready to build your loyalty program using Shopify, Klaviyo, and Voucherify? 

Here’s a high-level game plan to get you from zero to launch:

Step 1 – Connect Voucherify to your Shopify Plus store

Start by integrating Voucherify with Shopify Plus using either:

• A private app built in your Shopify admin to handle API credentials and permissions
• Voucherify’s native Shopify extension for streamlined setup and webhook configuration
• Direct integration using Shopify’s Admin and Storefront APIs, paired with Voucherify’s REST API and webhook support

Voucherify supports Shopify Plus checkout extensions, enabling reward redemption directly in the checkout flow. Once connected, Voucherify can:

• Read Shopify orders and customer profiles, including customer tags and metadata
• Apply loyalty rewards or discounts during the checkout process via Shopify Scripts or checkout extensions
• Track redemptions and customer interactions in real time using webhooks or API polling

The integration uses Shopify customer and order IDs, ensuring clean mapping between systems. Brands often accelerate setup using the open-source Loyalty App Accelerator or certified Voucherify partners.

Step 2 – Sync customer and order data in real time

Import existing customer lists and historical orders from Shopify into Voucherify. The sync uses Shopify’s native identifiers to ensure data continuity across systems.

To backfill historical data:

• Export customers and orders from Shopify using the Admin API or a reporting tool
• Map Shopify Customer IDs and Order IDs to Voucherify’s data model
• Use the Voucherify API or CSV import functionality to populate customer profiles and transaction history

Once historical data is in place, configure real-time syncing by:

• Setting up a Shopify webhook for orders/create to trigger a call to Voucherify’s API with the order payload
• Using Voucherify’s order.create or custom event endpoints to register purchases and allocate points
• Handling refunds, cancellations, and order edits by syncing orders/cancelled and orders/updated events

Live order data enables immediate loyalty point calculations and tier updates.

To display loyalty data in Shopify:

• Embed Voucherify widgets into customer account pages
• Or call Voucherify’s API to show dynamic values like point balance or tier level

Make sure guest checkouts are addressed appropriately, and all identifiers are consistently mapped across systems.

Step 3 – Design your loyalty program in Voucherify

With the plumbing in place, log into the Voucherify dashboard and configure your loyalty campaign. This includes: 

• Setting up earning rules (e.g. spend $1 = 10 points, certain products = extra points, points for social actions via API calls, etc.)
• Defining any tiers (levels like Bronze, Silver, Gold with their point thresholds and perks)
• Deciding on rewards/redemptions 

Voucherify lets you define all these with a lot of nuance – you can set point expiration policies, birthday rewards, referral bonuses, you name it. You’ll also configure the reward catalog: what can customers get with their points? (e.g. coupons, gift cards, free items, exclusive experiences). 

Essentially, this step is where you translate your marketing ideas into concrete rules in Voucherify. The nice part is you can do most of it in a no-code interface: e.g. create a points-for-purchase rule or a tier rule in a form, rather than coding from scratch. 

Take advantage of Voucherify’s flexibility here – customize the program to fit your brand. For example, if you run a VIP membership, you could set a rule that anyone who spends $1000 in a year is moved to a VIP tier and gets a free gift. Voucherify can handle that logic.

Step 4 – Connect Klaviyo for loyalty messaging

With your loyalty logic set up in Voucherify, the next step is to bring that data into Klaviyo for automated, personalized loyalty communication. Voucherify provides a native integration where you can select Klaviyo as a distribution channel for loyalty events.

In practice, you’ll set up API credentials between Voucherify and Klaviyo to enable secure data exchange. Once connected, configure the following data flows:

• Customer profile enrichment – Push loyalty properties (e.g. Loyalty Tier, Points Balance, Loyalty Card ID) to Klaviyo profiles when customers are created or updated in Voucherify.
• Event triggers – Send real-time events to Klaviyo when key loyalty actions occur, such as earning or redeeming points, changing tiers, or claiming and expiring rewards.
• Voucher distribution – Use Klaviyo flows to trigger API calls to Voucherify to fetch unique voucher codes, or push codes from Voucherify into Klaviyo for inclusion in messages.

For example, a Klaviyo flow triggered by a “Voucherify points balance updated” event could send an email like: “You earned points on your recent purchase.” The goal is for Klaviyo to stay in sync with Voucherify and respond to customer activity in real time.

Once configured, test a few scenarios: create a dummy customer, issue a test reward, and confirm that Klaviyo can pull loyalty data into an email. When you see a test contact in Klaviyo showing properties such as a loyalty card number or tier, the integration is working correctly.

Step 5 – Launch, monitor, and iterate

With integration complete and loyalty logic in place, roll out your program to customers. Announce it prominently on your site and use Klaviyo to send a launch campaign explaining how customers can earn and redeem rewards. Early communication is key to driving adoption, so highlight the value of joining the program at every touchpoint.

Once customers begin to enroll and engage, track performance in real time. The Voucherify dashboard gives visibility into new sign-ups, point accrual, and reward redemptions. Because the system is composable and API-first, you can make adjustments quickly as data comes in.

If redemptions are lower than expected, introduce lower-threshold rewards or send reminder campaigns through Klaviyo. If a specific reward proves too popular and impacts margins, adjust its point cost immediately without development delays. Experimentation is encouraged:

• Run A/B tests on loyalty-related emails in Klaviyo
• Segment campaigns for high-value tiers (e.g. exclusive offers for gold or VIP members)
• Launch limited-time bonus point events through Voucherify

Because Voucherify supports unlimited campaigns and users, these tests come without additional licensing costs. Over time, expand the program by enriching profiles with CRM or CDP data, introducing referral incentives, or adding gamification mechanics to sustain engagement.

Pro tip: Measure results consistently. Use Shopify and Klaviyo analytics to compare purchase frequency, average order value, and repeat purchase rates between loyalty members and non-members. Voucherify’s built-in reports track active members, redemption rates, and campaign performance.