Your next sale is already in your database.

Most Shopify brands spend 80% of their budget acquiring customers. The fastest-growing ones spend as much retaining them. This whitepaper shows how Klaviyo, Shopify Flow, and Rebuy create a compounding retention advantage and how to deploy all three before Q4.

No winback flows means 70% of first-time buyers never return.

No winback flows means 70% of first-time buyers never return.

Every month without replenishment automation, a competitor fills the gap.

Every month without replenishment automation, a competitor fills the gap.

The revenue is in your post-purchase journey

Batch emails convert at 1/6th the rate of triggered post-purchase flows.

Batch emails convert at 1/6th the rate of triggered post-purchase flows.

Acquisition costs 5× more than retention. Most brands ignore this daily.

Acquisition costs 5× more than retention. Most brands ignore this daily.

WHY RETENTION

Your store already has the data

Klaviyo, Shopify Flow, and Rebuy connect to your order history and build an automated retention engine. No extra data sources. No new CRM. Just flows that run while your team focuses on growth.

Security

Updates

Hosting

Support

Checkout

Day-30 Winback Flow

Recover 8–12% of lapsed customers automatically with a Klaviyo trigger on day 30 — personalised, no manual send required.

Security

Updates

Hosting

Support

Checkout

Day-30 Winback Flow

Recover 8–12% of lapsed customers automatically with a Klaviyo trigger on day 30 — personalised, no manual send required.

Security

Updates

Hosting

Support

Checkout

Day-30 Winback Flow

Recover 8–12% of lapsed customers automatically with a Klaviyo trigger on day 30 — personalised, no manual send required.

Post-Purchase Cross-Sell

Shopify Flow tags the buyer. Klaviyo fires a Rebuy-powered cross-sell on day 7. First-send conversion: 12–18%.

Post-Purchase Cross-Sell

Shopify Flow tags the buyer. Klaviyo fires a Rebuy-powered cross-sell on day 7. First-send conversion: 12–18%.

Post-Purchase Cross-Sell

Shopify Flow tags the buyer. Klaviyo fires a Rebuy-powered cross-sell on day 7. First-send conversion: 12–18%.

Sale banner

Free shipping bar

Holiday theme

Replenishment Automation

Consumables have a predictable cycle. Send nothing by day 25 and a competitor goes first. This flow runs off order data alone.

Sale banner

Free shipping bar

Holiday theme

Replenishment Automation

Consumables have a predictable cycle. Send nothing by day 25 and a competitor goes first. This flow runs off order data alone.

Sale banner

Free shipping bar

Holiday theme

Replenishment Automation

Consumables have a predictable cycle. Send nothing by day 25 and a competitor goes first. This flow runs off order data alone.

VIP Threshold Tagging

3 orders or €500 LTV triggers VIP status in Flow. Klaviyo shifts them to early access and exclusive offers automatically.

VIP Threshold Tagging

3 orders or €500 LTV triggers VIP status in Flow. Klaviyo shifts them to early access and exclusive offers automatically.

VIP Threshold Tagging

3 orders or €500 LTV triggers VIP status in Flow. Klaviyo shifts them to early access and exclusive offers automatically.

Rebuy Personalisation

GuruNanda ran 22.8% of total orders through Rebuy, lifted AOV by 15.29%, and hit 3.3× cart upsell vs. their prior tool.

THE NUMBERS

0

1

2

3

4

Audit

We analyze your current Magento setup, identify risks, and map all your data, integrations, and customizations before we touch anything.

Why leading Shopify brands are winning on retention

Acquisition costs 5× more than retention. Yet most Shopify brands run zero automated post-purchase flows. Klaviyo triggered emails convert 6× higher than broadcast. The gap is already measurable and it compounds every quarter.

AOV lift from post-purchase flows (GuruNanda × Rebuy)

AOV lift from post-purchase flows (GuruNanda × Rebuy)

AOV lift from post-purchase flows (GuruNanda × Rebuy)

15.29%

Higher implementation costs

Higher implementation costs

Higher implementation costs

42%

faster site speed on shopify

faster site speed on shopify

faster site speed on shopify

2x

Higher checkout conversion

Higher checkout conversion

Higher checkout conversion

+5%

The data does not lie

The data does not lie

Up to 60% lower total cost of ownership

No developer needed for store updates

2x faster average page load speed

Built-in conversion optimization tools

24/7 support included in your plan

Seamless third-party app integrations

Scales automatically with your growth

Magento

$15K–$50K/year in hosting and dev costs

Every update requires developer time

Slow page speeds hurt conversions

Manual scaling causes downtime

No included support — pay per fix

Complex integrations break easily

Maintenance consumes your team

Up to 60% lower total cost of ownership

No developer needed for store updates

2x faster average page load speed

Built-in conversion optimization tools

24/7 support included in your plan

Seamless third-party app integrations

Scales automatically with your growth

Magento

$15K–$50K/year in hosting and dev costs

Every update requires developer time

Slow page speeds hurt conversions

Manual scaling causes downtime

No included support — pay per fix

Complex integrations break easily

Maintenance consumes your team

WHAT'S INSIDE

Inside the playbook

01

The Retention Gap

02

Klaviyo + Flow + Rebuy

03

Three Flows That Convert

04

By the Numbers

05

Your Retention Roadmap

THE BOTTOM LINE

Start compounding retention now

Your Shopify store already has the order data. Flatline maps exactly which flows to build first and sets them up in Klaviyo, Flow, and Rebuy. Download the whitepaper and book your 30-minute retention audit.