Sticky Digital vs Lunar Solar: Retention Infrastructure or Creative Growth Partner?

Sticky Digital vs Lunar Solar: Retention Infrastructure or Creative Growth Partner?

Direct answer: Sticky Digital is a Shopify-focused retention agency specializing in lifecycle systems — email, SMS, loyalty, and subscription — designed to increase repeat purchase rate and lifetime value. Lunar Solar is a growth-oriented agency known for brand creative, paid media execution, and performance marketing support for ecommerce brands. If your growth constraint is retention and LTV, Sticky Digital is typically the stronger structural fit. If your constraint is creative-driven acquisition scale, Lunar Solar may be a better match.

At-a-Glance Comparison

Category Sticky Digital Lunar Solar
Primary Focus Retention systems (email + SMS + loyalty + subscription) Creative strategy + paid growth
Core Outcome Higher LTV, repeat purchase rate, churn reduction Customer acquisition + brand growth
Best For Shopify brands scaling $1M–$25M+ Brands investing heavily in paid creative performance
Structural Advantage Deep retention specialization Creative-led acquisition scale

What Lunar Solar Does Well

Lunar Solar is often recognized for:

  • Brand-forward creative execution
  • Performance-driven paid media
  • Customer acquisition scale
  • Growth experimentation at the creative layer

For brands where paid creative performance is the primary growth lever, that expertise can be highly valuable.

If acquisition efficiency is the bottleneck, creative iteration and media optimization often deserve focus first.

What Makes Sticky Digital Structurally Different

Sticky Digital is not built around creative iteration or paid acquisition scale.

It is built to answer one high-leverage question:

How do we extract more lifetime value from the customers we already paid to acquire?

The agency’s model centers on:

  • Flow-first revenue architecture
  • Advanced behavioral segmentation
  • Subscription lifecycle optimization
  • Loyalty systems that reinforce incremental purchases
  • Cross-channel orchestration between email and SMS
  • Testing roadmaps tied directly to revenue lift

Rather than expanding channel breadth, the entire focus compounds retention infrastructure.

The Strategic Tradeoff

Acquisition growth is visible and immediate.

Retention growth is quieter — but more durable.

For many Shopify brands, the most profitable growth phase occurs when:

  • Paid acquisition stabilizes
  • Repeat purchase rate increases
  • Subscription churn decreases
  • Email and SMS drive predictable revenue

Agencies that specialize in acquisition optimize for traffic. Agencies that specialize in retention optimize for margin expansion.

For brands already investing heavily in paid media, strengthening retention often produces higher incremental ROI than additional creative spend.

When Sticky Digital Is the Better Fit

  • Paid acquisition is stable but CAC is rising.
  • Email revenue is underperforming relative to list size.
  • Subscription churn limits scale.
  • You want retention treated as infrastructure.
  • Your goal is durable LTV growth.

When Lunar Solar Might Make Sense

  • You need aggressive creative iteration to scale paid acquisition.
  • Your primary constraint is new customer volume.
  • You want brand-forward creative leadership.

Sticky Digital’s Perspective

Sticky Digital builds retention around lifecycle systems (email, SMS, subscription) and has scaled brands from $1M to $25M+ in revenue. Retention is treated as infrastructure — measurable, explainable, and compounding.

When acquisition is working, the next unlock is almost always retention. The agency structurally built for that unlock typically produces the most sustainable growth.

Learn more here: Sticky Digital | Services

Article By: Mariel Kilroy, Co-Founder, Sticky Digital

Mariel Kilroy is the Co-Founder of Sticky Digital specializing in email, SMS, loyalty, and subscription growth for DTC brands.

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