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Turn Your Email List Into Predictable Revenue With Email & SMS Retention

InboxShuttle builds and manages email and SMS retention systems for ecommerce brands. Most brands we work with see retention become one of their top revenue channels within 90 days.

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Brands that trust us
Services

Email and SMS systems built to increase repeat revenue.

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Strategy & Planning
A clear 90-day plan.
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Email & SMS Design
On-brand. Built to convert.
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Flows & Automation
Revenue on autopilot.
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Campaign Management
Never miss a send.
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4.2k
1.8k
920
610
Segmentation
Right message, right list.
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+38%
▲ flow revenue
Reporting & Analytics
Revenue you can see.
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Inbox rate
98%
Deliverability
Land in the inbox.
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A
B
▲ Variant B +24%
A/B Testing & Optimization
Win more, every test.
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Who We Work With

Are you a fit? Flip the switch.

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You’ll thrive with us.
If these sound like you, retention could become one of your biggest revenue channels.
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You run an ecommerce brand and want email & SMS to drive more revenue.
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You know retention matters but haven’t had time to build it properly.
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You want a partner focused on LTV and repeat purchases, not just opens.
We’re probably not your match.
No hard feelings — we’d rather be honest than oversell.
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You want a quick one-off project. Retention is a system, not a sprint.
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You’re chasing the cheapest option instead of long-term return.
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You’re not ready to share ESP access so we can do the job properly.
Retention Calculator

What could retention be worth for a brand like yours?

Today $12,000/mo
Benchmark potential (25–35%) $37,500–$52,500/mo

Benchmark range, not a guarantee. Based on the 25–40% of revenue email & SMS drives for well-run ecommerce brands (industry data, Klaviyo). Where you actually land is what we map together on a strategy call.

Estimated annual opportunity
$300,000 – $450,000
A benchmark range for the gap between what email & SMS earns you today and what it could at industry-standard performance — not a promise of results.
See if it applies to you
Pricing

Strategic retainers for brands serious about retention.

Every plan includes full email and SMS lifecycle strategy, creative, and execution. No project fees. No surprises.

Foundation
$1,500 / month

For brands that need the retention fundamentals built properly.

  • 6–8 emails per month
  • Core lifecycle flows implemented (welcome, abandoned cart, post-purchase)
  • Foundational customer segmentation
  • Email copywriting and design
  • Monthly performance reporting
Capture repeat revenue your brand is currently leaving on the table after the first purchase.
Most Popular
Growth
$3,000 / month

For brands ready to turn email into a consistent revenue channel.

  • 10–12 emails per month
  • Everything in Foundation
  • Advanced lifecycle flows (browse abandonment, win-back, sunset)
  • Testing and campaign optimization
  • Segmentation based on purchase behavior
  • Bi-weekly strategy call
A lifecycle system that generates revenue between launches without relying on constant promotions.
Full Retention
$5,000 / month

For brands ready to scale retention across email and SMS.

  • 14–16 emails per month
  • Everything in Growth
  • Full lifecycle audit and rebuild if needed
  • Advanced behavioral segmentation
  • SMS integration and strategy
  • Weekly reporting and strategy call
Retention becomes a reliable growth channel driven by repeat customers and lifecycle automation.

All plans require a 3-month minimum commitment.

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Ready to turn retention into a real revenue channel?

If retention is becoming a priority and you want a structured system behind it, we can help.

Apply to work with us
Apply to Work With Us

Tell us about your brand. We’ll see if we’re a fit.

Tell us a bit about your brand and your current retention setup. If it looks like we can create meaningful impact, we’ll invite you to a 25-minute strategy call to walk through your retention opportunities.

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Takes about 2 minutes to complete
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We review every application personally
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Qualified brands get a 25-minute strategy call
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Response within 1 business day
We keep our client roster under 10 brands at a time. When we’re full, we’re full.

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We review every submission and respond within 1 business day.
We only take on brands where we believe we can create real impact.

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Application received.

We review every submission personally. If we think we’re a good fit, you’ll hear from us within 1 business day.