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Retention Side Agency Logo

Retention Side

Retention marketing that goes beyond Sales emails
https://retentionside.com/
Location

San Francisco, United States

Employees

11-50

Retention Side Agency Hero Image

Overview

Retention Side approaches eCommerce retention as a system, not a stream of campaigns or discount sends. Every engagement starts with foundational research into the brand, its customers, and the current retention landscape, surfacing behavioral patterns and revenue gaps before any execution begins. From there, optimization workshops translate insights into prioritized fixes ranked by impact rather than preference, and the resulting strategy is built around measurable outcomes such as returning customer rate, LTV, average order value, and units per transaction. Each change moves through a controlled A/B framework that isolates variables and validates before scaling, with continuous behavioral data analysis used to refine flows as customer behavior shifts. Email, SMS, push notifications, direct mail, and loyalty programs run as one connected retention layer rather than five disconnected channels, and the team operates as an extension of the in-house marketing function with daily Slack communication, a shared Notion client portal, and weekly reviews that keep work visible end to end.

Services

Email Marketing is the agency’s core service line. Engagements typically begin with mapping customer journey and understanding unit economics to back up every strategic idea with data. SMS Marketing extends the email program into a paired channel for promotional sends, cart abandonments, and post-purchase touchpoints. Other retention channels like Loyalty program, Direct mail, Whatsap/Viber marketing are used to maximize LTV of each customer and enhance word of mouth marketing.

Industries

Health and beauty is the agency’s most documented vertical and has a dedicated Email Marketing for Beauty Brands landing page covering skincare, cosmetics, and personal care, where retention work tends to revolve around education-led flows for ingredient-heavy SKUs and replenishment cadence for consumables. Fashion and apparel runs as the second focal area with its own Klaviyo for Fashion Brands page, where retention programs commonly address sizing communication, return rate reduction, and seasonal drop planning across catalogs with short product lifecycles. Food and beverage rounds out the top three with retention work focused on cross-category buyer expansion, replenishment frequency, and inbox placement for the higher send volumes that consumables and alcohol categories typically require.

Top Case Studies

Retention Side agency case study for Hedonism Wines
Retention Side agency case study for Eliya the Label

FAQ

What retention metrics does Retention Side actually optimize for?
The agency reports against lead to customer rate, returning customer rate, average order value, units per transaction, and customer lifetime value rather than treating opens, clicks as the primary scorecard. Open and click data still feed deliverability and creative decisions, but they sit underneath the compounding metrics in the Notion Client Portal that gets reviewed weekly.
The agency reports against lead to customer rate, returning customer rate, average order value, units per transaction, and customer lifetime value rather than treating opens, clicks as the primary scorecard. Open and click data still feed deliverability and creative decisions, but they sit underneath the compounding metrics in the Notion Client Portal that gets reviewed weekly.
The agency reports against lead to customer rate, returning customer rate, average order value, units per transaction, and customer lifetime value rather than treating opens, clicks as the primary scorecard. Open and click data still feed deliverability and creative decisions, but they sit underneath the compounding metrics in the Notion Client Portal that gets reviewed weekly.
Deliverability and list reactivation are common entry points rather than disqualifiers. Most accounts in this state start with diagnostics on sender reputation, DKIM/SPF/DMARC setup, suppression rules, and inbox placement testing before any new send volume is added. They wrote the full guide about 2026 deliverability requirements on their website.
Usually, the first tangible results come after week two. Bigger improvements that impact overall revenue typically come between month two and month three. Full maximization is expected within the first 6 months.
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