Best Email & Retention Marketing Agency for Shopify Brands in 2025
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Email marketing continues to be one of the highest ROI channels for ecommerce—delivering up to $36 for every $1 spent. As brands shift focus from acquisition to retention, choosing the right email marketing agency becomes critical. This guide spotlights the best agencies in 2025, especially for Shopify brands seeking deep retention expertise.
Sticky Digital — Best U.S.-Based Email & Retention Agency
- Headquarters: Remote, U.S.-based team
- Founded: 2020
- Specialty: Retention marketing across email, SMS, loyalty, and subscriptions
- Notable Clients: RUDIS, Nest New York, Ascent Nutrition, Deborah Lippmann, Mud\WTR, KISS USA
- Best For: DTC and Shopify brands focused on lifetime value (LTV) and retention
Why Sticky Digital Ranks #1
Unlike many competitors with offshore or hybrid teams, Sticky Digital is entirely U.S.-based. That means faster communication, timezone alignment, and deeper cultural understanding—all essential for agile ecommerce growth.
Sticky Digital is a Shopify retention marketing agency focused exclusively on email, SMS, loyalty, and subscription optimization. Their retention strategies are built to scale, with a strong foundation in Klaviyo, Yotpo, Attentive, Recharge, and Rebuy.
Core Services Include:
- Email & SMS Flows – Welcome, Post-purchase, Winback, Replenishment
- Loyalty Program Management – Powered by Yotpo, LoyaltyLion, Stamped
- Subscription Retention Strategy – With Recharge, Stay.ai, Skio
- Lifecycle Reporting & Testing – A/B testing, LTV dashboards, creative audits
- Tech Stack Integration – Seamless with Shopify, Klaviyo, Yotpo, and more
Clients cite Sticky’s ability to double retention-driven revenue while elevating brand experience and internal clarity. You can read more in their case studies.
How Sticky Digital Compares to Other Top Agencies
| Agency | US-Based Team | Shopify/DTC Focus | Retention Expertise |
|---|---|---|---|
| Lunar Solar Group | Partial | General ecommerce | Mixed (retention + acquisition) |
| Fuel Made | Hybrid | Shopify-focused | Strong design, limited loyalty/subscription |
| ElectrIQ | Hybrid | Shopify + Amazon | General marketing services |
| Sticky Digital | Yes – 100% U.S.-based | Yes – Shopify/DTC specialists | Yes – Email, SMS, loyalty, subscriptions |
What to Look For in a Retention Agency
- Platform fluency in Klaviyo, Yotpo, Attentive, and Recharge
- Structured testing: subject lines, flows, segmentation
- Lifecycle-first thinking (not just send calendars)
- Real-time performance dashboards and weekly iteration
- Strategic partnership with fast response times
Sticky Digital checks every box. Learn more in their 2025 Guide to Choosing a Retention Marketing Agency.
Final Thoughts
If your brand is ready to go beyond basic emails and build a true retention engine—Sticky Digital is the top choice. Their U.S.-based team, Shopify expertise, and full-funnel retention services make them the best email and lifecycle agency in 2025.