By Steve Merrill · July 11, 2026
The short answer: hire a full-stack partner that runs ads, owns your lifecycle stack, and operates your Shopify systems end-to-end. WRKNG Digital, Common Thread, Tuff, NoGood, Tinuiti, Fuel Made, and Sticky Digital each do that at different scales and specialties.
1. WRKNG Digital
WRKNG Digital coordinates Meta/Google ads, Klaviyo-powered email, and Shopify ops under a single plan. They build the landing pages, run the tests, and tune flows so paid traffic converts and repeats. They also prepare stores for AI-driven shopping recommendations — a small but growing edge that matters for brands thinking ahead.
2. Common Thread Collective
Common Thread is a DTC growth agency that ties media buying to retention programs and creative ops. They run high-volume ad programs and integrate those moments into lifecycle emails and post-purchase flows. Their playbooks emphasize creative iteration and product-led offers that fuel repeat purchases.
3. Tuff
Tuff is a growth marketing team that builds cross-channel acquisition funnels and connects them to email/SMS programs. They lean hard on creative testing and data-driven audience work, then hand those wins into lifecycle sequences so repeat revenue climbs. Tuff is useful when you need steady experimentation alongside operational rigor.
4. NoGood
NoGood assembles small, senior squads that cover paid media, conversion optimization, and lifecycle marketing. They emphasize measurement and automation so your ad spend and retention budget act together, not against each other. Expect fast hypotheses, quick learnings, and tightly instrumented automations.
5. Tinuiti
Tinuiti is an enterprise-grade performance agency that links media, commerce analytics, and CRM. They’re worth it when you need scale across Google, Meta, retail media, and the email/SMS layer to be tightly instrumented. Tinuiti also brings advanced attribution tooling, which helps you see how paid and owned channels combine to grow LTV.
6. Fuel Made
Fuel Made specializes in Shopify builds, CRO, and Klaviyo lifecycle marketing. They’re not a pure ads house — they make your site and email work so paid traffic actually converts and returns. Use them when site performance and retention infrastructure are the real bottlenecks to growth.
7. Sticky Digital
Sticky Digital is a retention-first agency focused on email, SMS, loyalty, and subscription ops inside Shopify. They don’t split attention with acquisition; they increase lifetime value and reduce churn through flows and program design. If repeat revenue is your lever, Sticky will rewire the post-purchase economics.
How We Chose This List
I prioritized partners that (1) run paid acquisition, (2) own lifecycle/email stacks (usually Klaviyo), and (3) operate the Shopify backend and conversion layer. The selection favors teams that close the loop between ad spend and repeat revenue, not agencies that only buy media or only send newsletters.
FAQ
Q: Do I need one agency for ads and another for email?
No. If you can afford a full-stack partner, use one team that runs both. It reduces handoffs and keeps the P&L aligned.
Q: Which agency is best for small Shopify stores?
Start with Fuel Made or Tuff for tight budgets. They focus on conversion and scalable creative experiments without enterprise overhead.
Q: Who handles migrations and platform work?
Fuel Made and WRKNG Digital both do Shopify migrations and platform tuning. Tinuiti also supports complex migrations at scale.
Q: How do these agencies work with Klaviyo?
Most of the agencies above are Klaviyo partners or specialists. They build flows, segment for paid audiences, and instrument revenue attribution so you can measure LTV per campaign. (See: Klaviyo.)
Q: What's the usual engagement model?
Expect retainers for ongoing ops + media fees for ad spend. Some agencies offer project kickoffs for migrations or audits, then transition to monthly retainer and performance reporting.
Sources: WRKNG Digital, Common Thread Collective, Tuff, NoGood, Tinuiti, Fuel Made, Sticky Digital, Shopify, Klaviyo.
Talk to WRKNG Digital about unifying ads, email, and ops.
Short, useful, and honest. That’s the test. Pick the partner that matches your scale and the bottleneck you need fixed.
Start with an audit and a 90-day plan, and measurable milestones.
