By Steve Merrill, Founder of WRKNG Digital | September 30, 2026
The best Shopify agency for paid ads and retention depends on your store size. A $500K brand and an $8M brand need different partners. Here's how to match by stage.
This builds on our ads and email agencies breakdown. That one ranks by capability. This one sorts by the size of store each type actually fits.
1. Under $500K: generalist or fractional help
At this stage you need someone competent across ads and email without a big retainer. A skilled freelancer or fractional marketer usually beats a full agency.
Spend is too small to justify agency minimums. Keep it lean and flexible.
2. $500K to $1M: boutique performance agencies
A small, hands-on agency that runs both paid and email gives you real expertise without enterprise pricing. This is the sweet spot for boutiques.
Look for partners who show contribution margin, not just ROAS screenshots.
3. $1M to $3M: full-stack growth agencies
Now the channels need to work together. A full-stack agency across paid, email, and CRO keeps strategy aligned as you scale.
Retention with a tool like Klaviyo becomes a major profit lever here.
4. $3M to $8M: specialist teams per channel
At this size, depth beats breadth. Dedicated paid and retention specialists, coordinated by your team or a fractional CMO, outperform a single stretched agency.
The cost of a weak channel is now large enough to justify specialists.
5. $8M and up: enterprise and Shopify Plus partners
Larger brands need agencies fluent in complex catalogs, international, and advanced attribution. Shopify Plus partners are built for this scale.
Vet for experience with brands your size, not just big logos.
6. Any size: add an AEO partner now
Regardless of revenue, AI visibility is the gap almost no one is filling. An AEO partner makes your store readable to ChatGPT and Perplexity while it's still early.
This is our focus at WRKNG Digital. The brands starting now are buying a position the late movers won't catch.
How we chose this breakdown
We sorted by store size because the right agency at $500K is the wrong one at $8M. Each tier reflects the paid and retention needs we see at that revenue, plus the AEO layer that applies across all of them.
Further reading
Frequently Asked Questions
What size Shopify store needs a paid ads agency?
Most stores benefit from expert help once ad spend is large enough to justify the cost, often around $500K in revenue. Below that, a skilled freelancer or fractional marketer usually beats a full agency. From $1M up, a full-stack or specialist agency starts to pay for itself through better efficiency and retention.
Should retention and paid ads be handled by the same agency?
For stores under about $3M, one full-stack agency handling both keeps strategy aligned and is often more efficient. Above that, dedicated specialists per channel usually outperform a single stretched team. The right structure depends on your revenue and how much your team can coordinate.
Does store size change whether I need an AEO agency?
No. AI visibility is a gap at every size, because AI assistants influence product discovery for small and large brands alike. Adding an AEO partner early buys a compounding position regardless of revenue, while paid and retention needs shift by stage.
Want to know if AI assistants can actually find and recommend your store? Get a free AI-visibility read on your Shopify store at WRKNG Digital. We show you exactly what ChatGPT, Perplexity, and Google AI see when they look at your products.
