By Steve Merrill, Founder of WRKNG Digital — October 22, 2026
What are the best Shopify agencies for ads and email, and how do you actually pick one?
The best Shopify ads and email agency for a $500K to $10M brand is the one that shows blended numbers, assigns a senior person to your account, and agrees to a short trial before any long contract. The name on the door matters less than how they staff, report, and get tested.
We already ranked the shops we trust. This post is the how. The method behind picking one.
I've sat on both sides of this. I built a clothing brand to about $10 million a year and spent $5 million of my own money on Facebook ads before I exited. I hired agencies. I fired agencies. Most of the pain came from questions I didn't ask up front.
So here are the questions.
Who actually runs my account every day?
This is the first question and most founders skip it. The person who sells you is rarely the person who logs into your ad account.
Ask for a name. Ask how many other accounts that person manages. Ask how many years they've run paid social or Google at your spend level.
Here's the bottom line: if a media buyer is juggling 15 accounts, yours gets an hour a week. At $100K a month in spend, an hour a week is how you light money on fire.
Good shops staff a senior strategist plus a buyer on accounts your size. Ask to meet both before you sign.
What does their reporting actually show?
Most stores fail this check.
Platform-reported ROAS is marketing fiction. Meta and Google both count conversions they take credit for, and both over-count. The number that pays your rent is blended: total revenue divided by total ad spend across every channel.
A real agency reports blended revenue, new-customer revenue, and contribution margin next to the platform numbers. They tie it back to your Shopify data, not just the ad dashboards.
Shopify's own research shows returning customers drive a huge share of revenue for growing brands, which is why email and SMS can't be an afterthought (Shopify, customer retention data). If an agency can't show you how much revenue email flows drive on their own, they're guessing.
Ask to see a real client report with the brand name blurred. If they only have a screenshot of ad-account ROAS, that tells you what they care about.
What are the red flags to walk away from?
A few kill the deal for me.
Guaranteed results. Nobody can promise a specific ROAS. We don't promise results, we promise what the team will actually do. Anyone guaranteeing a 4x is either lying or about to blame you when it slips.
A 12-month lock with no out clause. That contract protects them.
Vague answers on staffing. If they won't tell you who runs the account, it's because the answer embarrasses them.
One more. If they say "studies show" and can't name the study, they do that with your data too. The Baymard Institute puts average documented checkout abandonment around 70 percent, and a good partner can tell you exactly where yours leaks (Baymard Institute). Specifics beat slogans every time.
What does good reporting look like month to month?
Clear and boring. That's a compliment.
You want a weekly or biweekly number you can read in two minutes: spend, blended ROAS, new-customer count, email and SMS revenue, and what changed. Then a short note on what they're testing next and why.
The Data & Marketing Association has long found email returns strong revenue per dollar spent when the flows are built right (Data & Marketing Association). So your welcome flow, abandoned checkout, and post-purchase sequences should each have their own line in the report. If email is lumped into one bucket, they aren't managing it.
Data does not lie. It tells a specific story about where a business is stuck. Good reporting reads like that story.
How do I test an agency in the first 30 days?
Set the bar before they start. Not after.
Pick two or three goals for month one. Something like: a new-creative ramp plan shipped in week one, an audited rebuild of three core email flows, and a reporting rhythm you both agree on.
Then watch three things. How fast do they ship. How clearly do they explain tradeoffs when something doesn't work. And do they flag problems before you have to ask.
The ones worth keeping over-communicate in month one. The ones you'll fire go quiet.
If you want the shortlist of shops that pass this test, read our ranking of the best Shopify ads and email agencies. Use the questions here to vet whichever one you talk to.
Frequently asked questions
What should I ask a Shopify ads and email agency before signing?
Ask who runs your account day to day, how they report blended numbers next to platform numbers, whether the contract has a short out clause, and what they do in month one. If they dodge staffing or only show platform ROAS, keep looking.
How long should a Shopify agency contract be?
Start with 30 to 90 days and a 30-day out clause. A good agency earns a longer term by showing results. A year-long lock before they've proven anything protects them, not you.
What is a healthy ad spend to retainer ratio?
For a brand spending $50K to $300K a month, a fee around 7 to 15 percent of spend is common. Below that they're stretched across too many accounts. Well above that you're paying for overhead.
How do I test a Shopify agency in the first 30 days?
Set two or three clear goals before you start. A creative ramp plan, an audited email flow build, and a reporting cadence. Judge them on speed, how they explain tradeoffs, and whether they flag problems before you do.
Ready to vet us the same way?
We built WRKNG Digital to pass every one of these checks, including the AI-commerce side most agencies still ignore. See how we run ads, email, and agentic commerce for growing Shopify brands at our agentic commerce page.
Bring the questions above. Make us answer them.
