Best E-commerce Agency: How to Choose One That Actually Grows Your Store

Most e-commerce brands do not have a traffic problem.

They have a profit problem disguised as a traffic problem.

The store gets visits. The ads get clicks. Amazon brings some orders. And at the end of the month, after ad spend, fees, shipping, returns and discounts, there is less money left than anyone expected.

That is why choosing an e-commerce agency is not about who promises the biggest ROAS. It is about who looks at the whole operation.

What a good e-commerce agency looks at first

Margin by product and channel. Selling more of a product that barely pays its own shipping is not growth. Offer and pricing. Bundles, thresholds for free shipping, first-order incentives. Conversion. Product pages, photos, reviews, checkout and site speed. Acquisition. Google Shopping, Meta, TikTok, and when marketplaces make sense. Retention. Email and SMS flows that turn first orders into repeat customers. Operations. Stock, fulfillment and customer service, because ads cannot fix a late delivery.

Five questions to ask any e-commerce agency

1. How will you measure success: revenue, or profit?

If the answer is only ROAS, ask how they account for product cost, fees and returns.

2. Which channel would you prioritize for my store, and why?

A serious agency explains the trade-off between your own store, Amazon, Walmart and TikTok Shop.

3. Who works on my account every week?

4. What do you need from my team?

Product data, photos, inventory and customer service capacity matter as much as ads.

5. What is not included?

Ad spend, photography, platform apps and marketplace fees add up fast.

How Ímpetus works with online brands

We run the growth engine of the store as one system: store optimization, paid ads on Google, Meta and TikTok, marketplace management where it makes sense, and email/SMS retention, guided by margin, not vanity metrics.

You get a weekly priority list, a monthly report with revenue, contribution margin by channel and next steps, and a team that knows your products.

What the US market charges

Agencies specialized in a single piece of e-commerce already cost more than that on their own. Amazon agencies charge $3,000 to $7,500 a month for mid-market management, according to SupplyKick, and email/SMS retention agencies start at $3,000 to $5,000 a month, according to Darkroom.

The Ímpetus offer

$2,490 a month

Store optimization, paid ads management, one marketplace channel and email/SMS retention flows, prioritized by margin.

About half of what a mid-market brand typically pays for the same scope split across specialists.

Ad spend, platform apps and marketplace fees are separate.

Why spots are limited

Each brand needs someone who understands its catalog and numbers. We only take on a limited number of new US brands each month.

Frequently asked questions

Which platforms do you work with?+

Shopify, WooCommerce, BigCommerce and other major platforms, plus Amazon, Walmart Marketplace and TikTok Shop.

Is ad spend included?+

No. Ad spend is paid directly to the platforms.

Do you charge a percentage of sales?+

No. This offer is a flat monthly fee.

Do you do product photography?+

We offer AI product photos as a separate service, priced per product.

How fast will I see results?+

Quick wins in conversion and retention flows often show up in the first weeks. Ads and marketplace growth usually take one to three months of testing.

What does it cost to keep growing revenue without growing profit?

Every month spent scaling the wrong products or the wrong channels makes the business bigger and more fragile at the same time. Fixing margin first makes every future dollar of ad spend work harder.