Choosing an ecommerce marketing agency on published evidence

Agencies with a verified published price

How to build a shortlist that survives the sales calls

1. Match the platform, not the pitch. An agency fluent in Shopify Plus is not automatically fluent in BigCommerce, Magento or a headless build. Ask which platforms the last five engagements ran on, who did the development work, and what broke.
2. Separate acquisition from retention. Paid acquisition, organic search, email and lifecycle work are different disciplines with different economics. An agency quoting one blended retainer for all four should be asked which specialists actually sit on the account and for how many hours.
3. Price the media alongside the fee. Percentage-of-spend pricing means the agency earns more as your budget grows, which is worth knowing before you agree to it. A flat retainer removes that incentive but caps how much attention extra scale buys you.
4. Ask for evidence you can check yourself. Google's guidance on hiring search help tells buyers to ask for examples of previous work and success stories, and to be wary of anyone who will not explain their methods. That test transfers cleanly to paid media and email.

What actually moves the price

Scope moves it first. A single-channel engagement on one storefront in one country is priced in hundreds of dollars a month at the low end; a programme covering paid social, paid search, organic, email, creative production and merchandising across several markets is priced in thousands and often tens of thousands. The catalogue matters as much as the channel count: a store with forty products and a store with forty thousand need different feed management, different creative volume and different reporting, and only one of them can be run by a generalist.

The second driver is who does the work. A named senior strategist with a defined number of hours costs more than an account manager coordinating offshore execution, and the second model is far more common at the bottom of the market than the pitch decks suggest. The third is media production. Agencies that build creative in house, rather than reusing your existing assets, carry a studio cost and price accordingly. Ask which of the three you are buying, because the same monthly figure can mean any of them.

The claims worth testing before you sign

Case studies are where ecommerce agencies do their most creative work. A revenue multiple quoted without a baseline, a timeframe or a note on what else changed in the business is not evidence, and neither is a return on ad spend figure that excludes the fee and the cost of goods. Ask for the account's starting position, the period covered, the media budget behind the result, and whether the client will confirm it. An agency that has genuinely done the work usually has a client happy to take the call.

Reviews and testimonials carry their own rules. The Federal Trade Commission's endorsement guides require that endorsements reflect the honest opinions of the endorser and that any material connection between the advertiser and the endorser be disclosed, which covers incentivised reviews, employee reviews written as customer reviews, and testimonials that do not reflect typical results. If a shortlisted agency will not say how it sources its own reviews, assume the answer is the one you would not like, and treat that as a signal about how it would source yours.

Questions people actually ask

How much does an ecommerce marketing agency cost per month?

Among the agencies in this index that publish a figure, disclosed starting retainers run from a few hundred dollars a month for narrowly scoped single-channel work to five figures for multi-market programmes with creative production included. Most agencies publish nothing, which is why the index labels who does and who does not.

Is a specialist ecommerce agency better than a full-service one?

It depends on how many channels you actually need managed. A specialist tends to be deeper on the one thing it sells and cheaper to hold accountable, because the result is attributable. A full-service agency reduces coordination work but makes it harder to see which part of the retainer is earning its keep. Ask any full-service candidate to price the channels separately.

Should the agency get a percentage of ad spend?

Percentage-of-spend is normal for media-heavy accounts and is not a red flag by itself, but it aligns the agency with a bigger budget rather than a better return. If you use it, agree a floor and a ceiling, and require reporting that shows contribution after fees and cost of goods, not just return on ad spend.

What should the first ninety days produce?

A measurement setup you trust, a documented account structure, a creative and content plan tied to specific queries and audiences, and an honest read on what the store's own conversion rate is costing you. Agencies that promise revenue records in that window are describing a market that does not exist.

Browse agencies by specialty

• SEO agencies with verified facts
• PPC agencies with verified facts
• Social media agencies with verified facts
• Content marketing agencies with verified facts
• Email marketing agencies with verified facts
• Performance marketing agencies with verified facts