Best Marketing Agency for DTC Brands: How to Choose.

The best marketing agency for DTC brands runs Meta, Google Shopping and Performance Max, Amazon and Klaviyo as one plan against one P&L, and judges every channel by blended contribution margin rather than each platform's own ROAS. If an agency can only show you a Meta dashboard or an Amazon ACOS chart, it is managing a channel, not your business.

This guide is for founders and growth leads at Shopify and DTC brands, including brands also selling on Amazon and at retail, hiring a first agency or replacing one. For how we approach the category, see our e-commerce marketing page.

What a DTC specialist does that a generalist does not.

A generalist optimizes the metric each platform reports. A DTC specialist optimizes the order and the margin behind it:

• One P&L across channels. Meta, Google, Amazon and email share one budget view, because a dollar moved from Meta to Sponsored Products changes both.
• Margin, not revenue. Targets are set from product cost, shipping, fulfillment, discounts and returns, so a campaign that looks profitable on ROAS but loses money per order gets caught.
• Feed and catalog as a channel. Shopping, Performance Max and Meta catalog ads all run on product data, so the feed is maintained, not exported once.
• Creative as a supply chain. Meta prospecting burns through creative, so new concepts ship on a schedule, not after performance drops.
• Retention in the same plan. Klaviyo email and SMS flows belong in the acquisition math, because a first order is worth what repeat buying makes it.

The hard parts of DTC growth.

Most DTC brands do not fail on ad setup. They fail between channels.

Attribution disagreement. Meta, Google Ads, Amazon and Shopify each count sales their own way, with different attribution windows and different credit rules, so the platform numbers add up to more than the orders you shipped. A good agency reports blended figures from your store first: total revenue over total ad spend (often called MER), new customer acquisition cost, and contribution margin after ad spend. Platform ROAS stays useful inside a channel. Post-purchase surveys add a direct "how did you hear about us" answer, and marketing mix modeling earns its cost once spend spans enough channels. We compare tooling in Triple Whale vs Northbeam and cover when modeling pays off in marketing mix modeling for mid-size brands.

Catalog and feed quality at scale. With hundreds or thousands of SKUs, feed errors compound. Google Merchant Center requires core attributes such as id, title, description, link, image link, availability and price, plus brand for most new products, and asks for a GTIN where one exists. At the time of writing, Google says products submitted with an incorrect GTIN will be disapproved, and that feed price and availability should match the landing page, structured data and checkout. Variants and sale pricing are where large catalogs drift.

Amazon and DTC cannibalization. When a brand sells on both, Amazon often captures shoppers who first discovered the product through your Meta or Google ads. Amazon Attribution measures how off-Amazon marketing drives discovery and purchases on Amazon, so you can see Meta and Google spend that converts there instead of on your site. Branded search is a second leak: you may pay twice for the same customer.

MAP and pricing. Unauthorized resellers undercutting your price on Amazon pull the Buy Box away from you and hurt conversion on your own site. Minimum advertised price is your policy, enforced through your reseller agreements and monitoring. An agency that runs both channels should watch price across the store, Amazon and retail, so your ads are not sending traffic to a cheaper competing offer.

Platform automation. Google's Performance Max for online sales runs from a Merchant Center feed, and Meta's developer documentation describes Advantage+ sales campaigns as the updated version of what were called Advantage+ shopping campaigns. Both lean on automation, so the inputs (feed, creative, conversion data) matter more than bid settings.

Criteria to judge a DTC agency.

Use the same criteria for every finalist so the answers can be compared side by side.

Questions to ask in the first call.

• What number do you report first each week, and where does it come from?
• How do you set a target ROAS or CPA from our margins, and what costs do you include?
• How would you split budget between Meta, Google and Amazon for us, and what would make you change it?
• How do you measure whether Meta and Google spend is converting on Amazon instead of our site?
• Which Klaviyo flows would you build or fix first, and how do you measure them?
• How do you handle unauthorized resellers and MAP violations on Amazon?
• Who works on our account each week, and what access will you need?

Red flags.

• Platform ROAS as the headline. If the report sums each platform's attributed revenue, it will overstate results.
• Percent of sales pricing with no margin view. The agency is paid more when revenue grows, even if profit does not.
• Channel silos. One team for Meta, another for Amazon, nobody accountable for the total.
• No feed ownership. Shopping and Performance Max results depend on product data that nobody is maintaining.
• Guaranteed results. No one can guarantee a ROAS or a sales number on platforms they do not control.

How pricing usually works.

DTC agencies tend to price in one of four ways, and each changes the incentives:

• Flat monthly retainer. A fixed fee for a defined scope, usually set by channels, SKU count and ad spend. Predictable, and the agency is not paid more for spending more.
• Percent of ad spend. Common for paid media. Simple, but it rewards higher budgets whether or not they pay back.
• Percent of revenue or sales. Sounds aligned, but revenue is not profit, and the fee rises with sales you might have made anyway.
• Hybrid. A base fee plus a performance component. Read exactly what the performance metric is and where the data comes from.

Also check whether creative, Klaviyo and Amazon catalog work sit inside the fee or are billed separately.

How to run the selection.

Where Theory Road fits.

Theory Road is a growth firm near Austin, Texas. For product brands selling direct, at retail and on Amazon, we run the storefront, the marketplace, the ads and the email together and report them as one number. We operate product brands of our own on Shopify and Amazon, so the playbook is the one we use ourselves. Details are on our e-commerce and product brands pages.

• Paid media. Google Shopping and Performance Max from a Merchant Center feed that stays clean, and Meta campaigns with the pixel and Conversions API, measured to contribution margin, with new creative tested on a fixed schedule. See paid media.
• Amazon. Brand Registry, listings and A+ content, the Brand Store, Buy Box and reseller policy, and Sponsored Products, Brands and Display judged on TACOS, not ACOS. Amazon Attribution setup, including the Brand Referral Bonus, and Amazon Marketing Cloud analysis. See e-commerce and Amazon.
• Pricing across channels. Reseller and MAP policy, pricing strategy across DTC, retail and Amazon, and monitoring so you are not undercutting your own store.
• Retention. Klaviyo welcome, abandoned cart, post-purchase and win-back flows, plus a monthly campaign calendar.

Our e-commerce and Amazon work is priced as a flat monthly retainer scoped to SKUs, marketplaces and ad spend, never a percentage of your sales, and the first two weeks are an audit followed by a written plan. Advertising-only engagements are available for brands that already have operations covered. Our sweet spot is brands from roughly $1M to $50M with proven demand. We are not a fit for brands that only want the cheapest bid, or for one-off projects outside our services. To work with Theory Road, tell us what you need.