Introduction
An ecommerce Google Ads agency runs the paid search side of your online store. That usually means Search campaigns, Google Shopping ads, and Performance Max, along with the product feed that powers most of them. You share access to your accounts and your margin data, and the agency handles the daily work.
For an established brand, the job looks different than it does for a new store. You already have customers searching for your name, a catalog with years of sales data, and other channels like Meta and Amazon bringing in demand. The agency has to grow sales from new shoppers without spending money on people who were going to buy from you anyway.
This guide explains what separates a strong agency from an average one, how each fee model affects the advice you get, and which warning signs to watch for. You will also find our ranking of 10 agencies, along with the type of brand each one suits best.
What should an established brand expect from a Google Ads agency?
Most agencies can build campaigns and write ad copy, so those skills will not tell you much during a sales call.
The real differences show up in how an agency measures success, how it sets up automation, how it charges you, and who works in your account each day. The five sections below explain each one in plain terms.
Reporting that starts with profit
ROAS, or return on ad spend, shows how much revenue came back for every dollar you spent on ads. It is a useful number, but it leaves out product costs, shipping, and fees. A campaign can report a healthy ROAS and still lose money on each order.
A good agency puts profit at the top of every report. You should see contribution margin, which is the money left from each order after product cost, shipping, payment fees, and ad spend. The ROAS figures can sit underneath as supporting detail.
A blended view across all your channels
Each ad platform counts its own sales, and the same order often gets claimed by Google, Meta, and your email tool at the same time. When you add those reports together, your marketing looks more productive than it really is.
MER, or marketing efficiency ratio, solves this problem. You calculate it by dividing total store revenue by total marketing spend across every channel. Because it uses your store numbers, no single platform can take extra credit, and your agency should review the trend with you every week.
Google, Meta, and email can each claim the same order. MER uses your store numbers, so no single platform can take extra credit.
Performance Max set up with care
Performance Max, often shortened to PMax, is a Google campaign type that places your ads across Search, Google Shopping ads, YouTube, Display, Gmail, and Maps from a single campaign. Google automation’s decides where each dollar goes, based on your goals and your product feed.
The problem is that PMax will happily show ads to people who already searched for your brand name. It then counts those sales as new results, even though many of those buyers would have found you on their own.
An experienced agency adds brand exclusions in the first week and checks PMax results against your total revenue and new-customer numbers.
A fee model that matches your goals
The way an agency charges affects every recommendation it makes. When the fee is a share of your ad spend, the agency earns more each time your budget grows, even if the extra spend brings in little profit.
A monthly retainer removes that pull. The agency's fee is priced on the scope and complexity of the work rather than your spend, so it can tell you to pull back when the numbers call for it. We cover each fee model in more detail in the pricing section below.
Experienced people working in the account
It is common for an agency to bring experienced strategists to the pitch and then hand the account to a junior manager after you sign. On an established brand, that handoff tends to show up as slower decisions and more wasted budget.
You want the person managing your account to have years of hands-on ecommerce experience. Someone who has run dozens of accounts can usually spot a broken feed, a tracking error, or an overspending campaign within days.
How do you work out break-even ROAS for your store?
Before you judge an agency's results, it helps to know the lowest ROAS your store can accept. This number is called break-even ROAS, and it marks the point where ad spend stops paying for itself.
Here is a simple example. Say you sell a product for $60, and after product cost, shipping, and payment fees, you keep $24 per order. Your break-even ROAS is $60 divided by $24, so the answer is 2.5.
$60 sale price ÷ $24 kept per order after product cost, shipping, and payment fees.
Every ad dollar must bring back at least $2.50. A reported 2.2 ROAS on this product loses money on each order.
That means every dollar you spend on ads needs to bring in at least $2.50 in revenue before the sale makes money. If an agency reports a 2.2 ROAS on that product and calls it a win, each of those orders is actually losing money. Your agency should know this number for your top-selling products before it sets any targets.
Why listen to us
Olifant Digital is a full-service Amazon and DTC ecommerce marketing agency, and Google Ads is one of the channels we run for established brands every day. Our account managers work inside these accounts, so the standards in this guide come from what we see go right and wrong in real campaigns.
This is our own ranking, and we place ourselves first. We built our Google Ads service around the standards described here, so we think the top spot is fair. You should still compare us with the other eight agencies and decide based on your own needs.
We are not the right fit for every brand. If you spend less than about $10,000 a month on Google, our fees would take up too much of your budget. Brand-new stores with little sales history are also better served by a freelancer until they have enough data to work with.
How we scored the agencies in this ranking
Every agency in this guide was scored on the five areas above. We added two more factors that start to matter once a brand reaches a certain size.
The first is incrementality testing. Incrementality means the sales your ads actually created, as opposed to sales that would have happened without them. Agencies that run geo-holdout tests can show you this number with real evidence instead of platform estimates.
The second is omnichannel coordination. Most established brands also sell on Amazon and advertise on Meta, and Google ads affect both channels. An agency that plans Google alongside your other channels is less likely to take credit for sales that another channel created.
Where public information was limited, we based our view on what each agency publishes about its services, focus, and pricing.
How do the top 10 agencies compare?
The table below gives you a quick view of each agency, including its main strength, fee model, reporting style, and Performance Max depth.
| Agency | Best for | Pricing model | Profit-first reporting | Performance Max depth | DTC focus |
|---|---|---|---|---|---|
| Olifant Digital | Profitable DTC growth at scale | From $2,000 per month, no % of spend | Yes: MER, contribution margin, CAC | High: about 90% of budget in PMax, brand excluded | High |
| Common Thread Collective | DTC forecasting and MER | Retainer | Yes: MER-led | Medium | High |
| MAG Growth | Amazon brands scaling DTC | Custom | Yes: CAC, ROAS, LTV to CAC | High: PMax plus feed optimization | High |
| KlientBoost | Ads paired with CRO | Retainer tiers | Partial | Medium | Medium |
| Wpromote | Large multi-channel budgets | Custom | Partial | High | Medium |
| ROI Revolution | Retail and catalog depth | Custom | Partial | High | High |
| Pilothouse | Creative-led performance | Retainer | Partial | Medium | High |
| SmartSites | Web design plus PPC | Retainer plus % of spend | Partial | Medium | Medium |
| Logical Position | Mid-market managed spend | % of spend or retainer | Partial | Medium | Medium |
| Coalition Technologies | SEO plus paid search | Hourly or retainer | Partial | Medium | Medium |
Read this table as a first filter. Pick the two or three agencies whose fee model and reporting style match how you already run your business, then use the questions later in this guide to narrow the list.
The 10 best ecommerce Google Ads agencies for established brands
1. Olifant Digital, best overall for profit-first DTC growth
Olifant Digital is a full-service Amazon and DTC ecommerce marketing agency for established brands that want to grow without giving up margin. We run Google Ads as a performance layer on top of Meta.
Our focus is on shoppers who are searching for products like yours but have not found your brand yet.
A senior account manager with at least 7 years of experience manages every account, and we do not staff juniors. Our work runs through Olifant AI, the in-house platform our engineering team built and keeps improving. Our data scientists also review every client account daily.
In most accounts, we put about 90% of the Google budget into Performance Max and exclude branded traffic from the start. The product feed is our first project, because titles, images, and attributes decide which searches your products can appear for. Your reports cover profit, MER, contribution margin, and new-customer CAC, or customer acquisition cost, and we run geo-holdout tests to confirm what Google added.
You get a dedicated Slack channel and a weekly call to review results and agree on next steps. Services start from $2,000 per month and are custom for each project, with no percentage-of-spend fees, and every engagement carries our 60-day money-back guarantee: if you're not happy in the first 60 days, we refund your management fees.
We added $1,098,692 in monthly revenue for COCOSOLIS. We grew Coat Defense to $699,786 per month in DTC revenue, took The Magic Scent from $50K to $411K per month, and added $250,344 per month for LyfeFuel. For Wildride, we added $179K in monthly revenue and reached a 7-figure US run rate in 42 days. You can read the details in our case studies.
It suits established DTC brands on Shopify that already run Meta and want profitable growth from new customers on Google.
2. Common Thread Collective, best for DTC forecasting and MER
- Best for: Growth-stage DTC brands that plan around revenue forecasts
- HQ: Santa Ana, CA
- Focus: DTC growth strategy, forecasting, and media buying
- Pricing: Retainer, with project minimums around $5,000
- Results: Not published in detail for named clients
Common Thread Collective ties media buying to revenue forecasting and profit planning. The team talks openly about blended metrics like MER, and it also owns and runs DTC brands of its own. That gives its strategists firsthand experience spending their own money on ads.
Its planning style works well for founders who want the whole business modeled before budgets move.
Smaller brands may find the minimums high compared with what they spend on Google. It suits growth-stage DTC brands that want Google and Meta spend tied to a detailed forecast.
3. MAG Growth, best for Amazon brands scaling their own DTC store
- Best for: Established Amazon brands growing sales on their own Shopify store
- HQ: Atlanta, GA
- Focus: Google Ads, Performance Max, product feeds, Meta ads, and email
- Pricing: Custom, quoted per account
- Results: Published for named clients, including Super Appliance Parts
MAG Growth is the DTC agency from the team behind My Amazon Guy, which has managed $1.4B+ in ecommerce revenue across 430+ brands. It makes the product feed its first project and reports on CAC, ROAS, and LTV to CAC across the full customer journey. For Super Appliance Parts, monthly website sales rose from under $5,000 to $33,602 in about ten months while CAC fell from $25.34 to $9.99.
Its Amazon roots work well for brands that want Google budgets planned with marketplace demand in view.
Brands with no Amazon presence will use less of its cross-channel planning. It suits Amazon-native brands that want Google, Meta, and email planned together with their Amazon business.
4. KlientBoost, best for ads paired with conversion work
- Best for: Brands that want ads and landing pages tested by one team
- HQ: Costa Mesa, CA
- Focus: PPC, landing pages, and conversion rate optimization
- Pricing: Retainer tiers, quoted on request
- Results: Shared in case studies, mostly without client names
KlientBoost is known for fast testing across ads and landing pages. It sells paid media and conversion rate optimization, or CRO, as a combined service. The same team works on your ads and on the pages those ads send people to.
Its client base mixes ecommerce with SaaS and lead generation. Because of that, its product feed and Google Shopping ads work may be less specialized than at a retail-only agency.
It suits brands that want frequent creative and landing page tests run by one team.
5. Wpromote, best for large multi-channel budgets
- Best for: Mid-market and enterprise brands consolidating several channels
- HQ: El Segundo, CA
- Focus: Paid search, paid social, SEO, and analytics
- Pricing: Custom
- Results: Not published for named clients
Wpromote handles paid search, paid social, SEO, and analytics for mid-market and enterprise clients. Brands with large budgets across several channels use it for integrated media planning.
Its range is useful when you want to cut down the number of agencies you work with. Google Ads then becomes one service among many, so ask how the Google team works with the social and SEO teams and how often they meet. It suits brands that want one agency for a large budget spread across many digital channels.
6. ROI Revolution, best for retail and catalog depth
- Best for: Retailers with large catalogs
- HQ: Raleigh, NC
- Focus: Ecommerce paid search, Google Shopping ads, and marketplaces
- Pricing: Custom, quoted on request
- Results: Not published in full for named clients
ROI Revolution works only with retail and ecommerce brands, and many of its clients carry large catalogs. Its main strength is product feed management for Google Shopping ads, backed by in-house technology and analytics support.
Retailers with thousands of SKUs, or individual product listings, get the most from that feed depth, because small errors across a big catalog add up quickly. The agency leans toward larger budgets. It suits high-SKU retailers that need careful feed and Google Shopping ads management.
7. Pilothouse, best for creative-led performance
- Best for: DTC brands where ad creative is the main bottleneck
- HQ: Victoria, BC, Canada
- Focus: Media buying paired with in-house creative production
- Pricing: Retainer, quoted on request
- Results: Not published in detail for named clients
Pilothouse puts media buyers and a full creative studio on the same team. It works mainly with DTC brands and runs campaigns across Meta, Google, TikTok, and YouTube.
This setup helps brands that struggle to produce enough new ads, since fresh assets come from the same people who buy the media.
Google Search and Google Shopping ads are part of the offer, although its reputation comes mostly from creative work on social platforms. It suits DTC brands that want creative and media buying managed together.
8. SmartSites, best for web design plus PPC
- Best for: Brands rebuilding their store while running paid campaigns
- HQ: Paramus, NJ
- Focus: Web design, SEO, and PPC management
- Pricing: Retainer, sometimes combined with a percentage of spend
- Results: Not published for named clients
SmartSites offers web design, SEO, and PPC management from one provider. Having the site and the ads with the same team can make landing page changes faster, since nobody waits on a second agency.
Its client list covers many industries beyond ecommerce. Ask to see accounts similar to yours in size and category before you sign. It suits brands that want website work and PPC handled by the same team.
9. Logical Position, best for mid-market managed spend
- Best for: Small and mid-market brands on a modest budget
- HQ: Lake Oswego, OR
- Focus: Managed PPC, Google Shopping ads, and feed management
- Pricing: Percentage of spend or retainer, with low entry plans
- Results: Not published for named clients
Logical Position is a large managed PPC agency serving thousands of advertisers across Google and Microsoft Advertising. It is a Google Premier Partner and uses its own feed tool to manage Google Shopping ads for bigger catalogs.
The agency runs a standardized process. That keeps prices low, but you get less personal contact than a boutique agency would offer. It suits mid-market brands that want steady, dependable PPC management without a large monthly fee.
10. Coalition Technologies, best for SEO plus paid search
- Best for: Brands that want organic and paid search planned together
- HQ: Los Angeles, CA
- Focus: SEO, web development, and paid media
- Pricing: Hourly or retainer
- Results: Not published for named clients
Coalition Technologies combines SEO, web development, and paid media, with plenty of experience on Shopify and other ecommerce platforms. Brands that want organic and paid search in one plan often put it on their shortlist.
SEO is the strongest part of its offer, so Google Ads may play a supporting role in your overall plan. It suits brands that want SEO and paid search coordinated by a single team.
How much does an ecommerce Google Ads agency cost?
Most ecommerce Google Ads agencies charge in one of three ways. You pay a percentage of your ad spend, a monthly retainer, or a mix of both. The model you choose shapes the advice your agency gives you.
| Fee model | Typical range | Incentive it creates | Best fit |
|---|---|---|---|
| Percentage of spend | 10-20% of monthly ad spend | Rewards higher spend, even when efficiency drops | Small budgets where the fee stays modest |
| Monthly retainer | Fixed monthly fee for a defined scope | Rewards profit and efficiency | Established brands planning to scale spend |
| Hybrid | Base fee plus a smaller percentage | Depends on how the fee is split | Brands moving from one model to another |
Use this table to match the fee model to your stage. Brands that plan to increase spend over the next year will feel the difference between these models the most.
Here is what that looks like in dollars. Say you spend $80,000 a month on Google, and your agency charges 15% of spend. Its fee comes to $12,000 a month.
Now say you raise spend to $120,000. The fee climbs to $18,000, even if the extra $40,000 brings in very little profit. Under a monthly retainer, the fee is priced on the scope and complexity of the work at both budgets, so your agency has no reason to push spend higher than your margins allow.
How can you tell if an agency is taking credit for sales you already own?
Branded search is the easiest place for an agency to make its results look better. People who type your brand name into Google were likely going to buy from you anyway, so paying for those clicks adds little. When those sales are mixed into campaign reports, performance looks stronger than it is.
In the accounts we audit, PMax usually holds the biggest share of Google spend, and most of its budget lands on Google Shopping ads. Because the system leans toward warm and branded audiences, its reported ROAS often overstates the sales it actually created.
You can check this in three steps. First, ask whether branded search terms are excluded from PMax and prospecting campaigns. Second, ask for revenue and new-customer acquisition cost (CAC) reported separately for branded and non-branded traffic.
Third, ask about geo-holdout testing. In a geo-holdout, Google ads are paused in a group of matched regions for a few weeks while they keep running everywhere else. The revenue difference between the two groups shows what Google really added.
What red flags should you watch for?
Some agencies look strong in a pitch and cost you money once the work starts. These warning signs usually show up in the first few weeks, so it pays to watch closely early on.
Be wary of an agency that accepts every auto-applied recommendation. Google suggests changes inside every Ads account, such as higher budgets or broader keywords.
Many of those suggestions raise costs before they raise sales, and an experienced team reviews each one before it goes live.
Check who owns the account, too. Your Google Ads account, Merchant Center, and historical data should sit under your own business login. If an agency runs your campaigns inside its own account and will not move them, you could lose years of data when you leave.
Long contracts with steep exit fees are another warning sign. Agencies that trust their own results usually offer a 30- or 60-day notice period. A 12-month lock-in makes it hard for you to leave if performance drops.
Finally, pay attention to how reports arrive. A dashboard link with no written notes leaves you guessing. You should get a clear summary of what changed, what it cost, and what the team plans to do next.
What questions should you ask before you hire an agency?
A sales call is your best chance to test an agency before you commit. Go in with specific questions and push for specific answers.
Start by asking who will work in your account each day and how many years of ecommerce experience that person has. Then ask whether the agency will put that staffing commitment in the contract. Getting it in writing protects you if the team changes after the first few months.
Next, ask to see a sample report from a brand similar to yours. Look for contribution margin, MER, and new-customer CAC in the standard report, along with written notes on what the team changed that week.
Before you sign, ask to speak with two current clients at your revenue stage. A short call with a brand like yours will tell you more about day-to-day service than any case study page.
It also helps to know what working rhythm to expect. A good agency reviews spend and profit every week, makes search term and placement changes every 7 to 14 days, and runs a full account audit once a quarter.
Frequently asked questions
How long until a new Google Ads agency shows results?
Most brands see early signs within the first month and clearer profit trends by around 90 days. The first few weeks usually go into auditing the account, fixing tracking, and cleaning up the product feed. Results can move up and down while campaigns relearn, so judge the agency on the quality of its work during that period.
What does an agency need from you during onboarding?
Plan to share admin access to Google Ads, Merchant Center, GA4, and your Shopify store in the first week. The agency will also need product costs or margins by SKU, since profit reporting is impossible without them. Promotion calendars and known stock issues help too.
Should conversion tracking be fixed before you hire an agency?
No, but you should know where the gaps are. A good agency will confirm that each purchase is counted once, that revenue values match your store, and that enhanced conversions are switched on. If tracking is broken, fixing it becomes the first project.
Is Microsoft Advertising worth adding for an ecommerce brand?
For many established brands, it is a sensible next step once Google is running profitably. You can import campaigns straight from Google Ads, so setup takes little time. Judge it on the same profit and MER numbers you use for Google, and scale it only if it holds up.
Should an established brand hire an agency or build in-house?
Hire an agency when you need experienced people across Google, Meta, and Amazon faster than you can recruit them.
Building in-house makes more sense when one channel drives most of your business and you can attract senior talent to own it. Many established brands use a hybrid, with strategy kept in-house and an agency running execution and measurement.
How should you prepare Google Ads for Q4 and big sales events?
Start about six weeks ahead. Add sale prices to your product feed early so Merchant Center approves them in time, and raise budgets in steps instead of all at once. It also helps to pause ads on products that are close to selling out.
Final thoughts
The best ecommerce Google Ads agency for an established brand protects your profit while it brings in new customers. When you compare agencies, look closely at how each one reports profit, sets up Performance Max, handles branded search, tests incrementality, staffs your account, and charges for its work.
Olifant Digital ranks first in this guide for profit-first DTC growth. You get senior account managers only, our in-house AI platform Olifant AI, services from $2,000 per month that are custom for each project, and a 60-day money-back guarantee: if you're not happy in the first 60 days, we refund your management fees.
If you want to see how this would work for your brand, get your free marketing plan from Olifant Digital. Our team will review your current Google Ads setup and show you where your budget can work harder, with no obligation to sign.
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Alex is the founder and CEO of Olifant Digital, where his team manages over $100M in annual client revenue across 50+ e-commerce brands. He sets the agency's strategy and methodology, audits client accounts, and reviews the team's work to make sure every brand is on track to hit its growth and profitability goals. He also leads team training, so the performance data and lessons from across all accounts shape how every account manager runs their clients.
