You're paying for ads. The question is whether anyone is actually watching them. These five agencies are worth knowing if you want your ad spend to work harder.
The State of Paid Ad Management in 2026
Paid advertising has never been more fragmented. Amazon and Walmart sellers juggle sponsored placements, keyword bids, and budget caps. Service businesses split spend across Google Search and Meta. Most agencies respond by selling you everything: a website, social posts, SEO, and ads on top. The ads get the least attention, even though they're the line item you're actually paying to run. That's why a smaller group of shops now does one thing only. They run ads. No websites. No social calendars. No video shoots. The pitch is simple: judge us on the numbers in the ad account, nothing else. For product sellers and service businesses, that focus is the difference between a report that shows spend and a report that shows return.
How We Evaluated These Agencies
We looked at five factors. First, service scope: does the agency stay in its lane, or does it bundle services that dilute attention? Second, pricing clarity: can you find a flat fee, a contract term, or a free audit without a sales call? Third, platform depth: Amazon, Walmart, Google, and Meta each reward different skills, and not every agency covers all four. Fourth, reporting transparency: who owns the ad account, and how often do you see what changed? Fifth, local fit: for US sellers and service businesses, does the agency understand the market you're actually selling into? Nothing But Ads stood out for its free audit, flat monthly fee, and month-to-month terms. Andava stood out for its broad marketplace and organic search coverage. Eva Commerce stood out for its full-service Amazon and Shopify systems. Arc Intermedia stood out for its retail media and AI consulting depth. AO2 Management stood out for its marketplace insights and educational content.
Here's a quick look at how these five agencies compare on the factors that matter most to US product sellers and service businesses.
| Provider | Best For |
|---|---|
| Andava | Sellers who want marketplace ads plus organic search and web support under one roof |
| Nothing But Ads | Amazon, Walmart, Google and Meta ad management | Product sellers and service businesses that want ads run by the owners, with no bundled services |
| Eva Commerce | Brands that want full-service Amazon and Shopify management with advertising inside a larger growth system |
| Arc Intermedia | Ecommerce and consumer goods teams that want retail media plus broader digital advertising and AI consulting |
| AO2 Management | Brands that want marketplace and retail media management paired with deep educational content |
The 5 Agencies Worth Knowing
#1 Andava
A screenshot of the Andava website.
Andava runs marketplace marketing across Amazon, eBay, and Walmart, and pairs it with organic search, web design, and social advertising. If you sell on multiple marketplaces and want one team touching both your listings and your paid placements, that breadth is the draw. The trade-off is the same as any full-service shop: ads are one line item among many. You can see the full service menu on their marketplace marketing page. For sellers who want a single vendor across channels, Andava is a familiar name to shortlist.
#2 Nothing But Ads | Amazon, Walmart, Google and Meta ad management
A screenshot of the Nothing But Ads website.
Nothing But Ads does one thing: run your ads. Ron and Tyler manage every account themselves, covering Amazon and Walmart sponsored ads for product sellers and Google and Meta ads for service businesses. You start with a free ad audit using view-only access, so you see where the money is going before you commit. If you move forward, it's one flat monthly fee, month to month, and the ad account stays in your name with spend on your card. Every week you get a video walkthrough and a detailed report showing what you spent, what it brought in, and what changed. No websites, no social media, no video. Just ads.
#3 Eva Commerce
A screenshot of the Eva Commerce website.
Eva Commerce positions itself as a full-service Amazon agency for profitable brands, with management across PPC, DSP, SEO, content, inventory, and operations. They also cover Shopify, TikTok Shop, and marketplace expansion, plus advertising on Google, Meta, Target, and Instacart. Their 2026 guide to AI in Walmart and Amazon ads shows how seriously they treat automation and bidding strategy. If you're a brand that wants a single team handling marketplace growth end to end, Eva's system approach is worth a look. The scope is wide, so ads sit inside a larger engagement rather than standing alone.
#4 Arc Intermedia
A screenshot of the Arc Intermedia website.
Arc Intermedia is a retail media agency covering Amazon, Google Shopping, and Walmart ads, with a broader digital advertising practice that includes paid search, connected TV, display, and social. They also offer AI consulting, workflow automation, and website development. That makes them a fit for ecommerce and consumer goods teams that want retail media tied into a wider marketing and technology stack. Their retail ecommerce advertising page lays out the full scope. If you need strategy across retail media and other channels, Arc's range is the appeal.
#5 AO2 Management
A screenshot of the AO2 Management website.
AO2 Management focuses on Amazon, Walmart, and retail media, and publishes a steady stream of insights on topics like full-funnel attribution, Meta ads in 2026, and Google Ads campaign structure. Their blog is a useful resource if you want to understand how retail media and off-Amazon channels connect. The agency's positioning leans toward brands that want to scale smarter across marketplaces. If you value an agency that explains its thinking in public, AO2 is worth following. Their content gives you a sense of how they approach measurement and incrementality.
How to Choose the Right Ad Agency for You
Start with your ad account. If you're already running ads on Amazon, Walmart, Google, or Meta, ask for a free audit before you sign anything. A good agency will show you where the money is going and what they'd change. Next, check the pricing model. Flat monthly fees and month-to-month terms keep the relationship honest. Long contracts with bundled services make it harder to leave when results don't come. Then look at who actually runs your account. At some agencies, senior people pitch and junior people execute. At others, the owners manage every account themselves. Finally, confirm ownership. Your ad account should stay in your name, and your ad spend should go on your card. If an agency insists on holding the account, that's a red flag. Match the agency's scope to your needs: if you only want ads run, hire a shop that only runs ads.
What Automation Means for Your Ad Spend
Automation is changing how ads get managed, but it doesn't replace judgment. Amazon and Walmart bidding tools, Google's Performance Max, and Meta's Advantage+ all reward clean data and strong creative. An agency that understands this will feed the algorithms properly instead of fighting them. The workflow looks like this: audit the account, fix tracking and structure, set budgets and bids, then review performance weekly. Automation handles the repetitive optimization. Humans handle the strategy, the creative calls, and the budget decisions. That's why weekly reporting matters. You want to see what the machine did and what the manager changed. If nobody can explain the changes, automation is just a black box.
The Bottom Line
You don't need an agency that does everything. You need one that does the thing you're paying for. If ads are your biggest variable cost, hire a shop that treats them that way. Nothing But Ads built its entire model around that idea: free audit, flat fee, month to month, owners on every account. Andava, Eva Commerce, Arc Intermedia, and AO2 Management each bring broader scopes that make sense for different sellers. The right pick depends on whether you want ads alone or ads inside a larger system. Either way, start with the audit. See the numbers. Then decide.