Running an ecommerce brand in 2025 is like hauling feral cats out of a burning building — noble work, but try it alone and you’ll come out with more scars than survivors. That’s because ecommerce isn’t a single challenge; it’s dozens of moving, clawing parts that demand your attention all at once. Scaling an online store goes way beyond having great products. Visibility, customer experience, and platform mastery all play a role in turning browsers into buyers.
Ecommerce agencies step in as that extra set of hands. They handle the heavy lifting across SEO, paid ads, conversion rate optimization, design, and retention so you can focus on keeping your business upright and your capital from bleeding dry.
In this guide, we’ll cover what ecommerce agencies actually do, how to know if it’s time to hire one, what makes a ‘best’ agency stand out, and seven agencies in the U.S. worth your attention in 2025 — including ours (because, full disclosure, we’re really good at what we do).
If you’re reading this, you probably already have a sense of what an ecommerce agency does. Still, let’s not skip the basics.
An ecommerce agency is a specialized partner built to help online stores grow faster, smarter, and with fewer headaches. Unlike general digital agencies, ecommerce agencies focus specifically on the unique demands of online retail.
That means:
They’re measured by commerce-specific metrics like average order value (AOV), lifetime value (LTV), return on ad spend (ROAS), and retention — not just traffic or impressions. All of this is to say an ecommerce agency’s job isn’t finished once visitors land on your site. Their role is encouraging those visitors to stick around and actually buy something.
We’re not going to sugarcoat it: Hiring an ecommerce agency isn’t cheap. But the right one can more than pay for itself by uncovering growth opportunities you didn’t even know existed. It’s like figuring out which wire to cut on a ticking bomb after watching one YouTube tutorial. Technically possible, but maybe bringing in a professional would be safer?
In other words, the benefits go way beyond saving time (though that’s nice, too). Here’s why brands turn to ecommerce agencies in 2025:
Without checking any listings, we’re pretty confident in telling you that there are thousands of agencies out there ready to take your call. But what separates the good from the genuinely great? Flashy websites and slick pitch decks are nice, but results are what actually matter. The best ecommerce agencies prove their worth by showing exactly how they’ve helped brands move the needle.
Not every agency that slaps ‘ecommerce’ on its homepage is worth your budget. The best agencies share a few traits:
Statista projects that worldwide ecommerce sales will hit roughly $3.66tn by the end of 2025. And, if you’re like me and don’t immediately recognize ‘tn’ as a unit of measurement, it stands for trillion (12 zeroes). That’s a lot of potential growth; having a dependable agency by your side can help your business carve out its share instead of getting buried under everyone else’s.
You made it. This is the list you came here for. These seven agencies stand out in 2025 not only for their services, but for their ability to deliver measurable, platform-specific results. We’ll cover who they’re best for, what services they offer, and what makes them different in a crowded space.
Best for: Integrated growth across SEO, paid, and conversion optimization
Most agencies promise growth. 97th Floor has made a business of proving it. With deep roots in content, SEO, and analytics, 97th Floor doesn’t just help ecommerce brands ‘get more traffic’ — they work with you to align every marketing channel to generate more sales, more efficiently.
97th Floor is a full-service growth agency with a knack for turning ecommerce complexity into measurable outcomes. Their bread and butter includes:
If you want a partner that doesn’t just tweak one channel but instead pulls the whole system into alignment, 97th Floor is a top choice.
Best for: Content-driven ecommerce growth
Content is king, but only if it ranks — otherwise it’s just some obnoxious court jester that capers around the digital courtyard juggling outdated keywords (don’t mind me; just stress testing a metaphor). Siege Media built its reputation on creating research-backed, SEO-optimized content that ecommerce brands can use to win organic visibility. If you’re tired of writing blog posts that nobody reads, this is an agency that can change the story.
Strengths include:
If organic growth is your north star, Siege is the kind of agency that can help you outrank competitors without relying solely on ad spend.
Best for: Platform migrations and storefront optimization
Technology can be a brand’s biggest advantage — or its biggest bottleneck. 1Digital® Agency specializes in fixing that problem by making sure your storefront is fast, functional, and scalable, no matter which platform you’re on. Whether you’re moving from Magento to Shopify, need a WooCommerce overhaul, or want to unify your BigCommerce setup, they’ve been there.
They offer:
Overall, 1Digital® Agency is a good fit for brands with growing pains tied to their tech stack.
Best for: ecommerce SEO at scale
SEO may not be flashy, but it’s the backbone of sustainable ecommerce growth. WebFX has built a reputation on measurable outcomes, particularly around SEO. They’re a fit for ecommerce brands that want more organic traffic and are ready to invest in long-term visibility.
Services include:
They’ve worked with thousands of clients and have the scale to match complex ecommerce needs.
Best for: Amazon and marketplace strategy
For many brands, Amazon is both an opportunity and an obstacle — massive reach, sure, but also high fees, fierce competition, and limited control over the customer relationship. Nuanced Media helps navigate that complexity by giving you a strategy not only for your own storefront, but also for Amazon, Walmart, and other marketplaces where your customers are already shopping.
Highlights:
Great for brands that want to diversify beyond their own dot-com.
Best for: Conversion rate optimization and UX
If you’ve ever looked at your analytics and thought, Why aren’t more people buying? Inflow is the agency built to answer that question. They specialize in conversion rate optimization and user experience, making sure the traffic you already have does more heavy lifting.
Core strengths:
Traffic is great. Conversions are better. If your store has healthy traffic but underwhelming conversions, Inflow is a CRO partner to look at.
Best for: Performance marketing and paid growth
Growth often comes down to how well you spend your ad dollars. Upgrow focuses on performance marketing — paid search, paid social, and scaling strategies — so ecommerce brands can grow quickly without throwing money into the void.
They offer:
For ecommerce brands ready to put budget into scaling, Upgrow brings the paid expertise to do it properly and profitably.
This has been fun, hasn’t it? I mean who doesn’t love a good listicle. But it's worth recognizing that knowing who the top agencies are is only the first step. The real challenge is figuring out which one you actually want a long-term relationship with. You’re not swiping for a quick fling here — you’re looking for a partner who won’t ghost you when the budget conversation gets awkward.
Not every agency offers every service, but most ecommerce specialists fall into one or more of these categories. Think of it like a restaurant menu — you don’t have to order Ultimate Feast, but it’s good to know whether crab is available and if the lobster is fresh.
The service menu is broad, but most ecommerce agencies will cover some or all of these areas:
Do you need all of that? Maybe not. But if you’re building a working relationship with an ecommerce agency, then it might be a good idea to find one that can do everything in case your needs evolve somewhere down the line.
We sell ecommerce services, so maybe we’re not the most objective source to be asking. But we also get it: in an economy like this one, it doesn’t make sense to invest in something you might not need. If that’s you, and you’re wondering if ecommerce is the next step for your business, consider asking yourself the following questions:
In the ‘in-house vs. agency’ debate, the tipping point usually comes when you realize a single marketing hire can’t cover the breadth of expertise you need. Agencies provide a full team of specialists for the cost of one or two more employees.
At this point, you know what ecommerce agencies do, you know what makes a great one, and you know which names stand out in 2025. So why should you consider 97th Floor? The short answer: because we choose not to focus on optimizing channels and instead put our expertise to work optimizing outcomes.
97th Floor has helped ecommerce brands grow by aligning creative, technical, and analytical expertise into a single strategy. Our teams handle everything end-to-end:
At 97th Floor, the goal isn’t isolated channel wins. The goal is connecting those wins so they push the whole business forward (metaphorical cats and all).Ready to scale smarter? Let’s talk. Contact 97th Floor today to see how we can help your ecommerce brand grow in 2025 and beyond.
An ecommerce agency helps online businesses grow by improving visibility, traffic, and sales. Their work usually covers SEO, paid ads, conversion rate optimization (CRO), email marketing, UX design, and platform support (like Shopify or Magento). The goal is simple: bring more qualified buyers to your store and help them convert.
An ecommerce marketing agency takes a full-funnel approach, handling everything from ads to design to retention. An ecommerce SEO agency, on the other hand, focuses specifically on organic growth through technical SEO, content, and link-building. If you need broader support across multiple channels, a marketing agency is a better fit; if organic visibility is your biggest challenge, an SEO agency might be the right call.
The ‘best’ agency depends on your goals. Look at case studies, client results, and platform expertise. A good rule of thumb: startups often need quick traffic gains, growth-stage brands want conversion and scaling, and enterprises focus on retention and international expansion. Always check for transparency around pricing and reporting before committing.
Most agencies work with major platforms like Shopify, Magento, BigCommerce, WooCommerce, and Salesforce Commerce Cloud. Some specialize in one or two platforms, while others cover a wider range. Make sure your agency has direct experience with the platform your store runs on.
Signs include: steady traffic but low conversions, difficulty scaling into new channels or marketplaces, limited in-house expertise, or stagnant ROI from your current marketing. If your growth feels stuck, an agency can bring the team and tools to push past that plateau.
Common KPIs include revenue growth, conversion rate, return on ad spend (ROAS), average order value (AOV), customer lifetime value (LTV), and retention rate. These metrics tie directly to profitability, making them more useful than vanity metrics like impressions or raw traffic.
