When starting out, basic campaigns and weekly check-ins were all your brand really needed to see ACoS improvements and increased sales. But this basic management doesn’t work anymore when you’re an established seller generating between $500K and $20M.
Now, basic management means wasting $30K monthly on poorly executed campaigns. Instead, you need an agency that offers more: senior-led strategies without junior handoffs, TACoS-first profitability management, and daily optimizations across complex catalogs.
So, what is the best Amazon agency for established sellers? Since “best” depends on what your brand actually needs, this guide breaks down the capabilities of each of the leading agencies to help you find the right solution for your specific brand’s needs.
What Established Amazon Sellers Need from an Agency
It may be clear that it’s time to look for a new agency that understands the dynamics of running an established Amazon Brand Store. What isn’t clear is the characteristics to look for when choosing an ideal agency.
Here’s what to look for when picking an Amazon agency:
Case Studies at Comparable Revenue Scale
Case studies help get an understanding of what the agency could do for your brand. If a potential agency excels at launching new brands, it might not necessarily be the right fit to manage an 8-figure catalog.
As an established seller, you want to look for case studies that highlight brands already generating between $500K and $20M in Amazon revenue instead of entry-level launches. Additionally, case studies with specific numbers and named brands are going to be more reliable.
Experience With Complex Catalogs
An agency’s ability to manage 10 ASINs is entirely different from one that can manage 100+ ASINs. Your established brand needs an agency that is capable of ASIN-level PPC attribution, TACoS reporting per product, systematic A/B testing across a large product set, and parent-child catalog architecture.
Most agencies operate at the campaign level. This means there’s no ASIN-level visibility to make accurate optimization decisions. Instead, you want to make sure your potential agency has experience working with large catalogs and has ASIN-focused frameworks in place.
Daily Optimization Cadence
Amazon auctions shift hourly. If you’re working with an agency that offers weekly optimizations, the team is working with data that’s 6 days old. As a newer brand, this might have worked.
As an established seller investing significant ad spend, the difference between daily and weekly optimization is measured in wasted budget. For this reason, you want to pick an agency that prioritizes daily optimizations.
TACoS-First Reporting
Agencies that only report ACoS (Advertising Cost of Sale) measure one aspect: ad-attributed growth. This is important, but overall brand performance is inaccurately represented without considering TACoS (Total Advertising Cost of Sale).
TACoS looks at total ad spend against total revenue (instead of ad-attributed revenue). This means agencies that offer TACoS-first reporting provide a complete view of whether the account is growing profitability or just shifting spend between paid and organic. This is why your ideal agency should offer TACoS-first reporting.
Senior Team With No Handoffs to Juniors
Across the Amazon agency space, the most common complaint in verified public reviews is account manager turnover. This is one of the most problematic events for any established seller.
Every handoff resets strategic context and costs months of momentum when dealing with the complex accounts most established sellers have. It’s important to select an agency that offers senior account management. Reading through reviews for this agency will also reveal any patterns of turnover.
Cross-Channel Capability (Amazon + DTC)
As an established Amazon seller, you likely also run DTC operations. By working with an agency that only manages Amazon campaigns, you create a fragmented strategy.
This means that Amazon PPC decisions are made without visibility into Google, Meta, email, and organic performance. Because of this, it’s best to find agencies that are capable of unified cross-channel management.
Performance Accountability
You don’t want an agency with minimum-term lock-in conditions in their contracts. Instead, you should be selective about contract terms. Agencies that offer money-back guarantees or clean cancellation policies are generally more well liked because they are seen as more accountable. Offering a guarantee signals that the agency believes in the results they’ll deliver, which is a meaningful sign for brands investing a significant monthly retainer.
The 10 Best Amazon Agencies for Established Sellers
Each agency below was evaluated against the 7 criteria mentioned above. Particular weight was placed on verified results for brands that were already generating meaningful Amazon revenue.
#1 Olifant Digital: Best Overall for Established Amazon Brands
Olifant Digital is a senior-led, full-service Amazon agency that caters to established Amazon sellers. Brands have access to account managers with a minimum of 7 years of Amazon-specific experience. With a monthly retainer starting at $2,000, the agency reports a 60-day money-back guarantee and a 98% client retention rate that reduce some of the financial risk of investing in an Amazon agency.
The agency employs a specific methodology that has been used to improve both revenue and profitability for multiple established Amazon brands with complex catalogs. This 1-1-1-1 approach (one campaign per ASIN per match type per targeting group) enables control at the product level across large catalogs. Additionally, optimization is handled daily rather than weekly, which is done to ensure catalogs consisting of 50 to 200 ASINs remain competitive.
Why Olifant Digital Ranks #1
Olifant Digital ranked first based on how closely its model aligns with what established sellers need from an Amazon agency. The agency’s case studies consistently feature brands operating at meaningful scale. This includes 7- and 8-figure accounts with specific revenue and profitability outcomes attached.
The agency also demonstrates strong capability in managing catalog complexity. Its 1-1-1-1 ASIN-level campaign structure provides granular optimization across large product sets. This supports more accurate decision-making than smaller or early-stage-focused agencies with campaign-level approaches.
Daily optimization cadence is another differentiator. Olifant Digital reduces the overlap between auction shifts and account response by managing bids, budgets, and targeting adjustments. Its TACoS-first reporting framework also offers a more complex view of account performance by measuring ad spend against total revenue, not just ad-attributed sales. This is particularly relevant for established brands with significant organic rankings.
Documented results across established brands include:
- COCOSOLIS: Generated $1,098,692 in monthly growth and expanded into 6 international markets
- Onsen Secret: Increased monthly revenue by $95,934 while tripling profit through TACoS-first optimization
- Bullstrap: Improved revenue growth by 85% after aligning Amazon PPC and listings with brand positioning
- Wedge Guys: Increased monthly revenue by $305,771, achieved the number 1 spot in Amazon’s golfing niche, and reduced ACoS by 17% by rebuilding the account’s PPC and keyword strategy
- Beauty by Earth: Increased revenue growth by 27% in 30 days and managed 5 successful product launches through full account restructuring
Best for:
Established Amazon brands managing 50 to 200+ ASINs and generating $500K to $2M that want to sustain growth as scale
#2 Tinuiti: Best for Enterprise Established Brands
Tinuiti is one of the largest US performance agencies that offers Amazon-specific services. The agency covers Amazon Ads, DSP, and retail media at scale. Creative and landing page alignment is also managed by the agency. Tinuiti structures campaigns using metrics like ROAS and CPA to align with brand targets.
Besides offering human management, Tinuiti also offers its own proprietary software called Bliss Point. With this tool, the agency offers automated day-to-day monitoring to identify ad waste and maximize growth. For this reason, Tinuiti is a solid option for sellers that have complex multi-channel needs and are generating $5M+ on Amazon.
Verified Client Results:
- Ursa Major: Improved total sales by 15% in less than 1 year
- Illy Coffee: Improved revenue by 34% and click-through rate by 28% in under 1 year
Best for:
Established brands generating $5M+ in Amazon revenue with complex multi-channel needs
#3 Flywheel Digital: Best for Retail Media + Established Brands
Flywheel Digital is an Amazon agency with the title of being the world’s largest Amazon media buyer. While offering managed services, Flywheel Digital is primarily a software tool offering a suite of digital commerce solutions for Amazon and retail media. It’s well liked for its strong programmatic DSP capabilities and full retail media integration.
The platform offers everything from Amazon DSP and Sponsored Ads to supply chain and digital shelf management. This gives brands a single team and solution that can effectively manage performance across the entire funnel.
Verified Client Results:
- Undisclosed global apparel brand: Generated $8.5M in new-to-brand sales while decreasing CPCs by 14% and increasing ROAS by 47% within 5 months
Best for:
Established brands that want a single solution to manage omnichannel retail presence
#4 Channel Key: Best for Complex Multi-SKU Catalogs
Channel Key is an Amazon agency that offers full-service brand management across large product catalogs. The agency’s operating model is designed to manage coordinated PPC strategy, Brand Store initiatives, and retail media across multiple categories simultaneously.
For established brands with significant SKU counts, Channel Key allocates budget at a campaign level instead of focusing on keyword targeting per product. The agency’s specialists distribute this spend based on the product’s role within the catalog instead of evenly across all SKUs. By doing this, the agency identifies and prioritizes hero products with high margin value and ranking potential.
Verified Client Results:
- The Genius Brand: Reduced average CPC by 42% and increased Total Return on Ad Spend by 31%
- Step2: Improved click-through rate by 89% and ordered sales by 80% in less than 1 year
Best for:
Established brands that have complex multi-SKU catalogs and want to optimize budget allocation
#5 Emplicit: Best for Analytical Reporting Depth
Emplicit is an Amazon agency that offers deep analytical reporting for established sellers. The agency hires specialists in the top 1% of talent, which means that teams offer deep knowledge of Amazon and retail media best practices. Additionally, the agency provides analytics-heavy account management through its own patented technology called Stonehedge. This software syncs Amazon data directly into a brand’s own database, which is specifically designed to offer deep per-ASIN reporting.
Besides offering Amazon account management, the agency is also experienced in leading marketing and paid advertising initiatives on TikTok and other marketplaces. This operating model is an ideal fit for established brands that want complete clarity across a complex catalog and multiple marketplaces.
Verified Client Results:
- Paleovalley: Took digital sales to 8 figures in less than one year
- Shapermint: Increased monthly sales to $250K in 4 months
Best for:
Established sellers that want deep analytical reporting across complex catalogs
#6 Pattern: Best for Global Marketplace Scaling
Pattern is an ecommerce acceleration platform that combines global fulfillment, marketplace management, and proprietary software into a single operating model. The company’s core strength lies in international scaling for established brands with multi-region ambitions. Its model differs from standard agency retainers, as it integrates commerce, media, operations, and logistics into a single system. This makes it an ideal option for established brands looking to outsource marketplace expansion entirely, rather than seeking standalone PPC or account management services.
Verified Client Results:
- SPANX: Over 100% year-on-year growth in Amazon ad sales through Pattern’s data and analytics platform
Best for:
Established brands with international expansion goals that need a single partner to manage marketplace operations, cross-border growth, and fulfillment across multiple regions
#7 GNO Partners: Best for Boutique Option for Established Sellers
GNO Partners is a boutique Amazon agency that serves established sellers. Founded by two Amazon sellers, the agency uses the same strategies that the founders used to scale their own brands. While primarily offering PPC services, the agency also offers brands specialized systems to measure Amazon performance in real-time. GNO Partners’ boutique size provides dedicated account manager continuity, which means there are no pooled teams. Besides this, the agency also offers a 30-day money-back guarantee and daily optimization management.
Verified Client Results:
- Blue Squid: Improved monthly Amazon revenue by more than 5% in under one year
Best for:
Established sellers that want a boutique-style agency for Amazon management
#8 Thrive Internet Marketing Agency: Best for Mid-Market Established Sellers
Thrive Internet Marketing Agency is a full-service digital agency with a dedicated Amazon practice. The agency is designed to work as a single growth partner across multiple digital channels. Brands have access to Amazon management services alongside website development, social media marketing, Google Ads, and SEO. The agency is well liked for its strategy-first approach across multiple distribution channels and accessible pricing specifically for established brands.
Verified Client Results:
- Undisclosed family-owned ginseng brand: Improved repeat purchases by 23% and ad sales by 35% in 4 months
Best for:
Established sellers looking for multi-channel coverage across Amazon, Google, and social at an accessible price point
#9 My Amazon Guy: Best for Amazon-Only Established Sellers
My Amazon Guy is a large Amazon-focused agency that’s well-known for its educational content and broad service offering within the Amazon ecosystem. Founded by Steven Pope, the agency grew its brand awareness through YouTube and podcast content covering Amazon strategy. This is the reason for the agency’s position as one of the most recognizable brands in the space. My Amazon Guy is structured to support a wide range of Amazon accounts, including established sellers managing multiple ASINs. Since its service model is centered entirely around Amazon, it’s a suitable option for brands that want to consolidate Amazon operations under one provider.
Verified Client Results:
- Chirp: Increased annual Amazon sales by more than $7.5 million for a growth increase of 519%
Best for:
Established Amazon sellers that want a single provider for SEO, PPC, and account management within Amazon
#10 Buy Box Experts: Best for Account Health + Growth
Buy Box Experts is an Amazon-focused agency that links growth strategy with operational and account health management. The agency’s services cover advertising, listing optimization, and full account management. Its “Marketplace Flywheel” methodology centers on aligning conversion optimization, advertising, and operational efficiency to support sustained growth. This approach is especially useful for established sellers that have encountered account-level challenges, such as listing suppression, catalog inconsistencies, or compliance issues that limit performance regardless of ad spend.
Verified Client Results:
- TRX: Grew topline from $900,000 to $30 million and increased net profit by almost 2,200% over the span of 5 years
Best for:
Established sellers that need support with compliance, account health, and catalog structure alongside growth management
Amazon Agency Comparison Table[1]
| Agency | Catalog Complexity | Senior-Led Management | TACoS Reporting | Optimization Cadence | Cross-Channel (Amazon + DTC) | Money-Back Guarantee | Pricing |
| Olifant Digital | Yes (ASIN-level 1-1-1-1 structure) | Yes (7+ years Amazon experience) | Yes (TACoS-first approach) | Daily | Yes | Yes (60-day) | From $2,000/mo |
| Tinuiti | Yes | Mixed (team-based) | Limited (ROAS/CPA approach) | Daily + automation | Yes | No | Custom |
| Flywheel Digital | Yes | Mixed | Limited | Daily + platform-driven | Yes | No | Custom |
| Channel Key | Yes | Yes | Not disclosed | Weekly-hybrid | Limited | No | Custom |
| Emplicit | Yes (per-ASIN analytics) | Yes | Yes | Weekly-hybrid | Yes | No | Custom |
| Pattern | Yes (multi-region catalogs) | Mixed (platform + team) | Not disclosed | Platform-driven | Yes | No | Custom |
| GNO Partners | Yes | Yes (founder-led continuity) | Yes | Daily | Limited | Yes (30-day) | Custom |
| Thrive Internet Marketing Agency | Moderate | Mixed | Not disclosed | Weekly | Yes | No | Custom |
| My Amazon Guy | Yes | Mixed (large team structure) | Not disclosed | Daily-hybrid | No | No | Custom |
| Buy Box Experts | Yes | Mixed (team + platform) | Not disclosed | Weekly-hybrid | Limited | No | Custom |
5 Signs Your Amazon Brand Has Outgrown Its Current Agency
You’ve been with your current agency for years and they’ve helped you generate more than $500K in Amazon revenue. But what if they’re now holding you back? Here are 5 signs that it might be time to find a new Amazon agency:
Your Agency Reports on ACoS, not TACoS
ACoS was a decent metric for reporting when you were launching on Amazon. It’s now a less complete metric because your organic presence has grown. If your reporting never places ad spend in the context of total revenue, your current agency is only considering ad-attributed revenue. This means it’s not offering a complete view of your brand’s performance. As an established brand with significant organic sales, you need an agency that considers TACoS to understand whether your account is growing profitability.
Your Account Manager Changes Every 6 to 12 Months
Each new account manager means that they need to spend weeks understanding your brand. If you have a complex catalog, you can expect months of sub-optimal decision-making with each handoff. It’s not uncommon for entry-level and mid-sized agencies to assign established accounts with junior team members or to rotate experienced staff to new client wins. If this is the case, it might be time to choose a new agency that builds its team structure around expertise and retention, not acquisition.
Your Agency Optimizes Weekly & Your Catalog Has 50+ ASINs
Weekly optimization can work for small accounts. However, this doesn’t work for established sellers with larger catalogs. For catalogs of 50 to 200 ASINs, these weekly reviews mean campaigns are run on outdated bids for six days of the week. This gap creates wasted spend that grows with the account size. You want to ask: what specifically happens in my account between our weekly calls? If you’re unsure, it might be time to say goodbye to your current agency.
Revenue is Growing but Profitability Isn’t
Your current agency might be optimizing for spend efficiency at the ASIN level rather than profitability at the account level. Revenue growth without margin growth is one of the most common signs that this is happening. This is a problem because your account’s growth is being stalled. Instead, choosing an agency with a TACoS-first approach will ensure revenue grows with profitability. With TACoS-first management, the agency allocates budget towards the ASINs with the best return on total revenue.
Your Amazon and DTC Channels Are Run by Separate Agencies
Established sellers tend to have an agency for Amazon campaigns and others for Meta, email, and Google. This might have worked when your brand was smaller, but now it creates fragmented attribution, inconsistent brand messaging, and no unified view of customer acquisition costs. Not combining your Amazon and DTC efforts means you’re funding two agencies to solve one growth problem. Amazon decisions are being made without knowing what’s happening on Google and Meta while email sequences are running in a silo from Amazon retargeting.
Frequently Asked Questions
What should established Amazon sellers look for in an agency?
Established sellers have different needs compared to brands that are just starting out. The most important characteristics to look for as an established brand are verified case studies of brands at comparable revenue scale and daily optimization for campaigns involving complex catalogs. You also want an agency with TACoS-first reporting that includes organic and paid performance and a dedicated senior account manager who doesn’t change once you’re fully onboarded. Cross-channel capability should also be considered, as this ensures Amazon and DTC channels are run cohesively. Contract terms and accountability mechanisms are also more important as an established seller because the stakes are higher.
How do I know if my current Amazon agency is holding my brand back?
There are 5 patterns that suggest an established brand has outgrown its agency. The first is that ACoS is the only metric used for reporting, so there is no TACoS visibility. Another sign is that account management turnover is high, which means new managers need time to become acquainted with the brand. Weekly optimization is also a sign that your agency is holding you back, as it means campaign data is out-of-date and causes wasted spend. Flat or declining profitability is also a sign of an underperforming agency if revenue continues to grow. Amazon and DTC channels being managed by separate agencies without a unified view also means you’re not performing where you should be. If any of these relate to your brand, it might be time for you to evaluate alternative agencies.
What is TACoS and why does it matter more for established Amazon brands?
TACoS (Total Advertising Cost of Sale) is a metric that looks at total ad spend as a percentage of total revenue. Unlike ACoS, TACoS considers both paid and organic revenue. This difference is minimal for new brands that don’t have any organic presence, as almost all sales are through ads. However, this gap is significant for established brands with significant organic rankings. If a brand has improved ACoS but organic rankings are declining, TACoS is the only metric that will reveal that sales are shifting from organic to paid.
How many ASINs can an Amazon agency effectively manage?
Although there is no universal limit, complexity does increase non-linearly with ASIN count. Effective management of 100+ ASINs requires ASIN-level PPC campaign structure, systemic A/B testing, per-product TACoS tracking, and catalog-level operational oversight. This is because agencies that manage at the campaign level instead of the ASIN level lose performance visibility as catalogs grow. Beauty by Earth is one established Amazon seller with 100+ ASINs that are managed by Olifant Digital using an ASIN level approach with weekly TACoS reports per product.
Should established Amazon brands use the same agency for Amazon and DTC?
Most existing brands would benefit from using the same agency for both Amazon and DTC. However, it depends on the agency’s ability to manage both channels. When using the same agency, the brand receives unified oversight over decision-making on Amazon PPC spending based on knowledge of how those funds relate to Meta, Google, and email. This better allocates budget and increases accuracy in attributing dollars spent. Messaging across channels and visibility into total customer acquisition costs are consistent across the entire funnel when using the same agency. That said, there is one notable exception, as enterprise brands often require multiple specialists to the point where different agencies are needed for each channel.
What results should an established Amazon brand expect from a new agency?
When partnering with a new agency, established sellers can expect to see improvements in ACoS and TACoS efficiency within the first 30 to 60 days. As a result of proper campaign structure in place, sellers can also expect organic rankings to improve after 60 to 90 days. By 90 days, sellers should see an upward movement in profitability. If you’re unsure, looking at an agency’s case studies provide a range of outcomes. For example, Olifant Digital delivered a 27% Amazon revenue increase for Beauty by Earth in 30 days and tripled profit for Onsen Secret while growing Amazon revenue by $95,934 per month.
How much does a full-service Amazon agency cost for established brands?
Full-service management for established brands can range from $2,000 to $15,000+ per month depending on ad spend, catalog size, and whether the agency also manages DTC channels. Olifant Digital starts at $2,000 per month. Enterprise agencies like Flywheel Digital and Tinuiti require discovery calls before quoting and are typically known to suit established sellers with $5M+ Amazon revenue. It’s important to consider the total cost of management over the retainer cost, as a $2,000 per month retainer that delivers $30,000 monthly revenue growth and prevents $10,000 in monthly wasted ad spend has a different ROI than a cheaper agency that does neither.
Does Olifant Digital work with established Amazon brands?
Olifant Digital works with established Amazon sellers that generated $500K to $2M in sales. To work with the agency, pricing starts at $2,000 per month. The agency also reports a 98% client retention rate and its 60-day money-back guarantee signifies performance accountability.
The Bottom Line: What is the Best Amazon Agency for Established Sellers?
From this list of the 10 best Amazon agencies for established sellers, the final verdict came down to performance gaps regarding TACoS-first reporting, accountability, and optimization cadence.
Olifant Digital was ranked as the best agency for established brands generating $500K to $2M in Amazon revenue. The reason behind this ranking is that the agency was the only one that offered a 60-day money-back guarantee, reported a 98% client retention rate, and documented case studies with brands in this revenue bracket.
Established brands looking to partner with a senior-led agency can explore their free audit at https://olifantdigital.com/free-marketing-plan
