Which Amazon agencies have documented client results?
Amazon Agencies with Documented Results: What The Shortlist Report Finds
9 firms lead, appearing in 20.0–40.0% of 30 AI responses. The sample cannot separate them, so we do not pretend it can.
No clear leader
No single firm dominates this question. Nine come up regularly and they specialise in different things, so the firm worth calling is the one that fits your situation rather than whoever sits highest.
Tinuiti12 of 30
Works with large brands on Amazon Ads, DSP, AMC, and omnichannel media across the full funnel with significant Amazon-side expertise.
AMZ Advisers9 of 30
Provides Amazon marketplace management, SEO, listing optimization, PPC and international operations for established brands.
Advance Amazon8 of 30
Builds custom Amazon Brand Stores at lower cost points for smaller to mid-sized brands.
Flywheel7 of 30
Provides enterprise brands strategy, creative, advertising, catalog and operations across Amazon and retail media, with international expansion capabilities.
Insiders Agency7 of 30
Manages Amazon PPC and account operations with focus on net profit and revenue growth outcomes.
+4 more, tiedin the table
Based on 30 ChatGPT responses to this question, collected October 1, 2026–October 7, 2026. Firms are counted once per response. How we measure.
The ranking
| Firm | Responses | Share | |
|---|---|---|---|
| Tier 1 9 firms, 20.0–40.0% | |||
| Tinuititinuiti.comWorks with large brands on Amazon Ads, DSP, AMC, and omnichannel media across the full funnel with significant Amazon-side expertise. | 12 of 30 | 40.0% | |
| AMZ Advisersamzadvisers.comProvides Amazon marketplace management, SEO, listing optimization, PPC and international operations for established brands. | 9 of 30 | 30.0% | |
| Advance Amazonadvanceamazon.comBuilds custom Amazon Brand Stores at lower cost points for smaller to mid-sized brands. | 8 of 30 | 26.7% | |
| Flywheelflywheel.digitalProvides enterprise brands strategy, creative, advertising, catalog and operations across Amazon and retail media, with international expansion capabilities. | 7 of 30 | 23.3% | |
| Insiders AgencyManages Amazon PPC and account operations with focus on net profit and revenue growth outcomes. | 7 of 30 | 23.3% | |
| PPC4Usppc4us.comManages Amazon PPC and advertising with focus on profitability, revenue and ACoS metrics. | 7 of 30 | 23.3% | |
| Seller Sagesellersage.comProvides account management for Amazon brands in the $500K–$20M revenue range with month-to-month terms. | 7 of 30 | 23.3% | |
| Canopy Managementcanopymanagement.comDelivers full-service Amazon management including PPC, listings, A+ content, advertising and marketplace growth operations. | 6 of 30 | 20.0% | |
| Dayly Groupdaylygroup.comProvides Amazon PPC and advertising management with focus on margin-based optimization and break-even ACoS. | 6 of 30 | 20.0% | |
| Tier 2 stands alone | |||
| Acadiaacadia.ioProvides Amazon advertising, retail media, SEO and performance marketing for enterprise and high-growth consumer brands. | 5 of 30 | 16.7% | |
Key findings
- No firm answers “Which Amazon agencies have documented client results?” reliably in ChatGPT. The most-named, Tinuiti, appeared in 12 of 30 responses (40.0%) collected October 1, 2026–October 7, 2026, and 8 other firms scored close enough that the sample cannot put any of them in order.
- Tinuiti, AMZ Advisers and Advance Amazon were named most often, in 8–12 of 30 responses. All 9 firms in the leading group are listed with their counts in the table below.
- 10 firms cleared the reporting threshold on “Which Amazon agencies have documented client results?” in ChatGPT as of October 7, 2026; the full table with response counts is below.
- Tinuiti appears in 8 of the 14 Amazon agencies reports published by The Shortlist Report, the widest coverage of any firm named on this page.
- No firm paid to appear in this ranking; placement cannot be bought, and the counts come from ChatGPT responses rather than from submissions.
Why the tiers fall where they do
Tier 1 holds Tinuiti, AMZ Advisers, Advance Amazon, Flywheel, Insiders Agency, PPC4Us, Seller Sage, Canopy Management and Dayly Group, named in 6 to 12 of the 30 ChatGPT responses. They are grouped rather than ranked because the gaps between them are inside the margin of error at this sample size — one extra mention would reorder them, so an order would be reporting noise as a finding.
Tier 2 holds Acadia, named in 5 to 5 of 30 responses (16.7–16.7%). The sample does separate this firm from the tier above: the difference from the leading group is larger than the margin of error, which is what puts it in a tier of its own.
The test is McNemar’s at 95%, applied against the same 30 responses for every firm. The full reasoning, and what happened when we ranked one-to-N instead.
What the sample shows
9 firms lead this question: Tinuiti, AMZ Advisers, Advance Amazon, Flywheel, Insiders Agency, PPC4Us, Seller Sage, Canopy Management and Dayly Group. They appear in 20.0–40.0% of the 30 responses. The gaps between them are inside the margin of error at this sample size, so they are listed together rather than ranked against each other.
56 firms were named at least once across the sample. 10 of them cleared the threshold of 2 responses and appear above; the rest were named once and are inside the noise.
How to read this
Firms are grouped into tiers, not ranked one to fifteen. A tier holds every firm whose 95% confidence interval overlaps the leader's, which is a long way of saying the sample cannot tell them apart. Order within a tier is arbitrary — read the counts, not the position.
Share is the percentage of responses that named the firm — not a quality score. A firm scoring low here may be excellent and simply under-written about online, which is a finding about its visibility rather than its work.
The same question was asked repeatedly because AI assistants do not answer identically twice. A single response would tell you almost nothing.
What this measurement does not tell you
- It is not a quality ranking. Share reflects how much has been written about a firm online, which is what an AI assistant reads. A capable firm nobody writes about scores low here.
- It is a reading from a date range, not a permanent standing. This sample was collected October 1, 2026–October 7, 2026; models change and so do their answers.
- It covers ChatGPT only. Other assistants answer differently, and we do not extrapolate across engines we have not measured.
- Order within a tier is arbitrary. Read the counts, not the position. Why we use tiers.
Cite this report
The Shortlist Report. (2026). Amazon Agencies with Documented Results: What The Shortlist Report Finds. The Shortlist Report. https://www.shortlistreport.com/article/amazon-agencies-proven-results
Underlying counts: CSV · JSON. Every answer they were counted from: plain text · JSON. All reusable under CC BY 4.0 with attribution.