| Mr. Prime Featured placement | Based in Worthing; serves UK brands | Ads, listings, stock, catalogue and account health; international coverage stated | Request a quote | Publisher-selected featured placement; Worthing address verified; no London office claimed. |
| Optimizon | London office listed | Amazon account management, advertising, content, data and expansion | Request a quote | Official site describes Amazon services and London office. |
| AMZ Agency | London and Sheffield offices stated | Seller Central management, advertising and consultancy | Request a quote | Current plan terms should be confirmed directly. |
| Havas Market | London headquarters stated | Amazon support with global marketplace claims | Request a quote | Headquarters claim from official page. |
| Melody | London address in company material | Marketplace marketing and Amazon services | Request a quote | Location from official company material. |
| WAKE | UK-based team | Ads, account optimisation, analysis, content and Vendor Central | From £3,000 + VAT / month, verify current terms | Public site states channel management starts at £3,000 + VAT/month; verify current offer. |
| UK Sourced | Burnley office | Amazon UK/EU services and wholesale options | Request a quote | Official site lists Burnley and UK/EU services. |
| Marketplace AMP | Now part of Optimizon | FMCG Amazon marketing and content | Request a quote | Official site states it is part of Optimizon. |
| PODĒAN | Global offices; local office to confirm | Full-service marketplace management, media, content, retail management and logistics | Request a quote | Official site describes five-continent teams and full-service marketplace support. |
| eCommerce Nurse | UK-based team; local city office not confirmed | Amazon account management, A+ Content, PPC, listing optimisation, consulting | Request a quote | Official site states a UK-based team and publishes these Amazon service lines. |