| Affilibyte Limited | Leigh-On-Sea | 2025 |
| Affilidojo Ltd | London | 2022 |
| Affilink Ltd | Kidderminster | 2024 |
| Affilio Ltd | Hove | 2018 |
| Affilion Ltd | Suffolk | 2024 |
| Affilipay Limited | London | 2021 |
| Affiliscan Ltd | London | 2026 |
| Affilius Group Limited | Manchester | 1990 |
| Affilius Limited | Accrington | 2013 |
| Affine Films Ltd | Littlehampton | 2023 |
| Affineti Limited | Chipping Norton | 2009 |
| Affinex Internationals Ltd | Kirkcaldy | 2025 |
| Affini Technology Limited | West Drayton | 2002 |
| Affinitas Global Ltd | Peterborough | 2015 |
| Affinitas Information Technology Limited | Enniskillen | 2021 |
| Affinitas IT Limited | Mildenhall | 2018 |
| Affinitext (UK) Limited | Chatham | 2010 |
| Affiniti AI Limited | London | 2020 |
| Affiniti Digital Media Limited | Croydon | 2004 |
| Affiniti Group Ltd | Horsham | 2022 |
| Affiniti Hive Limited | London | 2024 |
| Affiniti Integrated Solutions Ltd. | East Yorkshire | 1993 |
| Affiniti Networks (NE) Limited | Houghton Le Spring | 2015 |
| Affinitive AV Limited | Marlow | 2015 |
| Affinitus Group Limited | Lichfield | 1991 |
| Affinity Analysis Consulting Ltd | Harefield | 2022 |
| Affinity Application Software Ltd | Wigan | 2026 |
| Affinity Business Consulting Ltd | Hayling Island | 2010 |
| Affinity Business Limited | Durham | 2023 |
| Affinity Confidential Ltd | London | 2025 |
| Affinity Creates Limited | Hassocks | 2025 |
| Affinity CRM Consultants Ltd | Port Talbot | 2016 |
| Affinity Data Solutions Limited | London | 2018 |
| Affinity Digital (Technology) Limited | Guildford | 2004 |
| Affinity Digital Ltd. | Leeds | 2017 |
| Affinity Editorial Limited | Stoke-On-Trent | 2021 |
| Affinity Ehealth Ltd | Woodford Green | 2019 |
| Affinity ERP Ltd | Motherwell | 2022 |
| Affinity Financial Network U.K. Limited | Southampton | 2002 |
| Affinity Group Holdings Limited | Norwich | 2017 |
| Affinity Guard Ltd | London | 2020 |
| Affinity Healthcare Consulting Limited | London | 2026 |
| Affinity IT Services Limited | Sheffield | 2006 |
| Affinity Labs Ltd | Ruislip, | 2025 |
| Affinity Media Group Ltd | Cramlington | 2020 |
| Affinity Media NE CIC | Gateshead | 2019 |
| Affinity Media Production Ltd | London | 2023 |
| Affinity Media UK Limited | London | 2004 |
| Affinity Network Solutions Limited | Preston | 2017 |
| Affinity Networks Ltd | London | 2022 |
| Affinity Pro Limited | Reigate | 2015 |
| Affinity Records UK Ltd | Bournemouth | 2019 |
| Affinity Reply Limited | London | 2010 |
| Affinity Resource Group Limited | Potters Bar | 2015 |
| Affinity Sales Ltd | Crawley | 2016 |
| Affinity Services Group Limited | London | 2016 |
| Affinity Smart Limited | Wembley | 2003 |
| Affinity Software Limited | Orpington | 2023 |
| Affinity Solutions Group Ltd | London | 2020 |
| Affinity Sphere Limited | Leighton Buzzard | 2024 |
| Affinity Systems & Development Limited | Orpington | 1998 |
| Affinity Talent Group Ltd | Orpington | 2019 |
| Affinity Technical Services Ltd | Macclesfield | 2011 |
| Affinity Technology Solutions Limited | Manchester | 2020 |
| Affinity Twin Limited | Barnet | 2021 |
| Affinityiq Ltd | Rugeley | 2025 |
| Affinityloop Ltd | London | 2026 |
| Affinitysolutionuk Ltd | Pinner | 2026 |
| Affinus Holdings Limited | Newton Abbot | 2015 |
| Affinus Limited | Newton Abbot | 2007 |
| Affios Ltd | Kingston Upon Thames | 2018 |
| Affirm IT Limited | Milton Keynes | 2010 |
| Affirm IT Services Ltd | Heanor | 2017 |
| Affirma Consulting Ltd | Oxfordshire, Oxford | 2023 |
| Affirmable Limited | London | 2022 |
| Affirmation Entertainment Ltd | Hornchurch | 2023 |
| Affirmative Consultants Limited | Nottingham | 2008 |
| Affirmed Networks UK Limited | London | 2011 |
| Affirmed.Io Ltd | London | 2025 |
| Affirmfirst Limited | Macclesfield | 2015 |
| Affirmit Servicing UK Ltd | London | 2020 |
| Affivo Finance Limited | Dundee | 2024 |
| Affix Space Ltd | London | 2020 |
| Affix Studio Limited | London | 2023 |
| Affixer Ltd | London | 2018 |
| Affixxius Limited | Loughborough | 2021 |
| Affizer Ltd | Southampton | 2025 |
| Afflatech Limited | Folkestone | 2013 |
| Affle (UK) Ltd. | London | 2010 |
| Afflora Labs Ltd | London | 2025 |
| Affluence Digital Media Group Ltd | London | 2024 |
| Affluence Group Ltd | Liverpool | 2022 |
| Affluencex Limited | London | 2024 |
| Affluenda Ltd | London | 2025 |
| Affluent Consultancy Ltd | Coventry | 2008 |
| Affluent Infosoft Limited | Rugby | 2020 |
| Affluent Sites Ltd | Rochdale | 2020 |
| Affluent Technologies Limited | Wokingham | 2019 |
| Affluent Technology Limited | Coventry | 2008 |
| Afflutech Limited | Suffolk | 2024 |