A list of Siteimprove's UK customers, presented by region, including over 40% of the nation's local councils.

Greater London

• Bexley Council
• British Broadcasting Corporation (BBC)
• British Library
• Bromley London Borough Council
• Camden Borough Council
• CIMA Global
• COI News Distribution Service
• Cox and Kings Travel
• Department for Business, Enterprise & Regulatory Reform
• Department for International Development
• Dept for Culture Media & Sport
• DX Media
• Financial Ombudsman Service
• Food Standards Agency
• Formula Digital Ltd
• Greenwich Borough Council
• Government Offices for the English Regions
• Havering London Borough Council
• Head London Ltd
• Hounslow London Borough Council
• Integer Research
• Islington Council
• Kensington and Chelsea TMO Ltd.
• Lewisham London Borough Council
• London Borough of Barking & Dagenham Council
• London Borough of Barnet
• London Borough of Merton
• London School of Economics and Political Science
• National Portrait Gallery
• Office of Gas and Electricity Markets
• Screen Digest
• Science and Technology Facilities Council
• Sony Entertainment Europe
• Strand Palace Hotel and Restaurants Ltd
• Sutton London Borough Council
• UK Sport
• VT Communications
• Wandsworth Borough Council
• Youth Justice Board for England and Wales

South East England

• Adur District Council
• Basingstoke & Deane Borough Council
• Bracknell Forest Borough Council
• British Car Auctions Ltd
• Buckinghamshire County Council
• Byte-Vision Ltd
• CALDES.COM Ltd
• Chichester District Council
• Civil Aviation Authority
• Compliance Online Ltd
• ContractorFinancials
• Crawley Borough Council
• Dover District Council
• East Sussex County Council
• Eastbourne Borough Council
• Eastleigh Borough Council
• Elmbridge Borough Council
• Epsom & Ewell Borough Council
• FranklinCovey Europe Limited
• Guildford Borough Council
• Hampshire County Council
• Havant Borough Council
• Horsham District Council
• i-neda
• KBC Process Technology Ltd
• Letraset Ltd.
• Lewes District Council
• National Perinatal Epidemiology Unit (Oxford University)
• Netbasic Ltd
• NPEU
• Oxfordshire County Council
• Portsmouth City Council
• Reigate & Banstead Borough Council
• Royal Naval Museum
• Rushmoor Borough Council
• Sevenoaks District Council
• Shepway District Council
• South Bucks District Council
• Stevenage Borough Council
• Surrey County Council
• Surrey ePartnership
• Surrey Heath Borough Council
• Tandridge Distict Council
• Test Valley Borough Council
• Tonbridge & Malling Borough Council
• Tunbridge Wells Borough Council
• University of Brighton
• VIEWLONDON
• Volvo Event Management
• Waverley Borough Council
• West Oxfordshire District Council
• West Sussex County Council
• Woking Borough Council
• Worthing Borough Council
• WStore UK Ltd
• Wycombe District Council

South West England

• Bath and North East Somerset Council
• Borough of Poole Council
• Bristol City Council
• Cornwall County Council
• Cotswold District Council
• Dorsetforyou.com
• Exeter City Council
• My Single Friend Ltd
• Natural Environment Research Council
• Network Solutions
• North Somerset Council
• Plymouth City Council
• PSU TECHNOLOGY GROUP LTD
• Purbeck District Council
• RIAS Plc.
• Royal National Lifeboat Institution
• Social Care Institute for Excellence
• Somerset County Council
• South Hams District Council
• Stroud District Council
• The Consortium
• West Somerset District Council
• Weymouth & Portland Borough Council
• Wiltshire County Council

West Midlands

• Birmingham City Council
• Bosch Thermotechnology Ltd
• Coventry City Council
• Dudley Metropolitan Borough Council
• Mi Limited
• National Grid
• Nuneaton & Bedworth Borough Council
• N5 Ltd
• North Warwickshire Borough Council
• Office of Water Services (OFWAT)
• Plumbworld
• Redditch Borough Council
• Royal Doulton (UK) Limited
• Rugby Borough Council
• Sandwell Metropolitan Borough Council
• Shropshire Council
• Solihull Borough Council
• Stoke on Trent City Council
• Stratford-on-Avon District Council
• Tamworth Borough Council
• The Phone Unlockers.com
• Three Rivers District Council
• Walsall Council
• Warwick District Council
• West Mercia Supplies
• Wolverhampton City Council

North East England

• Durham County Council
• Granada Learning
• Middlesborough Borough Council
• University of Sunderland

North West England 

• AJ Bell
• Allerdale Borough Council
• Barrow-in-Furness Borough Council
• Blackburn with Darwen Borough Council
• Blackpool Borough Council
• Bolton Metropolitan Borough Council
• Carlisle City Council
• Cheshire East Council
• Cheshire Police Authority
• Copeland Borough Council
• Cumbria County Council
• Eden District Council
• Flowers Direct
• Freeman Jones Ltd.
• General Medical Council
• Halton Borough Council
• Health and Safety Executive
• Lancashire County Council
• Lifestyle Services Group Ltd
• Manchester Art Gallery
• Manchester City Council
• Orbis Monitoring Services Ltd
• Salford City Council
• South Lakeland District Council
• St Helens Council
• Stockport Metropolitan Borough Council
• University of Central Lancashire
• Warrington Borough Council
• West Lancashire Council
• Wigan & Leigh College
• Wigan Council

Yorkshire and Humber

• Bradford City Council
• Calderdale Borough Council
• Hambleton District Council
• i-to-i uk ltd
• Leeds Council
• Lincolnshire County Council
• North Kesteven District Council
• North Lincolnshire Council
• North Yorkshire County Council
• Richmondshire District Council
• Rotherham MBC
• Scarborough Borough Council
• Sheffield City Council
• Wakefield Metropolitan District Council
• West Lindsey District Council
• West Yorkshire PTE

East Midlands

• Academic Answers
• Bassetlaw District Council
• Blaby District Council
• Broxtowe Borough Council
• Daventry District Council
• Derby City Council
• East Lindsey District Council
• East Northamptonshire District Council
• Gedling Borough Council
• Jigsaw Systems LTD
• North East Derbyshire District Council
• Northamptonshire County Council
• South Holland District Council
• South Kesteven District Council
• South Northamptonshire Council
• University Hospitals Leicester NHS Trust

East of England

• Babergh District Council
• Basildon District Council
• Bedfordshire County Council
• Braintree District Council
• Brentwood Borough Council
• Broadland District Council
• Cambridgeshire County Council
• Central Bedfordshire Council
• Chelmsford Borough Council
• Colchester Borough Council
• East Cambridgeshire District Council
• Epping Forest District Council
• Fenland District Council
• Forest Heath District Council
• Harlow Council
• Hertsmere Borough Council
• Huntingdonshire District Council
• Institute of Customer Service
• Ipswich Borough Council
• Laptopshop IT Ltd
• Moneyfacts Group plc
• Norfolk County Council
• North Norfolk District Council
• One Suffolk Portal
• South Cambridgeshire District Council
• St. Edmundsbury Borough Council
• Suffolk Coastal District Council
• Suffolk County Council
• Watford Borough Council
• Waveney District Council
• Welwyn Hatfield Council

Scotland

• Angus Council
• Aberdeen City Council
• Aberdeenshire Council
• Clackmannanshire Council
• East Dunbartonshire Council
• East Renfrewshire Council
• Fife Council
• General Teaching Council for Scotland
• GHA
• Glasgow Housing Association
• Midlothian Council
• Moray Council
• National Library of Scotland
• Perth & Kinross Council
• Renfrewshire Council
• Scottish Arts Council
• Scottish Legal Aid Board
• Scottish Water
• South Lanarkshire Council
• The Highland Council
• The Improvement Service

Northern Ireland

• GCD Technologies
• N Ireland Local Government Officers Superannuation Committee
• North Down Borough Council

Wales

• Conwy County Borough Council
• Denbighshire County Borough Council
• Flintshire County Borough Council
• Isle of Anglesey County Borough Council
• Rhondda Cynon Taf CBC
• Turn2Us
• Welsh Assembly Government
• Wrexham County Borough Council

Isle of Man

• Isle of Man Department of Tourism