Rank Company Location Year end Annual sales rise over 3 years Latest sales £000s Staff Comment
1 Cambridge Broadband NetworksWireless technology developer Cambridge 2003 599.68% 5,309 49 Raised £25m to install wireless broadband systems in China
2 Vibrant MediaMedia software developer Central London 2003 405.48% *2,872 26 Claims online advertising software generates 3m click-throughs a month
3 PelikonLuminescent display maker Cardiff 2003 398.21% 4,443 40 Has sold more than 1m displays for universal remote control
4 Blue Anvil TechnologiesIT consultancy Staffordshire 2003 329.91% 2,907 45 Started in a spare room with a £1,900 loan
5 InforMed DirectPharmaceutical software provider Cheshire 2003 322.00% 2,567 25 Founders put aside 25% of shares to found an educational charity
6 Electronic Direct ResponseDigital marketing company Central London 2003 308.94% 2,184 8 Claims that its databases contain e-mail addresses of 5m consumers
7 Active HotelsOnline hotel marketer Cambridge 2003 305.74% *7,169 43 Acquired by US-based priceline.com for a reported £90m in September
8 TradingPartnersOnline commodity auctioneer Central London 2003 271.75% 1,560 25 Runs commodity auctions online for the likes of JCB and the NHS
9 ServistaManaged services provider Central London 2003 268.88% 6,325 42 Service enables Lloyds TSB to sell gas, electricity and telephony
10 ProvisDisposable contact-lens maker Glasgow 2003 265.45% 2,316 94 Claims to have invented the one-day disposable contact lens
11 IncaIndustrial printer maker Cambridge 2003 254.72% 11,296 83 Sells outsized ink-jet printers at average price of £300,000 each
12 FlytxtMobile technology provider Central London 2003 236.27% 2,254 33 Manages the technology for Orange Wednesdays’ cinema ticket promotion
13 BoltblueMobile services provider Central London 2003 235.00% 3,767 25 Claims to sell games, logos and ring tones to 9m mobile-phone users
14 PIPS TechnologyCamera manufacturer Hampshire 2003 232.43% 4,272 25 Software recognises numberplates and checks them against stolen-car data
15 MediaburstCommunications service provider Manchester 2003 230.73% *†1,486 16 Software used by O2 for its business text messaging product
16 EurofficeOffice products retailer Central London 2003 201.25% 4,468 13 Sells office stationery online to 45,000 small and medium-sized businesses
17 CorelogicSocial-care software developer Central London 2003 198.12% 1,379 14 Co-founder kept the day job while writing software in the evenings
18 TransitiveSoftware developer Manchester 2003 186.43% 3,207 61 Spun out of Manchester University and has raised £8m in venture capital
19 Onyx ScientificPharmaceutical researcher Sunderland 2003 179.52% 2,239 35 Supplies top pharmaceutical companies with chemicals to research drugs
20 EMS (European)Motor control manufacturer Walsall 2003 177.81% 1,478 12 Technology cuts running cost of fridges at Pizza Hut by 25%
21 Ashton Court GroupIT consultancy Northampton 2003 177.64% 2,639 24 Customised Microsoft software for Amnesty International and Carbon Trust
22 Astex TherapeuticsDrug developer Cambridge 2003 169.89% *2,699 92 Is developing next-generation drugs for cancer and Alzheimer’s
23 JumarIT consultancy Solihull 2003 168.63% 3,206 7 Develops software that automatically updates old ‘green screen’ systems
24 2HelixAnalytical software developer Central London 2003 167.15% 3,994 30 Software enables NTL to analyse network data to increase sales
25 OptosRetinal scanning developer Dunfermline 2003 166.04% 8,921 132 Son’s blindness led father to design new eye-scanning technique
26 Insurancewide.comInsurance portal operator Central London 2003 163.73% 1,650 6 Ebay, MSN and Ask Jeeves use its insurance-services software
27 GlueIT consultancy Buckinghamshire 2003 161.00% 14,940 84 Claims to have more than 40 customers, including Kraft and Argos
28 epyxE-trading platform developer Coventry 2003 151.18% 3,219 56 Says it accounts for 85% of DVLA’s online road tax renewals
29 AdeptraManaged services provider Reading 2003 150.94% *1,390 30 Claims to help protect 100m credit cards from fraudulent use
30 nFocusIT testing consultancy Wolverhampton 2003 150.92% 1,028 7 Tests web pages built using Microsoft’s new .NET framework
31 Moneysupermarket.comFinancial website operator Wales 2003 148.97% *38,143 209 Claims website receives 10,000 credit-card and loan applications daily
32 Iglu.comOnline travel agency SW London 2003 147.53% 16,420 63 Founder started firm while finishing his MBA at London Business School
33 KeycomTelecoms services provider Stafford 2003 145.05% 1,463 48 Claims to supply 50,000 student bedrooms with internet services
34 Centennial SoftwareTracking software developer Swindon 2003 143.93% 4,669 25 Says its software is used in 43 countries by 2,500 customers
35 DatingDirect.comDating website operator Birmingham 2003 141.63% *5,320 15 Founder started business with simple web-design kit from Dixons
36 ComplinetCompliance software developer SW London 2003 128.79% 4,087 80 Software helps banks to check client lists for terrorists
37 SealedMediaSecurity software developer Beaconsfield 2003 127.83% 1,496 41 US Congress used document security software after 2001 anthrax attack
38 SPILaser developerf Southampton 2003 127.58% *1,010 65 Develops powerful lasers in optical fibres the width of a human hair
39 KVSEmail storage manager Berkshire 2003 123.47% *13,644 134 Software helped Somerfield recoup £120,000 worth of lost invoices
40 AbcamOnline antibodies supplier Cambridge 2003 120.67% 3,504 26 Sells 10,000 antibodies online for the human genome project
41 COR Financial SolutionsFinancial software developer Central London 2003 120.13% *9,430 132 Claims to sell software to 220 financial institutions worldwide
42 Azzurri CommunicationsTelecoms services provider Walsall 2003 118.73% 46,711 368 Has acquired 11 companies to provide telecoms to blue chips such as B&Q
43 Empower InteractiveWireless messaging provider Central London 2003 115.93% *3,021 49 Text-messaging technology used by BBC for national IQ testing show
44 Z-TechControl systems developer Cambridgeshire 2003 114.37% 1,009 20 Designs industrial systems for the likes of RAF, Thames Water and Glaxo
45 iOraNetwork software developer Basingstoke 2003 112.62% *1,015 24 Software updates vast amounts of data for US Navy ships over satellite
46 Adastra SoftwareHealthcare software developer Ashford 2003 108.82% 4,960 70 Software logs and controls out-of-hours calls to GP surgeries
47 SurfKitchenTelecoms software developer Reading 2003 107.62% *1,336 60 Designs a PC-like interface for mobile phones for clients including O2
48 Acoustic SolutionsConsumer electronics supplier Northamptonshire 2003 107.04% 16,037 30 Designs Pop Idol karaoke machines under licence from the hit TV show
49 ComtecTravel software developer South Wales 2003 104.05% 6,034 83 Develops travel software for Thomas Cook, Lunn Poly and MyTravel
50 Enable InternationalManagement software developer Stratford-upon-Avon 2003 99.82% *1,009 12 Founders met at local flying club when learning to fly a helicopter
51 Zen InternetInternet services provider Rochdale 2003 99.63% 7,809 50 Supplies Umbro and Sony Europe with broadband connections
52 Digital StepsBusiness software developer Guildford 2003 97.12% 2,401 22 Developed software to help Health Professions Council track its members
53 ArgogroupTesting software developer Surrey 2003 95.75% 1,468 22 Claims to save a man-year of productivity for AT&T in the US every month
54 ImpartaBusiness trainer Southwest London 2003 94.70% 2,395 25 Offers interactive software to train sales and marketing staff at blue chips
55 QuicksilvaIT systems integrator Wiltshire 2003 90.23% 1,273 21 Builds CRM software for British government departments and blue chips
56 TrakwareData-capture software developer Redditch 2003 87.34% 1,502 5 Software used on handheld barcode scanners for clients such as Morrisons
57 TrayportTrading software developer SE London 2003 85.06% 3,717 21 Claims that 4,000 trading screens worldwide use its software
58 UniServitySoftware service provider Reading 2003 84.74% 1,221 21 Claims that 7% of English secondary schools are customers
59 ClarityBlueCRM software developer Luton 2003 83.52% 11,485 50 Analyses 27m clicks on Wanadoo websites each day
60 Babel MediaGames services provider Brighton 2003 79.59% 3,635 55 Tests all the games that can be played on Vodafone mobile phones
61 Friends ReunitedContact website operator Surrey 2003 78.74% 7,604 24 Popular website put mother in touch with son not seen for 30 years
62 Oakleigh ConsultingIT consultancy Manchester 2003 77.71% 6,342 35 Advises government agencies such as Ofsted on big IT projects
63 Nonlinear DynamicsBiotech software developer Newcastle 2003 76.41% 4,195 65 Analyses proteins and genes for blue-chip pharmaceutical companies
64 AppSenseSoftware developer Warrington 2003 76.22% 3,478 31 Ensures that no rogue software is installed on Jaguar’s computers
65 APR SmartlogikInformation software provider Cambridge 2003 75.82% 3,816 63 Designs financial news software used by 40 hedge funds
66 InclarityTelecoms services provider North London 2003 75.80% 10,738 34 Claims over half of sales generated by telecoms partnership in northern Iraq
67 EdenbrookSystems integrator Central London 2003 75.37% 6,959 47 £700,000 investment from Elderstreet and business angels funded growth
68 WesticaWireless communications provider Paisley 2003 75.10% 2,068 16 Claims majority of British fire and police services use its radio products
69 PayPointPayment network operator Hertfordshire 2003 74.78% 50,312 183 Company floated on the London Stock Exchange on September 21, 2004
70 ACISTransport software developer Buckinghamshire 2003 74.58% 7,347 74 Develops bus-stop displays telling passengers when to expect next bus
71 Spiral SoftwareModelling software developer Cambridge 2003 73.93% 1,181 18 Develops oil modelling software for BP, Chevron-Texaco and Shell
72 Silver Software ConsultantsTransport software developer Wiltshire 2003 73.80% 3,116 54 Is developing safety software for the new Airbus A380 super-jumbo
73 MultimapOnline map provider Central London 2003 73.51% 3,381 40 Supplies online mapping to 700 clients, including Tesco and Ford
74 Systems AbilityIT services provider Surrey 2003 71.40% 1,438 20 Recommendation from customer helped to secure contract with Sony
75 FootFallPedestrian traffic monitor Solihull 2003 70.49% 3,342 55 Monitors number of shoppers in 500 shopping centres in 23 countries
76 LatentzeroFinancial software developer Central London 2003 68.60% *8,737 69 Develops asset-management software for the likes of Morgan Stanley
77 Quantum Research GroupTouch-button technology designer Southampton 2003 67.76% 1,431 18 Designs touch-sensitive buttons built into Sony and GE electronics
78 Environmental Business ProductsPrinter cartridge recycler NW London 2003 67.75% 20,415 141 Makes own-brand inkjet cartridges for Tesco, Dixons and WH Smith
79 InvestisWebsite technology developer Central London 2003 66.96% *3,242 44 Designs, builds and hosts websites for companies such as Prudential
80 SearchspaceFinancial software developer Central London 2003 65.95% 11,860 141 Software helps Barclays and UBS prevent fraud and money-laundering
81 Phoebus SoftwareFinancial software provider Solihull 2003 64.37% 1,016 16 Develops mortgage software that monitors arrears and handles instalments
82 Eclipse InternetInternet service provider Exeter 2003 64.21% 5,345 32 Founded with £20,000, sold company for a reported £12.5m in September 2004
83 FastNet InternationalInternet services provider Brighton 2003 64.02% 1,304 11 Has won award for Best Small Business ISP for the past two years
84 Birchfield InteractiveEducational software developer Cardiff 2003 62.78% 1,333 26 Designs educational software with the look and feel of a computer game
85 Isis TelecommunicationsTelecoms services provider West London 2003 61.88% 14,721 56 Services 400 corporate clients, including Clifford Chance and EMI
86 Tax Computer SystemsTax software developer Staines 2003 60.33% 3,437 32 Software helps the likes of British Airways and Orange calculate tax returns
87 Neural TechnologiesArtificial intelligence software developer Hampshire 2003 60.05% 3,665 40 Claims software has halved debt for Russian mobile operator VimpelCom
88 MessageLabs GroupManaged technology provider Gloucestershire 2003 59.24% 42,436 381 Looks after e-mail security for the US Federal Reserve Bank
89 eBECSBusiness software developer Chesterfield 2003 58.78% 1,813 22 Software helps Dyson integrate manufacturing and distribution systems
90 Mobile StreamsMultimedia content provider Newbury 2003 58.01% *1,257 10 Supplies mobile-phone ringtones, games and screen backgrounds online
91 The Search WorksSearch engine advertiser Central London 2003 57.42% 1,340 16 Helps Lastminute.com boost its ranking in keyword searches on the internet
92 SynetrixNetwork technology provider Staffordshire 2003 57.34% 19,313 34 Video-conferencing services allow surgeons to broadcast operations live
93 dnsIT security consultancy Edinburgh 2003 56.08% 2,569 33 Stopped hackers attacking the website of a Premiership football club
94 AudioSoftRecording system developer Cirencester 2003 54.55% *2,792 25 Claims software is used by the Cabinet Office to record meetings
95 Inweb NetworksTelecoms services provider Surrey 2003 54.08% 3,200 10 Provides premium rate and 0800 number services for businesses
96 Momondo GroupTravel search Central London 2003 53.80% 2,785 25 Draws travel information from 900 companies to show best online deals
97 ActixTelecoms software developer West London 2003 53.21% 12,178 105 Software helps prevent loss of signal to mobile phones
98 intYInternet services developer Bristol 2003 53.16% 2,986 36 Manages internet security for businesses such as the Iron Bed Company
99 PrometheanEducational technology developer Blackburn 2003 53.03% *38,559 203 Developed interactive whiteboard now used by schools in 38 countries
100 Consilium TechnologiesApplication services provider Northern Ireland 2003 52.30% 6,371 75 Provides IT services and infrastructure to more than 90 local councils

* supplied by company   annualised figure