Rank Company Location Year end Annual sales rise over 3 years Latest sales £000s Staff Comment
1 Ve InteractiveEcommerce technology developer Central London Dec 2014 305.55% *20,891 840 Its latest fundraising of £51m valued the company at £1.2bn
2 NeuvenStaff administration software Manchester Jul 2014 270.98% 36,870 37 Its software is used by supermarkets and Allied Bakeries
3 FanDuelFantasy sports game developer Edinburgh Dec 2014 261.71% *34,399 400 Has more than 1m active paid users in North America
4 Funding CirclePeer-to-peer lending Central London Dec 2014 195.93% 13,102 182 Says more than $1bn has been lent through the website to 10,000 businesses
5 RateSetterPeer-to-peer lending Central London Mar 2015 184.36% *12,481 77 Says it was the first P2P lending platform to introduce a provision fund to protect investors
6 LMAX Exchangee-FX trading technology West London Dec 2014 181.30% 26,155 120 Half of its 120 employees are developers
7 PalringoMessaging and gaming platform Central London Aug 2014 172.80% 8,398 34 Has 35m registered users and is growing through acquisition
8 The Media ImageDigital marketing agency West London Feb 2015 171.10% *8,090 17 Its founder was Google UK's fifth employee
9 ImmunocoreBio-technology developer Abingdon Sep 2014 168.25% 6,381 94 Completed the largest financing — £205m — for a private European life sciences company
10 ImpulsepayMobile payment technology Central London Dec 2014 168.23% ‡11,599 10 Enables payment for goods and services through mobile phone bills
11 AffectvAdvertising technology developer Central London Dec 2014 168.09% 5,146 66 Its targeted advertising technology tracks 85% of people online in the UK
12 Bullitt GroupMobile phone designer Reading Dec 2014 164.85% 60,924 72 Recently launched the Kodak IM5 smartphone
13 Epos NowPayment systems developer Norwich May 2015 156.07% 5,199 95 Its point-of-sale systems were used in pop-up shops that promoted the Jurassic World film
14 Tantalum CorporationVehicle tracking software developer Uxbridge Dec 2014 152.68% *‡12,239 150 More than 1m vehicles have been fitted with its software and tracking devices
15 VictorOnline private jet hire Central London Dec 2014 142.93% *7,861 31 75% of the company's major shareholders are frequent flyers, including Sir Elton John
16 Chelsea Apps FactoryApp developer Central London Nov 2014 138.75% 5,339 60 Helps blue-chip clients make better use of apps to cut costs and become more efficient
17 Farfetch.ComOnline portal for fashion boutiques Central London Dec 2014 129.50% * 199,237 447 Allows shoppers to browse more than 300 international fashion boutiques online
18 RTX Routetrader ExchangeTelecoms trading platform Central London Mar 2014 127.36% 55,024 35 Its software is used by telecoms operators worldwide to buy and sell services
19 Redtail TelematicsGPS tracking technology developer Cambridge Mar 2015 116.03% *5,177 12 Makes systems for insurance companies that track location, speed and direction of cars
20 CloudreachCloud services enabler Central London Jul 2015 115.28% *26,655 148 Has helped River Island and BP embrace cloud technology
21 OntracIT consultancy Gateshead Jan 2015 114.90% 7,119 28 Is launching a platform that lets non-programmers create their own business apps
22 Prepaid Financial ServicesPayment services provider Central London Dec 2014 110.41% 18,466 34 Its prepaid cards are used by health services, local governments and multinational companies
23 Green Man GamingOnline games retailer Central London Dec 2014 105.76% 16,305 59 More than 90% of its sales are to overseas markets
24 The App BusinessMobile app developer Central London Apr 2015 103.40% *11,524 105 Its founders helped to launch Apple’s App Store in Europe
25 CaptifyDigital marketing agency Central London Mar 2015 100.80% *6,306 54 After raising £8m from investors in June it plans to expand its European business
26 Tech21Device impact protection maker Southwest London May 2015 97.45% *67,100 70 Its impact protection smartphone cases and screen films are sold in Apple stores globally
27 BCSGIT consultancy Central London Jul 2014 93.70% 15,896 88 Recently built software for Sage’s SME client base
28 ZutoCar finance specialist Cheshire Feb 2015 92.86% *20,588 296 Says its technology facilitates more than £22m of loans each month
29 TORIIT services provider Central London Mar 2015 90.02% *25,082 33 Helps financial institutions manage compliance and organisational change
30 Infinity SDCDatacentre services provider Central London Mar 2015 85.71% *23,180 69 Its new data centre, part of the redeveloped Olympic media centre, will open in 2016
31 GBM DigitalIT consultancy Manchester Dec 2014 84.51% *23,166 38 Runs training courses for app developers and graphic designers
32 ESP GroupMass transit smartcards Hull Jul 2014 83.78% 53,393 199 Issues Oyster cards for London Underground as well as rail cards used nationally
33 HuddleOnline workspace provider Central London Dec 2014 83.25% 9,653 135 Has raised more than £50m in four rounds of funding since 2007
34 Fonix MobileMobile software developer Central London Jun 2015 80.02% *28,105 20 Its software platform helped this year’s Comic Relief raise £8m through text donations
35 BrandwatchSocial media monitoring technology Brighton Dec 2014 79.64% *15,246 360 Collects 200m pieces of online data every day
36 IDscanIdentity document authentication East London Jul 2015 77.80% *8,287 74 Processes more than 5m documents a day in the UK
37 InfoMediaMobile payment provider Northampton Oct 2014 75.91% 12,846 38 Microsoft is embedding this company's iView software in Nokia Lumia phones in the US
38 AnalogFolkDigital marketing agency Central London Dec 2014 75.57% 11,363 95 In June it opened a sister office in Hong Kong
39 Agenor TechnologyIT services provider Edinburgh Dec 2014 74.55% *9,416 25 Is working with NHS Scotland on data management projects
40 IP SolutionsCloud communications technology Central London Nov 2014 73.70% *6,352 27 Secured £5.7m from private equity firm Living Bridge, which took a 30% stake in December
41 ZopaPeer-to-peer lending Central London Dec 2014 72.88% *11,476 62 Has a partnership with Uber to help its drivers access credit to purchase cars
42 LoveLiveVideo agency for music Central London Dec 2014 72.65% *5,734 39 Founding partners Tim Dellow and Toby Langley own record label Transgressive
43 EDM GroupInformation management services Central London Mar 2015 69.59% *69,731 1324 Is helping HMRC digitise and manage the 20m pieces of inbound mail it receives every year
44 MaindecIT services provider Buckinghamshire Mar 2015 66.75% 61,020 136 Acquired IT services provider CSA Waverley, a former Tech Track 100 company, in 2013
45 Reflex GamingGaming machines manufacturer Newark Dec 2014 66.50% 14,233 40 Sold 4,000 fruit machines to pubs last year
46 Timeline TVBroadcast technology provider West London Dec 2014 65.99% *18,161 82 Designed, built and manages BT Sports’ production facilities
47 MobileWebAdzMobile advertising provider Central London Mar 2015 65.73% *38,667 98 Over 90% of the company’s revenue is generated abroad
48 Olive Business SolutionsTelecoms services provider High Wycombe Jan 2015 65.55% *33,389 148 Has improved communication systems for 7,000 firms including Moonpig and Cath Kidston
49 ECSIT services provider Glasgow Dec 2014 64.71% *42,144 167 Has offices across the UK, South Africa and India
50 Ideal NetworksIT services provider Brighton Dec 2014 63.79% 5,498 35 Has provided telephone systems for all of Ikea’s branches in the UK
51 SkyscannerTravel search engine Edinburgh Dec 2014 62.37% 92,897 583 Established Skyscanner for Business, providing data-led tools to the travel industry
52 essensysCloud services provider Central London Jul 2014 62.33% 10,311 27 Recently opened a US office as part of plans to expand overseas
53 New Call TelecomTelecoms services provider Central London Mar 2015 62.27% *57,977 175 Made headlines when it switched its main contact centre from India to Burnley, Lancashire
54 BlisMediaAdvertising technology provider Central London Dec 2014 62.09% *8,021 48 Is planning to open an office in New York next year
55 ChargemasterElectric car charging equipment developer Luton Dec 2014 61.82% 12,800 70 Has produced 10,000 public charging points for battery-powered cars across Europe
56 TestPlantSoftware testing tools developer Central London Dec 2014 61.59% 7,403 55 Overseas sales account for 85% of total revenue
57 Simplify DigitalProduct comparison software developer West London Jan 2015 61.46% *21,860 103 In January it launched an app that helps consumers switch to cheaper energy suppliers
58 eTech SolutionsSurveying software developer Solihull Mar 2015 59.10% *7,229 125 Its mobile software is used by thousands of surveyors as well as energy companies
59 EmpoweredIT services provider Bedfordshire May 2015 59.00% *12,066 78 Growth is partially a result of the acquisition of three rival firms last year
60 Core GroupTelecoms services provider Central London Jun 2014 58.19% 33,263 165 Partners include EE, O2, Three, Network Rail and London Underground
61 SeicheMarine detection systems developer Devon May 2014 57.83% 5,581 37 Invests 20% of turnover in R&D activities
62 moneyPrice comparison website Gloucestershire Oct 2014 57.29% 23,290 38 Managing director Chris Morling taught himself to code websites in order to start the business
63 CrunchOnline accountancy firm Hove Mar 2015 56.87% *5,111 150 Is the online accountant recommended by Uber to its drivers
64 EdenhouseIT consultancy Warwickshire Mar 2015 56.16% 22,855 194 Is one of the UK’s largest independent SAP consultancies
65 Channel TelecomTelecoms service provider London Dec 2014 56.10% *5,576 19 Supplies various large banks and Gucci in the UK with telecoms technology
66 NewVoiceMediaContact centre technology developer Basingstoke Jan 2015 56.07% 14,922 222 Boosted growth by opening offices in New York, San Francisco, Sydney and Europe
67 ServiceTickMarket research technology developer Norwich Mar 2015 55.71% *5,040 69 Set up in founder Kevin Goodings’ kitchen while he ran his website design agency
68 DigitalboxAdvertising technology consultancy Bath Apr 2015 55.59% *7,186 47 Claims it delivers more than 3bn online ads a month for brands such as Ikea and British Gas
69 E-LeatherEco-friendly materials developer Peterborough Apr 2014 54.50% 12,613 113 Has perfected a tougher, lightweight version of natural leather used in airline seats
70 PaymentSensePayment processing services Central London Mar 2014 54.06% 13,247 140 40,000 small businesses in the UK use this firm’s credit card processing service
71 Mansion House ConsultingIT consultancy Central London Jan 2015 54.05% *33,310 69 Provides regulatory and IT consultancy services to international banks
72 ApicalImaging technology developer Central London Mar 2015 53.79% *16,614 64 Says its video technology powers security cameras worldwide
73 Exco InTouchMedical technology provider Nottingham Apr 2015 53.77% *9,122 90 Says it has engaged with more than 1m patients and over 26,000 hospitals and clinics
74 Fidelity GroupTelecoms services provider Oxfordshire Dec 2014 53.49% *7,180 18 Founders set up and sold two telecoms companies before starting this business
75 Nostrum GroupFinancial software developer Harrogate Dec 2014 53.24% 9,047 64 Increased headcount by 35% to 64 in 2014
76 eBECSBusiness software developer Chesterfield Mar 2014 53.21% 20,922 154 Helped Amec, Costa Coffee and Whitbread implement Microsoft enterprise software
77 AvectoIT security software developer Cheshire Jun 2015 52.63% *14,675 119 Opened an office in Frankfurt this year as it targets future growth in Central Europe
78 Virtual1Network services provider Central London Mar 2015 52.47% *12,500 50 Has an online portal which provides instant pricing options
79 OneComTelecoms services provider Hampshire Dec 2014 51.83% *60,849 270 Manages more than 200,000 mobile phone contracts
80 CalastoneFund transaction network Central London Dec 2014 51.35% *11,525 88 Says it sent its 100 millionth network message in July
81 Dovetail GamesSimulation games maker Kent Mar 2014 49.30% 6,078 63 Is looking to develop its games for virtual reality headsets
82 VisualsoftWebsite developer Stockton-on-Tees Jun 2014 48.27% 6,699 150 Has introduced “unlimited holidays” for staff so long as they meet targets and deadlines
83 EVWellbore diagnosis technology Norwich Mar 2015 47.94% *21,587 116 Its cameras can withstand temperatures of up to 175°C and operate up to 10km underground
84 Condeco SoftwareWorkplace management software Central London May 2015 47.66% *15,514 212 Has nine overseas offices, including a research and development hub in Delhi
85 Seven Technologies GroupSecurity technology developer County Antrim Sep 2014 47.03% 13,783 135 Has developed surveillance technology to help prevent poaching in Kenya’s national parks
86 POD PointElectric vehicle charging developer Central London Jun 2015 46.96% *6,482 50 In March last year it raised £1.5m in crowdfunding
87 MPB GroupPhotography equipment trading platform Brighton Mar 2015 46.89% *7,423 25 Last year its website sold a collectable camera lens for almost £100,000
88 InSkin MediaAdvertising technology provider Central London Dec 2014 46.21% 16,806 63 Its advertising technology is used on more than 600 websites
89 CommAgilityTelecoms electronics manufacturer Loughborough Sep 2014 45.85% 7,381 17 Provides the technology used for 4G phone networks and for research into 5G
90 Click TravelTravel management system developer Birmingham Mar 2015 45.54% *92,516 110 Local authorities arrange travel for their employees through its website
91 ZoneDigital marketing agency Central London Dec 2014 45.45% *15,401 167 Implements digital strategies for high-profile brands such as Nike, Tesco and Coca-Cola
92 Equal ExpertsSoftware developer Central London Mar 2015 44.29% *30,645 85 Is using private sector experience to help the government with its digital strategy
93 EFC GroupOil and gas technology developer Aberdeen Mar 2015 43.41% *34,129 157 Sells oil and gas instrumentation and drilling equipment to customers globally
94 EmoderationSocial media management agency Central London Mar 14 43.11% 8,892 360 Manages social media and online reputations for global brands such as MTV
95 Infectious MediaDigital advertising software developer Central London Apr 2015 42.69% *18,400 65 Claims its algorithms process more than 40bn ad decisions each month
96 Aspire Technology SolutionsData services provider Gateshead Feb 2015 42.40% *7,337 75 Provides specialist data and telecoms services used by the royal palaces and Sunderland FC
97 CordiumRegulatory compliance consultancy Central London Jun 2014 42.28% 18,853 180 Advises and supports over 1,500 investment firms worldwide
98 SITS GroupCloud services provider Northumberland Mar 2015 42.15% *5,104 25 Has provided IT services to the Premier League, enabling its office staff to work remotely
99 CR360Software developer Cambridge Jun 2015 41.83% *9,500 145 Helps Marks & Spencer audit its supply chain
100 EssenceDigital marketing agency Central London Mar 2014 41.78% 211,409 456 Generates more than half of its turnover in North America from clients that include Google

* supplied by company  † annualised figure