Top 100 Application Modernization Companies in the United Kingdom
The Best of December 2025Looking for a top legacy modernization service in the United Kingdom?
Application modernization companies can help create new business value from existing applications. Finding the right company to partner with, however, can be an overwhelming process.
To assist you in your search for a partner, we’ve compiled this list of the top application modernization services in United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom Enterprise Application Modernization Services
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1$100,000+1,000 - 9,999 employeesLisboa, PortugalRead More
CI&T (formerly CINQ Technologies) is software development company based in Curitiba, Brazil with additional offices in Brazil and Miami. Founded in 1992, the team of 271 specializes in custom software development, IT staff augmentation, and UX/UI design. They work primarily with enterprise clients in the transportation and financial services industries.
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SITAIndustries
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2$10,000+250 - 999 employeesLondon, EnglandRead More
Founded in 2015, Transparity is a cloud consulting & SI company. The midsize London, England-based team offers cloud consulting & SI, IT managed services, Custom Software Development, Artificial Intelligence, and more.
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Apex NSPCC NHS LushIndustries
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3$50,000+50 - 249 employeesBelfast, Northern IrelandRead More
Instil Software is a software engineering firm based in Belfast, Northern Ireland. Founded in 2005, Instil has about 30 employees that work across a variety of industries. They offer custom software development, mobile app development, cloud consulting and software integration, IoT, and web development.
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4$10,000+250 - 999 employeesLondon, EnglandRead More
Launched in 2000, *instinctools is a software development company. The midsize team specializes in Custom Software Development, Web Development, IT strategy consulting, Mobile App Development, and more. The firm is in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware.
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Daimler Fujitsu Nostrum SpexAIIndustries
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5$25,000+250 - 999 employeesLondon, EnglandAltkom Software is a Warszawa, Poland-based custom software development firm. They specialize in Custom Software Development, Mobile App Development, Enterprise App Modernization, and cloud consulting & SI and were launched in 2000.Read More
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BNP ParibasIndustries
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6$10,000+50 - 249 employeesPraha, Czech RepublicValor Software is a Lakewood, Colorado-based web design company. The midsize company was established in 2013. Their services include Web Design, UX/UI Design, IT strategy consulting, IT staff augmentation, and more.Read More
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BreetheIndustries
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7$5,000+1,000 - 9,999 employeesSt Albans, EnglandFCamara is an user experience agency. Their large team is in São Paulo, Brazil; Leiria, Portugal; St Albans, England and Dubai, United Arab Emirates. Their services include UX/UI Design, IT strategy consulting, cloud consulting & SI, IT staff augmentation, and more. The firm was founded in 2006.Read More
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Farfetch IPSOS Elfa Group BTG PactualIndustries
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8$10,000+50 - 249 employeesLondon, EnglandRead More
Haefele Software is a midsize Cape Town, South Africa-based software development company. They focus on Custom Software Development, Enterprise App Modernization, Web Development, API Development, and more and were founded in 2006.
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Tesco Burger King AS Watson Group PikmykidIndustries
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9$25,000+250 - 999 employeesLondon, EnglandHelpware Tech is a midsize San Francisco, California-based IT strategy consulting company. They provide IT strategy consulting, IT staff augmentation, Custom Software Development, Web Development, and more and were founded in 2015.Read More
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Google Microsoft PWC CompIQIndustries
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10$25,000+50 - 249 employeesLondon, EnglandInnovify is an artificial intelligence development company. Founded in 2011, the midsize agency is located in London, England; San Francisco, California; Austin, California and New York, New York. Their services include Artificial Intelligence, AI Consulting, Custom Software Development, IT strategy consulting, and more.Read More
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ARM INCIndustries
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11$10,000+2 - 9 employeesBath, EnglandRead More
Skyward Digital is a Bath, United Kingdom-based user experience design agency and website development company. They offer ux/ui design and web development and were founded in 2021.
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12$100,000+1,000 - 9,999 employeesBelfast, Northern IrelandSoftware development company unosquare, LLC is headquartered in Portland, Oregon; Guadalajara, Mexico and Belfast, Northern Ireland. The large team provides Custom Software Development, IT staff augmentation, Digital Engineering, UX/UI Design, and more. The agency was established in 2009.Read More
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Axos Financial, Green Dot Bank, GTreasury, G2 Risk Solutions and Blue Owl Private Equity Stitch Fix and IDX Harvard and McGraw Hill Athena Health and Foundation MedicineIndustries
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13$50,000+250 - 999 employeesLondon, EnglandRead More
Parkside Interactive is a software company founded in 2007 with more than 50 members. They provide custom software development, enterprise app modernization, and UX/UI design services from their office in Graz, Austria. They work primarily with small businesses.
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LinkedInIndustries
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14$10,000+2 - 9 employeesFarnham, EnglandFull Clarity is a Farnham, England-based UX design company. The small team provides UX/UI Design, Advertising, Custom Software Development, Web Development, and more. The company was founded in 2018.Read More
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ITVIndustries
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15$25,000+50 - 249 employeesCardiff, WalesRead More
Box UK is an enterprise software development company based in Cardiff, UK, with an office in London. The company, founded in 1998, has more than 50 employees who provide, among others, custom software development, web development, and enterprise app modernization services to various businesses.
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OKdo.comIndustries
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16$50,000+50 - 249 employeesLondon, EnglandIntellectsoft is a software development company founded in 2007. The agency provides Custom Software Development, Mobile App Development, IT staff augmentation, Web Development, and more and has a midsize team. The agency is based in Miami, Florida; London, England; Oslo, Norway and Kyiv, Ukraine.Read More
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MitsubishiIndustries
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17Undisclosed1,000 - 9,999 employeesWrocław, PolandIntive is a large Enterprise App Modernization company. The Wrocław, Poland-based company was founded in 1999. Their team provides Enterprise App Modernization, UX/UI Design, Mobile App Development, Application Testing, and more.Read More
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Audi BMW Pockit TandemIndustries
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18$25,000+10 - 49 employeesLondon, EnglandJourni, a website development company, is in London, England. Launched in 2022, the small team provides Web Development, IT staff augmentation, Custom Software Development, Artificial Intelligence, and more.Read More
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19$50,000+50 - 249 employeesLondon, EnglandMetasite is a midsize software development firm established in 1997. Their services include Custom Software Development, Enterprise App Modernization, Generative AI, AI Agents, and more. The firm is based in Vilnius, Lithuania and London, England.Read More
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Man Group WTW BLME British LandIndustries
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20$25,000+10 - 49 employeesManchester, EnglandRead More
VTS Software is software development company located in Manchester, U.K. Since 2007, their small team of around 5 has been specializing in custom software, web, and mobile app development for small and mid-sized businesses alike. They have experience in a variety of industries such as advertising, healthcare, manufacturing, and business services.
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Whispering SmithIndustries
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21$10,000+250 - 999 employeesHarrow, EnglandRishabh Software is a software development company. They are located in Vadodara, India; Harrow, England; San Jose, California and Bengaluru, India and have a midsize team. Their services include Custom Software Development, Digital Engineering, BI & big data consulting & SI, cloud consulting & SI, and more. The firm was established in 1999.Read More
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LindeIndustries
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22$5,000+250 - 999 employeesLondon, EnglandRead More
A Salesforce Partner Innovation Award winner 2020. A full-service Salesforce Platinum consulting, development & outsourcing partner delivering across the entire Salesforce platform. 500+ people, 16 offices in 12 countries, we think globally and delivery locally.
We have been 100% focused on helping transform businesses within the Salesforce ecosystem over the last 10 years. Clients love our flexible, nimble, and cost-effective approach. It's why we receive an average customer satisfaction rating of 4.8 out of 5.
As PDO Experts, Salesforce.org Impact Partners, and Tableau Partners, we are one of a few Salesforce partners to have the technical scale, expertise, and experience to design & deliver core Salesforce implementations & AppExchange apps.
You benefit from our industry knowledge and experience by implementing a best practice solution within your business. Quickly & efficiently. Our specialist certified consultants & developers have delivered over 1000 projects to more than 350 clients.
We work hand-in-hand with stakeholders to create achievable roadmaps, deliver benefits quickly & maximize Salesforce investments. We have the technical expertise & experience to deliver solutions across all Salesforce clouds, for all sizes of companies, in many industries.
With 500+ Salesforce professionals located in our regional offices and central delivery hubs, we utilize best practice Salesforce technology and dev ops, enabling our customers to realize the benefits quickly.
We have the scale to provide dedicated teams of developers and consultants to our GSI and ISV partners. Since 2013, Salesforce Services has used VRP’s development expertise on over 20 of their most strategic, enterprise accounts. As one of the few PDO experts, we have helped ISVs with ideation, design, development, and support with AppExchange apps.
Our dedicated Managed Service team provides support, admin & small enhancements to clients via flexible, responsive & cost-effective monthly packages of hours.
Key clients: Rolls Royce, Welk Resorts, BVT Sweden, Felm, Beyond Better Foods, Digital Genius
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Rolls RoyceIndustries
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23$10,000+10 - 49 employeesChobham, EnglandRead More
Custom software development company Blue Tea Software - London is located in Chobham, United Kingdom. The small team provides custom software development, web development, mobile app development, and enterprise app modernization. The firm was founded in 2014.
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R;pple Suicide PreventionIndustries
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24Undisclosed1,000 - 9,999 employeesHelsinki, FinlandNordcloud is a cloud consulting & SI company launched in 2006. Their services include cloud consulting & SI and IT managed services.Read More
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FinnairIndustries
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25$25,000+50 - 249 employeesBracknell, EnglandDeployflow is a midsize DevOps Managed Services company launched in 2018. Their team focuses on DevOps Managed Services, IT managed services, cloud consulting & SI, and Enterprise App Modernization. The company is located in Bracknell, England and Warszawa, Poland.Read More
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Zilch Hall Hunter Partnership Strike/Purplebricks PI ConceptIndustries
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26$5,000+2 - 9 employeesShrewsbury, EnglandWolf Logic Ltd. Is a software development firm based in Shrewsbury, England; Birmingham, England and London, England. The small team offers Custom Software Development, Enterprise App Modernization, Artificial Intelligence, AI Consulting, and more. The company was launched in 2018.Read More
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Nidec Corporation CareDocs Sheppee International LtdIndustries
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27$25,000+50 - 249 employeesLondon, EnglandRead More
Esynergy is a big data analytics company. They are headquartered in London, United Kingdom and have a midsize team. Their services include BI & big data consulting & SI, cloud consulting & SI, custom software development, mobile app development, and more.
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28$25,000+50 - 249 employeesLondon, EnglandHeadquartered in London, England and Prague, Czech Republic, Applifting is a custom software development firm. Founded in 2014, the midsize team offers Custom Software Development, Mobile App Development, Artificial Intelligence, Generative AI, and more.Read More
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AdidasIndustries
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29$25,000+10 - 49 employeesNewquay, EnglandRead More
Big data analytics company flowmoco is based in Newquay, United Kingdom. The small team focuses on BI & big data consulting & SI, cloud consulting & SI, custom software development, mobile app development, and more and was launched in 2012.
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SkyIndustries
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30$10,000+250 - 999 employeesLondon, EnglandRead More
Softwire is a digital design, engineering and support agency, with offices in London, Cambridge and Manchester. Employing over 200 engineers we create bespoke digital software, mobile apps, and offer strategic IT consulting for some of the UK’s leading brands including the BBC, David Lloyd Clubs, Channel 5 and many large Government Departments.
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The BBCIndustries
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