Top 100 Application Modernization Companies in London
The Best of December 2025Looking for a top legacy modernization service in London?
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 London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Enterprise Application Modernization Services
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91Undisclosed50 - 249 employeesLondon, EnglandEstablished in 2019, Ingentive, a midsize Cybersecurity company, is headquartered in London, England. Their team specializes in Cybersecurity and IT managed services.Read More
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92$5,000+Freelancer employeesLondon, EnglandKensio Software is a custom software development company. They provide Custom Software Development and Web Development and were founded in 2021.Read More
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93$10,000+10 - 49 employeesHarpenden, EnglandSoftware development firm This Is Software was founded in 2023. The small Harpenden, England-based team offers Custom Software Development, Web Development, Artificial Intelligence, and Enterprise App Modernization.Read More
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94$25,000+50 - 249 employeesBerkhamsted, EnglandApplication Management & Support company Propel Tech Ltd was launched in 2007. The agency offers Application Management & Support and Custom Software Development.Read More
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Quickline Communications Limited J.C.B - J.C. Bamford Excavators Limited Allsop Property Auction Mi Hub LTDIndustries
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95$25,000+50 - 249 employeesStevenage, EnglandRead More
LAYOUTindex is a small e-commerce development company. They offer e-commerce development, mobile app development, web development, custom software development, and more and were founded in 2009. The agency is in Madison, Alabama; Paris, France and Colombo, Sri Lanka.
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96Undisclosed2 - 9 employeesLondon, EnglandBlockchain company OAAM Consulting Ltd was founded in 2013. The small team focuses on Blockchain and Blockchain Marketing.Read More
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97$1,000+10 - 49 employeesKolkata, IndiaRead More
Located in Mississauga, Canada and Kolkata, India, Primary Infotech Private Limited is an app development firm. The small company was founded in 2019. Their services include mobile app development, web design, and e-commerce development.
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98$10,000+50 - 249 employeesMaidenhead, EnglandNeosAlpha is a Maidenhead, England-based IT strategy consulting company. They specialize in IT strategy consulting and Enterprise App Modernization and were established in 2020.Read More
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99$5,000+250 - 999 employeesSlough, EnglandSoftoo is an IT staff augmentation company. The Slough, England-based agency specializes in IT staff augmentation and Custom Software Development.Read More
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ConfigureIndustries
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100$5,000+10 - 49 employeesBracknell, EnglandAncoris is a cloud consulting & SI company. Their team is headquartered in Bracknell, England and offers cloud consulting & SI and Application Management & Support.Read More
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101$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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102Undisclosed50 - 249 employeesThird Avenue Marlow, EnglandDeveloping World Systems Ltd, an Application Testing company, was founded in 1998. They specializes in Application Testing and Enterprise App Modernization.Read More
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103Undisclosed10 - 49 employeesHigh Wycombe, EnglandCirronex is a small High Wycombe, England-based Application Testing company. Their services include Application Testing and Application Management & Support.Read More
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104$10,000+2 - 9 employeesGuilden Morden, EnglandRead More
Crowers Limited, a custom software development company, is based in Guilden Morden, United Kingdom. The company specializes in custom software development, mobile app development, web development, web design, and more and has a small team.The company was founded in 2017.
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XylemIndustries
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105$250,000+10,000+ employeesBengaluru, IndiaCloud consulting & SI company ITC Infotech focuses on cloud consulting & SI and ERP consulting and SI. They were launched in 2000.Read More
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106$50,000+10 - 49 employeesEarley, EnglandLaunched in 2019, VA Software Solutions ltd is a custom software development company. Based in Earley, England and Sofia, Bulgaria, the team focuses on Custom Software Development and Web Development.Read More
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107$25,000+2 - 9 employeesReading, EnglandAgentify is a custom software development firm. They are in Reading, United Kingdom and have a small team. Their services include custom software development, Artificial Intelligence, application management & support, enterprise app modernization, and more.Read More
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108$25,000+2 - 9 employeesBordon, EnglandPivale is a Business Consulting company. The Bordon, England-based agency was founded in 2008. Their team specializes in Business Consulting and Web Design.Read More
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109Undisclosed250 - 999 employeesBrighton and Hove, EnglandUX design agency Catalyst IT was launched in 1997. The company provides UX/UI Design and Custom Software Development.Read More
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110$5,000+10 - 49 employeesBedford, EnglandLaunched in 2008, Anterec Ltd is a software development firm. The firm specializes in Custom Software Development and Web Development, and is small.Read More
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111$25,000+2 - 9 employeesMilton Keynes, EnglandNugon is a small software development company. They focus on Custom Software Development and Enterprise App Modernization and were launched in 2020.Read More
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112$25,000+2 - 9 employeesCambridge, EnglandOrthogonality is a Cambridge, England-based software development firm. They offer Custom Software Development and Web Development.Read More
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113Undisclosed250 - 999 employeesLondon, EnglandWestbrook International is a CRM consulting and SI company founded in 1992. The midsize team provides CRM consulting and SI and Enterprise App Modernization.Read More
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114Undisclosed250 - 999 employeesBrentford, EnglandBusiness Pro Designs is an app development firm. Founded in 2007, the company is based in Brentford, England. Their team focuses on Mobile App Development and Web Design.Read More
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115Undisclosed50 - 249 employeesZürich, SwitzerlandSquirro is a midsize Generative AI company. Founded in 2012, the team offers Generative AI and BI & big data consulting & SI.Read More
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Bank of England OCBC Bank Standard Chartered CandriamIndustries
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116Undisclosed50 - 249 employeesLondon, EnglandSiliconMint is a San Francisco, California-based software development firm. Launched in 2012, the team focuses on Custom Software Development and Web Development.Read More
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117Undisclosed10 - 49 employeesLondon, EnglandCan Factory is a software development firm. In London, England, their team provides Custom Software Development and Mobile App Development.Read More
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118Undisclosed10 - 49 employeesLondon, EnglandBrand42, a web design agency, offer Web Design and Web Development. They were founded in 2004.Read More
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119$5,000+10 - 49 employeesAldermaston, EnglandIn Aldermaston, England, Voyager Networks is an IT managed services company. Their services include IT managed services and Enterprise App Modernization.Read More
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