Top 100 Application Modernization Companies in London
The Best of March 2026Looking 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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91$25,000+50 - 249 employeesLondon, EnglandDevtech Group is a custom software development company. The Novi Sad, Serbia-based agency specializes in Custom Software Development and Enterprise App Modernization.Read More
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92$10,000+10 - 49 employeesRuislip, EnglandPi9 is an Enterprise App Modernization company located in Ruislip, England and Bartlett, Illinois. They provide Enterprise App Modernization and BI & big data consulting & SI and were founded in 2013.Read More
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93$25,000+50 - 249 employeesBracknell, EnglandDeployflow is a midsize Bracknell, England-based DevOps Managed Services company. Launched in 2018, the team provides DevOps Managed Services, AI Agents, cloud consulting & SI, Generative AI, and more.Read More
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Zilch Hall Hunter Partnership Strike/Purplebricks PI ConceptIndustries
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94$10,000+10 - 49 employeesLondon, EnglandHeadquartered in Prague, Czech Republic and London, England, DX Heroes is a software development firm. The team provides Custom Software Development and IT strategy consulting.Read More
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95$10,000+50 - 249 employeesLondon, EnglandPlexteq, a custom software development company, was established in 2014. Headquartered in Vinnytsia, Ukraine; Tallinn, Estonia and London, England, their midsize team provides Custom Software Development, Enterprise App Modernization, DevOps Managed Services, BI & big data consulting & SI, and more.Read More
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96Undisclosed50 - 249 employeesLondon, EnglandCybersecurity company ONEiO is based in Helsinki, Finland and London, England. They specialize in Cybersecurity and IT managed services.Read More
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97Undisclosed50 - 249 employeesLondon, EnglandBP3 Global Inc. Is an UX design agency. The company is based in Austin, Texas and London, England. Their team focuses on UX/UI Design and Enterprise App Modernization.Read More
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98Undisclosed50 - 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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99$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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100$5,000+2 - 9 employeesLondon, EnglandWeb design agency RiseForge is headquartered in Tiranë, Albania and London, England. The team provides Web Design and UX/UI Design.Read More
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101$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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102$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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103$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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104Undisclosed2 - 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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105$1,000+10 - 49 employeesWindsor, EnglandRead 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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106$10,000+50 - 249 employeesMaidenhead, EnglandNeosAlpha Technologies is an IT strategy consulting company. In Maidenhead, England and Jaipur, India, their team offers IT strategy consulting and Enterprise App Modernization.Read More
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107$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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108$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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109Undisclosed50 - 249 employeesBerkshire , EnglandECM consulting and SI company Proventeq was founded in 2007. They are in Berkshire , England; Pune, India and دبي, United Arab Emirates and have a midsize team. Their services include ECM consulting and SI, AI Agents, AI Consulting, cloud consulting & SI, and more.Read More
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110$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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111Undisclosed50 - 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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112Undisclosed10 - 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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113$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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114$250,000+10,000+ employeesCaldecotte, EnglandCloud 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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115$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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116$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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117$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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118Undisclosed250 - 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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119$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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120$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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