Top 100 Application Modernization Companies in the United Kingdom

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Top 100 Application Modernization Companies in the United Kingdom

The Best of February 2026

Looking 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. 

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List of the Best United Kingdom Enterprise Application Modernization Services

  • 91

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Zürich, Switzerland
    Squirro is a midsize Generative AI company. Founded in 2012, the team offers Generative AI and BI & big data consulting & SI.
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    Clients

    Bank of England OCBC Bank Standard Chartered Candriam

    Industries

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  • 92

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    2 - 9 employees
    Stockport, England
    Enterprise App Modernization company BossLabs was founded in 2020. Located in Stockport, England, the team specializes in Enterprise App Modernization and Web Development.
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  • 93

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    10 - 49 employees
    Ruislip, England
    Pi9 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.
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  • 94

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    250 - 999 employees
    London, England
    Pythian is a business intelligence company in Ottawa, Canada and San Francisco, California. They specialize in BI & big data consulting & SI and cloud consulting & SI and were launched in 1997.
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    Clients

    Fox Sports

    Industries

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  • 95

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    Maidenhead, England
    NeosAlpha Technologies is an IT strategy consulting company. In Maidenhead, England and Jaipur, India, their team offers IT strategy consulting and Enterprise App Modernization.
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  • 96

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Newcastle upon Tyne, England
    Codification is a cloud consulting & SI company. The Newcastle upon Tyne, England-based team provides cloud consulting & SI and ERP consulting and SI.
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  • 97

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    1,000 - 9,999 employees
    Harrow, England
    IT strategy consulting company Changepond Technologies Private Limited was established in 2000. The agency specializes in IT strategy consulting and IT managed services.
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  • 98

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Leeds, England
    User experience agency Burendo was launched in 2018. Based in Leeds, England, the team specializes in UX/UI Design and Product Design.
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  • 99

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    50 - 249 employees
    Liverpool, England
    Yozu is a midsize custom software development firm founded in 2013. Their team focuses on Custom Software Development and Mobile App Development.
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  • 100

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    50 - 249 employees
    London, England
    Quantum-h is a software development company launched in 2019. The firm provides Custom Software Development and Web Development.
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  • 101

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    London, England
    Digiata is a custom software development firm founded in 2001. The firm offers Custom Software Development and Enterprise App Modernization.
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    Clients

    Vitality Discovery Insurance Allan Gray Old Mutual

    Industries

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  • 102

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Brighton and Hove, England
    UX design agency Catalyst IT was launched in 1997. The company provides UX/UI Design and Custom Software Development.
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  • 103

    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $1,000+
    10 - 49 employees
    Kolkata, India

    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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  • 104

    (0 Reviews)

    Not yet reviewed.

    $75,000+
    50 - 249 employees
    Birmingham, England
    Gravity9, a midsize custom software development firm, is located in Birmingham, England and london, England. The team offers Custom Software Development and Enterprise App Modernization.
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    Industries

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  • 105

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    London, England
    SiliconMint is a San Francisco, California-based software development firm. Launched in 2012, the team focuses on Custom Software Development and Web Development.
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  • 106

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    10 - 49 employees
    London, England
    Headquartered in London, England, Lolly Co is a small Enterprise App Modernization company. The team specializes in Enterprise App Modernization and Digital Strategy.
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  • 107

    (0 Reviews)

    Not yet reviewed.

    $100,000+
    10 - 49 employees
    London, England
    Launched in 2018, Focused is a small custom software development firm based in Chicago, Illinois and Denver, Colorado. Their team offers Custom Software Development and Mobile App Development.
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    Industries

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  • 108

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    2 - 9 employees
    Leeds, England
    Software development firm DRS Software is located in Leeds, England. Their services include Custom Software Development and Enterprise App Modernization.
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    Clients

    Siemens Healthineers Harvard University IUVO Alpha Process Control
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  • 109

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    2 - 9 employees
    Leeds, England
    Moonfive is a website development firm. They are located in Leeds, England, and their services include Web Development and Enterprise App Modernization.
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  • 110

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    10 - 49 employees
    Bedford, England
    Launched in 2008, Anterec Ltd is a software development firm. The firm specializes in Custom Software Development and Web Development, and is small.
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    Industries

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  • 111

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    10 - 49 employees
    London, England
    Headquartered in Prague, Czech Republic and London, England, DX Heroes is a software development firm. The team provides Custom Software Development and IT strategy consulting.
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    Industries

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  • 112

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    London, England
    Established in 2012, LiveWyer is an IT strategy consulting company. The team offers IT strategy consulting and cloud consulting & SI.
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  • 113

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    2 - 9 employees
    London, England
    Code Development Ltd. Is a custom software development firm. The London, England-based company provides Custom Software Development and Application Testing.
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  • 114

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    50 - 249 employees
    Brentford, England
    Mobile application development company Oursky is based in Kowloon, Hong Kong and Taipei, Taiwan. Launched in 2008, the team focuses on Mobile App Development and Artificial Intelligence.
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  • 115

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    10 - 49 employees
    London, England
    Software development company Xamun was founded in 2015. The small team provides Custom Software Development and Artificial Intelligence.
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    Industries

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  • 116

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    50 - 249 employees
    Manchester, England
    Robiquity is an IT strategy consulting company. Based in Manchester, England and Toronto, Canada, the team provides IT strategy consulting and cloud consulting & SI.
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    Industries

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  • 117

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    10 - 49 employees
    London, England
    Digital Detox Ltd is a small custom software development firm founded in 2004. Their services include Custom Software Development and Web Design.
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  • 118

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    London, England
    Invenics is a software development firm launched in 2017. Located in London, England and Ernakulam, India, the team provides Custom Software Development and Web Development.
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    Industries

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  • 119

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Berkshire , England
    Proventeq, an ECM consulting and SI company, was established in 2007. Headquartered in Berkshire , England and Pune, India, the team focuses on ECM consulting and SI and AI Agents.
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    Industries

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  • 120

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    2 - 9 employees
    Milton Keynes, England
    Nugon is a small software development company. They focus on Custom Software Development and Enterprise App Modernization and were launched in 2020.
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    Industries

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