Top 100 Application Modernization Companies in California

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Top 100 Application Modernization Companies in California

The Best of December 2025

Looking for a top legacy modernization service in California?

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. 

List of the Best California Enterprise Application Modernization Services

  • 31

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    Walnut Creek, CA
    MEV, a software development company, is in Walnut Creek, California. The team offers Custom Software Development and Mobile App Development.
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  • 32

    (58 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    Santa Clara, CA
    Vardot is a website development firm. They provide Web Development, Web Design, UX/UI Design, and Enterprise App Modernization and were launched in 2011. Their midsize team is Santa Clara, California-based.
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    Clients

    UNICEF UNHCR, the UN Refugee Agency Boston Consulting Group (BCG) Informa

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  • 33

    (15 Reviews) 4.7

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.7

    Would Recommend

    4.7
    $5,000+
    10 - 49 employees
    Sacramento, CA
    Website development company Rocket Systems was founded in 2018. The firm provides Web Development, Mobile App Development, E-Commerce Development, Custom Software Development, and more and has a small team. The firm is located in Sacramento, California and Yerevan, Armenia.
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  • 34

    (34 Reviews) 4.8

    Timeliness

    4.5

    Service Excellence

    4.8

    Value

    4.3

    Would Recommend

    4.9
    $25,000+
    250 - 999 employees
    Pleasanton, CA
    Altoros is a midsize Blockchain company. Founded in 2001, the firm is based in Pleasanton, California; Buenos Aires, Argentina; Oslo, Norway and Helsinki, Finland. Their team offers Blockchain, Custom Software Development, Web Development, Enterprise App Modernization, and more.
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    Clients

    Allstate

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  • 35

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    San Francisco, CA
    Founded in 2015, Bytex Technologies is a website development firm. Their services include Web Development and Enterprise App Modernization.
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  • 36

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    10 - 49 employees
    Fremont, CA
    Team247 Inc. Is a software development company. Launched in 2016, the company is located in Fremont, California. Their team specializes in Custom Software Development and Enterprise App Modernization.
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  • 37

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Irvine, CA
    Launched in 2018, ThinkAiCorp, a midsize big data analytics company, is in Irvine, California. Their team specializes in BI & big data consulting & SI and Mobile App Development.
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  • 38

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    Covina, CA
    Savvy Stack, Inc. Is a website development company. They provide Web Development and Custom Software Development and are based in Covina, California.
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  • 39

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    2 - 9 employees
    San Juan Capistrano, CA
    BinaryFuel, LLC is a custom software development firm. They were launched in 2015, and their services include Custom Software Development and Enterprise App Modernization.
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  • 40

    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.5

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    San Diego, CA
    Blink UX is a midsize Digital Strategy company launched in 2000. Their team focuses on Digital Strategy, Product Design, Market Research, Enterprise App Modernization, and more. The agency is based in Seattle, Washington; Cambridge, Massachusetts; San Diego, California and San Francisco, California.
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    Clients

    Amazon

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  • 41

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Irvine, CA
    AritaWeb Inc. Is a midsize AI development company based in Irvine, California. The team specializes in Artificial Intelligence and Enterprise App Modernization.
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  • 42

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    2 - 9 employees
    Emeryville, CA
    Mobile application development company AppMozart was established in 2019. The company focuses on Mobile App Development and Web Development.
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  • 43

    (0 Reviews)

    Not yet reviewed.

    $100,000+
    250 - 999 employees
    Irvine, CA
    IT strategy consulting company Prophecy Technologies focuses on IT strategy consulting and Cybersecurity. They are located in Irvine, California.
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  • 44

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    10 - 49 employees
    Los Angeles, CA
    Founded in 2018, Cadenza is an Enterprise App Modernization company. Their team specializes in Enterprise App Modernization and Mobile App Development.
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  • 45

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    2 - 9 employees
    San Francisco, CA
    BKJ Digital is a website development company. Founded in 2016, the agency is headquartered in San Francisco, California. Their services include Web Development and Custom Software Development.
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  • 46

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    Sacramento, CA
    UX design agency blueriver was launched in 2010. The team focuses on UX/UI Design and Custom Software Development.
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  • 47

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    2 - 9 employees
    San Francisco, CA
    Small software development company UI Flow, is located in San Francisco, California. The team provides Custom Software Development and Enterprise App Modernization.
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  • 48

    (5 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    2 - 9 employees
    Oakland, CA
    Aclarify is a small custom software development company. The Boston, Massachusetts-based firm was founded in 2022. Their team provides Custom Software Development, Web Development, Mobile App Development, Blockchain, and more.
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  • 49

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    50 - 249 employees
    Irvine, CA
    Founded in 2007, Codazen is a software development company. Their services include Custom Software Development and Enterprise App Modernization.
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  • 50

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    10 - 49 employees
    Carlsbad, CA
    Launched in 2000, RemedyOne, a small custom software development company, is in Carlsbad, California. Their services include Custom Software Development and Web Development.
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  • 51

    (14 Reviews) 4.9

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    Atlanta, GA

    Software development company Bellwood was established in 2019. Their small team is headquartered in Atlanta, Georgia; Farmington, New York; Gold River, California and Orlando, Florida. Their services include Custom Software Development, Web Development, Mobile App Development, E-Commerce Development, and more.

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    Clients

    WarnerMedia

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  • 52

    (0 Reviews)

    Not yet reviewed.

    $50,000+
    10 - 49 employees
    Vista, CA
    Web design agency Awsm LLC is located in Vista, California. They focus on Web Design and UX/UI Design.
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  • 53

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    250 - 999 employees
    Irvine, CA
    PreludeSys is an Enterprise App Modernization company. The team is in Irvine, California and Chennai, India, and their services include Enterprise App Modernization and Artificial Intelligence.
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  • 54

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    San Jose, CA
    Founded in 2010, Thinking Hut IT Solutions Pvt. Ltd. Is a small custom software development firm. Their services include Custom Software Development and Enterprise App Modernization.
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  • 55

    (0 Reviews)

    Not yet reviewed.

    $250,000+
    250 - 999 employees
    Los Angeles, CA
    AAXIS Digital is an e-commerce development company. Headquartered in Los Angeles, California, the firm was founded in 2001. Their services include E-Commerce Development and DevOps Managed Services.
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  • 56

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    Torrance, CA
    Bayen Group LLC is an Enterprise App Modernization company founded in 2016. The firm provides Enterprise App Modernization, and is small.
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  • 57

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    10 - 49 employees
    San Francisco, CA
    Tacpoint is a custom software development company. The team offers Custom Software Development and UX/UI Design and is headquartered in San Francisco, California.
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    Clients

    Visa

    Industries

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  • 58

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    Los Angeles, CA
    Xano, Inc. Is a Los Angeles, California-based website development firm. Their services include Web Development and Custom Software Development.
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  • 59

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    50 - 249 employees
    San Francisco, CA
    Founded in 2012, nClouds Inc. Is a midsize Microservices Architecture Services company. Their team offers Microservices Architecture Services and BI & big data consulting & SI.
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  • 60

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    2 - 9 employees
    Alameda, CA
    Entexture is a custom software development company. The Alameda, California-based company was launched in 2017. Their team provides Custom Software Development and IoT development.
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    Industries

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