Top 100 Software Development Companies in Bellevue

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Top 100 Software Development Companies in Bellevue

The Best of July 2025
Investing in a cutting-edge software solution that’s tailored to help you improve your operations and business-related matters can positively impact your bottom line. Productivity is the key, and custom solutions cut down time, reduce repetitive tasks, and streamline processes, giving more room for business growth. 
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List of the Best Bellevue Software Developers

  • 1
    (33 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    Seattle, WA

    Founded in 2010 in Seattle, Billberry is a software development studio creating custom software, web apps, and digital products in partnership with some of the world's biggest brands. They have a veteran team of fewer than 50 strategists, designers, and developers who work in partnership with clients to help them grow, innovate, and move their businesses forward. Clients include businesses of all sizes in various industries, including business services, consumer products and services, and financial services.

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    Clients

    Days for Girls

    Industries

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  • 2
    (36 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    4.9
    $50,000+
    250 - 999 employees
    Seattle, WA
    Jelvix is a software development firm founded in 2011. The agency provides Custom Software Development, Enterprise App Modernization, Mobile App Development, and Artificial Intelligence and has a midsize team. The agency is located in Tallinn, Estonia; Kharkiv, Ukraine; Stuttgart, Germany and London, England.
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    Clients

    Tiber Capital Group

    Industries

  • 3
    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $100,000+
    250 - 999 employees
    Seattle, WA

    Founded in 2007, Theorem is a software development firm. The midsize team specializes in custom software development, ux/ui design, IoT development, IT strategy consulting, and more. The company is based in Los Angeles, California; Santa Monica, California; New York, New York and San Francisco, California.

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    Clients

    AT&T

    Industries

  • 4
    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $50,000+
    10 - 49 employees
    Seattle, WA
    ATOMICUS, a custom software development firm, was launched in 1999. They are in Seattle, Washington and Gdańsk, Poland and have a small team. Their services include custom software development.
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    Clients

    BRUKER CAMECA AMETEK Hitachi High-Tech

    Industries

  • 5
    (9 Reviews) 4.7

    Timeliness

    4.4

    Service Excellence

    4.8

    Value

    4.3

    Would Recommend

    4.7
    $10,000+
    10,000+ employees
    Bellevue, WA

    Beyondsoft Consulting is a business IT and consulting company based in Bellevue, Wash., with offices in Torrance, Calif.; Singapore; Beijing; Noida, India; and Kyiv, Ukraine. The company, founded in 1995, has more than 10,000 employees and provides BI & big data consulting & SI, cloud consulting & SI, IT strategy consulting, custom software development, and enterprise app modernization services. Beyondsoft Consulting serves enterprise and mid-market companies in various industries that include IT, automotive, and financial services.

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    Clients

    HP

    Industries

  • 6
    (9 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    2 - 9 employees
    Seattle, WA

    Lunarbyte.io is a development agency based in Seattle. Since 2019, the 3-person team has built websites, custom software, and mobile apps for predominantly small businesses.  

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    Clients

    DDM Imports

    Industries

  • 7
    (72 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $50,000+
    50 - 249 employees
    Seattle, WA

    ThirstySprout is an outsourced development company headquartered in Seattle with an additional office in San Franciso. Founded in 2017, they currently have about 18 employees. They provide IT staff augmentation as well as custom software and web development services to primarily midmarket agencies in IT, e-commerce, and business services.

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    Clients

    Rover.com

    Industries

  • 8
    (87 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    4.9
    $5,000+
    50 - 249 employees
    Seattle, WA
    UPQODE, a web design company, is in Nashville, Tennessee; New York, New York; Tampa, Florida and Seattle, Washington. The midsize firm was established in 2015. Their services include Web Design, Web Development, UX/UI Design, Custom Software Development, and more.
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    Clients

    Gracenote - Entertainment Providers

    Industries

  • 9
    (13 Reviews) 4.7

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.5

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    Bellevue, WA
    Custom software development firm Affirma Consulting was founded in 2001. They are based in Bellevue, Washington; Ahmedabad, India; Dublin, Ireland and Fayetteville, Arkansas and have a midsize team. Affirma Consulting provides Custom Software Development, AI Consulting, and Generative AI.
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    Clients

    Microsoft

    Industries

  • 10
    (27 Reviews) 4.8

    Timeliness

    4.6

    Service Excellence

    4.6

    Value

    4.3

    Would Recommend

    4.8
    $25,000+
    250 - 999 employees
    Kirkland, WA
    Pwrteams is an IT staff augmentation company. Their midsize team is based in Kraków, Poland; L'viv, Ukraine; Koerich, Luxembourg and Berlin, Germany. The company provides IT staff augmentation, Custom Software Development, Application Testing, Staffing, and more. The company was launched in 2007.
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    Clients

    SiteCore TUI News UK Dow Jones

    Industries

  • 11
    (35 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    5.0
    $5,000+
    250 - 999 employees
    Kirkland, WA
    Established in 2005, UKAD is an IT staff augmentation company. Their midsize team is located in Kirkland, Washington; Kraków, Poland; Kharkiv, Ukraine and Cesson-Sévigné, France and focuses on IT staff augmentation, E-Commerce Development, Low/No Code Development, Custom Software Development, and more.
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    Clients

    AJ Produkter Ginza TargetAid EntitledTo

    Industries

  • 12
    (28 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.7

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    Medina, WA
    Flower Press Interactive is a small user experience agency launched in 2001. Their team offers UX/UI Design, Mobile App Development, Custom Software Development, Web Development, and more. The company is located in Medina, Washington.
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    Clients

    Insurance Lounge

    Industries

  • 13
    (14 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    Seattle, WA
    Culture Foundry is a web design agency. They focus on Web Design, Web Development, Digital Strategy, Custom Software Development, and more and were established in 2010. Their small team is located in Seattle, Washington; Boulder, Colorado; Austin, Texas and Portland, Oregon.
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    Clients

    24 Hour Fitness

    Industries

  • 14
    (11 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $5,000+
    50 - 249 employees
    Seattle, WA
    Headquartered in Seattle, Washington; Yerevan, Armenia and Almaty, Kazakhstan, Innova is a big data analytics company. The midsize agency was established in 2021. Their services include BI & big data consulting & SI, cloud consulting & SI, IT managed services, Custom Software Development, and more.
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    Industries

  • 15
    (14 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.4

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    Seattle, WA
    UpTop is a small UX company. Founded in 2000, the team offers UX/UI Design, Custom Software Development, and Mobile App Development. The firm is based in Seattle, Washington.
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    Clients

    Amazon F5 SAP Concur Logitix

    Industries

  • 16
    (33 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    Seattle, WA
    Mobcoder, an IT staff augmentation company, is located in Seattle, Washington; Cobham, England; Ghaziabad, India and Burnaby, Canada. The midsize company was launched in 2014. Their services include IT staff augmentation, Artificial Intelligence, UX/UI Design, BI & big data consulting & SI, and more.
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    Clients

    General mills

    Industries

  • 17
    (21 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    5.0
    $25,000+
    2 - 9 employees
    Seattle, WA
    Black Antelope, a website development company, was established in 2009. Headquartered in Seattle, Washington, their small team focuses on Web Development, UX/UI Design, Custom Software Development, E-Commerce Development, and more.
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    Clients

    UC Berkeley (Berkeley, CA)

    Industries

  • 18
    (16 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $5,000+
    10 - 49 employees
    Seattle, WA

    Slashdev is a small software development company. The Winter Park, Florida-based company was established in 2021. Their services include custom software development, web development, mobile app development, wearable app development, and more.

    Read More

    Industries

  • 19
    (14 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    Seattle, WA
    Tecla, an IT staff augmentation company, was launched in 2013. The agency offers IT staff augmentation, Staffing, Custom Software Development, and Web Development and has a midsize team.
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    Clients

    Mercedes-Benz

    Industries

  • 20
    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    2 - 9 employees
    Seattle, WA
    Launched in 2023, Matey is a small web design agency. Their team specializes in web design, ux/ui design, product design, web development, and more. The agency is in Seattle, Washington.
    Read More

    Industries

  • 21
    (12 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    Kirkland, WA
    AccelOne is an artificial intelligence company launched in 2013. Headquartered in Kirkland, Washington; Buenos Aires, Argentina and Mission Viejo, California, their midsize team specializes in Artificial Intelligence, Generative AI, IT managed services, IT staff augmentation, and more.
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    Clients

    Xapo

    Industries

  • 22
    (1 Reviews) 5.0

    Timeliness

    4.5

    Service Excellence

    4.5

    Value

    4.0

    Would Recommend

    4.5
    Undisclosed
    50 - 249 employees
    Seattle, WA

    Smashing Ideas is a mobile app development company that offers an array of services such as UI/UX design, web design, data strategy and analytics, and quality assurance and testing. Since its founding in 1996, Smashing Ideas has grown to over 50 employees who are passionate, curious, and creative.

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    Clients

    ReachNow
  • 23
    (1 Reviews) 5.0

    Timeliness

    4.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    2 - 9 employees
    Seattle, WA

    Northwest Independent Ruby Development is a digital agency based in Seattle. Since 2011, the small team of four has specialized in providing web and custom software development. 

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    Clients

    University of Washington
  • 24
    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    4.5

    Value

    4.5

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    Bellevue, WA

    Virtuosity Consulting, a custom software development firm, was launched in 2008. They are located in Bellevue, Washington and Navi Mumbai, India and have a midsize team. Their services include custom software development, IT managed services, enterprise app modernization, web development, and more.

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    Industries

  • 25
    (4 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    4.9

    Value

    5.0

    Would Recommend

    5.0
    $50,000+
    10 - 49 employees
    Seattle, WA

    New Normal, founded in 2012, is a software services agency headquartered in Seattle. Their company consists of a team of 22 people who specialize in web development, mobile app development, and e-commerce development. While they mostly work with mid-market businesses, they also work with enterprise and small businesses. The businesses they work with are mostly in the advertising & marketing, e-commerce, and financial services industries.
     

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    Clients

    Amazon

    Industries

  • 26
    (3 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $5,000+
    10 - 49 employees
    Bellevue, WA

    Scalex Technology Solutions is a digital agency founded in Bellevue, Wash. in 2015 with fewer than 50 employees. They specialize in cloud consulting, mobile app development, and custom software development for clients in the fields of education, financial, and IT services.

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    Clients

    World Vision

    Industries

  • 27
    (3 Reviews) 4.7

    Timeliness

    4.5

    Service Excellence

    4.8

    Value

    4.2

    Would Recommend

    4.7
    $75,000+
    2 - 9 employees
    Seattle, WA

    Lab is a product development studio based in Seattle. The studio, founded in 2015, has a team of less than ten that provides UX/UI design, product design, and custom software development services to various companies in the consumer products & services, IT, and e-commerce industries.

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    Clients

    Amazon Web Services

    Industries

  • 28
    (0 Reviews)

    Not yet reviewed.

    $1,000+
    1,000 - 9,999 employees
    Bellevue, WA
    Insight Global is a large business intelligence company in Atlanta, Georgia and Birmingham, Alabama. Their services include BI & big data consulting & SI and cloud consulting & SI.
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    Industries

  • 29
    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $1,000+
    250 - 999 employees
    Bellevue, WA

    E-commerce development firm Neighborsoft.team was established in 2009. Their midsize team is headquartered in Bellevue, Washington. Neighborsoft.team provides e-commerce development, web development, custom software development, mobile app development, and more.

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    Industries

  • 30
    (3 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    4.8

    Value

    5.0

    Would Recommend

    5.0
    $1,000+
    10 - 49 employees
    Seattle, WA
    TekByt LLC is a web design agency established in 2024. They are in Seattle, Washington and have a small team. Their services include Web Design, UX/UI Design, Custom Software Development, Web Development, and more.
    Read More

    Industries

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