Top 100 Software Development Companies in Seattle

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Top 100 Software Development Companies in Seattle

The Best of March 2024

The software development industry has been one of the most influential industries in the whole world. This technology has provided businesses and companies with vast solutions to help tackle their problems and improve their services. 
Jump to Most Reviewed Companies

List of the Best Seattle Software Developers

  • 1
    (30 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
    • Snohomish County Public Utilities
    • Impinj
    • The Live You Can Save

    Industries

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  • 2
    (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
    • Starbucks
    • Caterpillar
    • American Express

    Industries

  • 3
    (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
    • Rigaku

    Industries

  • 4
    (9 Reviews) 4.7
    • Timeliness

      4.4
    • Service Excellence

      4.7
    • 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
    • Microsoft
    • Tokio Marine
    • Team Health

    Industries

  • 5
    (24 Reviews) 4.9
    • Timeliness

      4.8
    • Service Excellence

      4.9
    • Value

      4.6
    • Would Recommend

      5.0
    • $25,000+
    • 10 - 49 employees
    • Medina, WA

    A full-service digital design and development agency, Flower Press Creative Studio takes on mobile app, web, and custom software development projects. Founded in 2001, the small team of 6 is headquartered in Seattle and also has experience in UI/UX design.

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    Clients

    • Insurance Lounge
    • Brown Bear Car Wash
    • Geek Girl Careers
    • World Perspectives

    Industries

  • 6
    (25 Reviews) 4.8
    • Timeliness

      4.6
    • Service Excellence

      4.8
    • Value

      4.3
    • Would Recommend

      4.8
    • $5,000+
    • 250 - 999 employees
    • Kirkland, WA

    Skelia is an IT company that was founded in 2008. Headquartered in Luxembourg, they have service centers in Poland, Ukraine and offices in the U.S., the U.K., and the Netherlands. They are made up of 350 employees and specialize in IT and engineering staff augmentation and building affiliate companies in eastern Europe. They also provide on-demand mobile development, software testing, and RPA services for businesses of all sizes.

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    Clients

    • SiteCore
    • GS1
    • Valo Intranet
    • Televic

    Industries

  • 7
    (8 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
    • Clean the Scene
    • Preflight Mitigator
    • Dollar Flight Club

    Industries

  • 8
    (44 Reviews) 4.9
    • Timeliness

      4.9
    • Service Excellence

      4.9
    • Value

      4.7
    • Would Recommend

      5.0
    • Undisclosed
    • 250 - 999 employees
    • Seattle, WA

    Projekt202 is a software development and marketing company based in Addison, Texas. They were founded in 2003 and have a team of 285 employees. They specialize in custom software development, UX/UI design, and mobile app development to improve their client’s customer and employee experiences. 

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    Clients

    • Vonto
    • Apiture Xpress
    • Les Mills
    • YES Network

    Industries

  • 9
    (21 Reviews) 4.9
    • Timeliness

      5.0
    • Service Excellence

      4.9
    • Value

      4.9
    • Would Recommend

      5.0
    • $5,000+
    • 50 - 249 employees
    • Seattle, WA

    Vinova is an app and game development service based in Singapore. Founded in 2010, the team of 35 employees specializes in mobile app development, web development, and custom software development. They work with small businesses, midmarket businesses, and enterprises, focusing on information technology and gaming.  

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    Clients

    • FWD Insurance
    • Singapore Press Holdings
    • Singapore Safety Driving Center
    • Navig8 Asia

    Industries

  • 10
    (12 Reviews) 4.9
    • Timeliness

      4.8
    • Service Excellence

      4.9
    • Value

      4.3
    • Would Recommend

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

    Founded in 2000, UpTop specializes in UI/UX design but also shines in web and mobile app development. Their team of 50+ are passionate about solving complex problems and increasing revenue for their clients.

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    Clients

    • Amazon
    • Microsoft
    • CenturyLink
    • F5

    Industries

  • 11
    (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 a software development company based in Kirkland, Wash. with offices in Buenos Aires, Argentina. Founded in 2013, AccelOne's team of 25 employees provides custom software development, mobile app development, and UX/UI design services.

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    Clients

    • Xapo
    • Turner Broadcasting
    • HSBC
    • Ziing

    Industries

  • 12
    (30 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 is a software development company based in Seattle. They also have an office in Noida, India. Founded in 2014, their team of 40 employees provides mobile app development, custom software, and web development services to its midmarket and small business clients. They also serve enterprise clients. 

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    Clients

    • General mills
    • Axisbank
    • State of Washington tourism
    • Motherson Group

    Industries

  • 13
    (20 Reviews) 4.9
    • Timeliness

      4.9
    • Service Excellence

      4.9
    • Value

      4.8
    • Would Recommend

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

    Black Antelope is a digital creative industry headquartered in Seattle. It was founded in 2009 and has expanded to additional locations in Sacremento, Calif. and London. Black Antelope has about 3 employees that serve a range of enterprise and small- to mid-sized businesses. Services include custom software development, web development, and web design. 

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    Clients

    • UC Berkeley (Berkeley, CA)
    • UCSF (San Francisco, CA)
    • Monterey Bay Aquarium (Monterey, CA)
    • Fujitsu Laboratories Of America (Sunnyvale, CA)

    Industries

  • 14
    (15 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.

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    Industries

  • 15
    (10 Reviews) 4.7
    • Timeliness

      4.7
    • Service Excellence

      4.7
    • Value

      4.5
    • Would Recommend

      4.9
    • $5,000+
    • 250 - 999 employees
    • Bellevue, WA

    Affirma Consulting is a full-service technology consulting agency. Founded in 2001, Affirma Consulting is based in Seattle, WA with additional offices in Los Angeles, CA, India, Ireland, and Reno, NV. The team of 200+ focuses on consulting for Business Intelligence (BI), Sharepoint, Salesforce, and customer relationship management (CRM) software, they also offer design, marketing, and mobile and web development.

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    Clients

    • Microsoft
    • ESPN
    • Boeing
    • Time

    Industries

  • 16
    (1 Reviews) 5.0
    • Timeliness

      4.5
    • Service Excellence

      5.0
    • 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
    • Philips
    • Johnson Controls
    • Sony Pictures Television
  • 17
    (11 Reviews) 5.0
    • Timeliness

      4.9
    • 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
    • Jirav.com
    • Zillow
    • WeWork Labs

    Industries

  • 18
    (0 Reviews)

    Not yet reviewed.

    • Undisclosed
    • 1,000 - 9,999 employees
    • Kingston, WA

    Large mobile app development company Room 8 Group, is located in Limassol, Cyprus. Launched in 2011, the team focuses on mobile app development, web development, application testing, ux/ui design, and more.

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    Industries

  • 19
    (3 Reviews) 5.0
    • Timeliness

      5.0
    • Service Excellence

      5.0
    • Value

      5.0
    • Would Recommend

      5.0
    • Undisclosed
    • 10 - 49 employees
    • Seattle, WA

    SB Develops is a development agency based in Seattle with no more than 10 experts. They specialize in web development, mobile app development, and UX/UI design solutions for clients that work in the industries of consumer products, IT services, and more.

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    Clients

    • Cuddle Lock

    Industries

  • 20
    (1 Reviews) 5.0
    • Timeliness

      5.0
    • Service Excellence

      5.0
    • Value

      4.5
    • Would Recommend

      5.0
    • $25,000+
    • 50 - 249 employees
    • Bellevue, WA

    Redtech is a custom software development firm. They are located in Bellevue, Washington and have a midsize team. Their services include custom software development, non-voice bpo/back office services, digital strategy, web development, and more. The agency was established in 1995.

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  • 21
    (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
    • Avvo
    • Whitepages
    • Behavioral Tech
  • 22
    (3 Reviews) 5.0
    • Timeliness

      5.0
    • Service Excellence

      5.0
    • 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
    • Bill & Melinda Gates Foundation

    Industries

  • 23
    (1 Reviews) 5.0
    • Timeliness

      5.0
    • Service Excellence

      5.0
    • 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

  • 24
    (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
    • Universal Financial Company
    • Happy Works
    • CredenceOne

    Industries

  • 25
    (2 Reviews) 4.8
    • Timeliness

      4.8
    • Service Excellence

      4.8
    • Value

      4.3
    • Would Recommend

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

    Founded in 2014, PYCOGroup is a development firm. Their team of around 370 employees is based in Brussels, with an additional office around the globe. They focus on custom software, web, and mobile app development.

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    Clients

    • Microsoft
    • American Express
    • Volkswagen
    • Coach

    Industries

  • 26
    (2 Reviews) 4.3
    • Timeliness

      4.8
    • Service Excellence

      4.3
    • Value

      4.8
    • Would Recommend

      4.8
    • $1,000+
    • 10 - 49 employees
    • Seattle, WA
    Based in Ahmedabad, India and New York, New York, Roblinx Infotech LLP is a cloud consulting & SI company. Launched in 2023, the small team specializes in cloud consulting & SI, web development, mobile app development, and e-commerce development.
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    Industries

  • 27
    (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

  • 28
    (14 Reviews) 4.3
    • Timeliness

      4.4
    • Service Excellence

      4.3
    • Value

      4.3
    • Would Recommend

      4.4
    • $50,000+
    • 250 - 999 employees
    • Seattle, WA

    Gaper is a software company founded in San Francisco in 2018. With over 250 professionals, they provide IT staff augmentation, custom software development, and AI solutions to clients ranging from small companies to large businesses.

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    Clients

    • Madera
    • Footmetrics
    • Byonyks
    • The Main Tab

    Industries

  • 29
    (0 Reviews)

    Not yet reviewed.

    • $5,000+
    • 10,000+ employees
    • Seattle, WA

    Globant is a software development company based in Buenos Aires, Argentina, with offices in San Francisco and Mexico City. The company, founded in 2003, has more than 12,500 employees who provide, among others, web development, digital strategy, and social media marketing services to various companies. 

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    Clients

    • Google
    • Electronic Arts
    • Linkedin
    • BBVA
  • 30
    (0 Reviews)

    Not yet reviewed.

    • Undisclosed
    • 1,000 - 9,999 employees
    • Bellevue, WA

    Insight Global, a HR agency, was established in 2001. Headquartered in Atlanta, Georgia; Birmingham, Alabama; Huntsville, Alabama and Phoenix, Arizona, their large team provides HR services.

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    Industries

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