Top 100 Software Development Companies in Seattle
The Best of December 2025
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. Regardless of the industry, you’ll be able to find a solution for your business, and if you can’t, partnering with a software company to develop your project is the best way to go. These developers are great at creating bespoke solutions that meet your needs and help you reach your goals.
By browsing The Manifest's platform, learn more about the best software development companies in Seattle today. Their platform provides an extensive list of the best B2B service providers in Seattle, where you can also find the roster of the leading local software developers. Visit their site to learn more.
List of the Best Seattle Software Developers
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$10,000+10 - 49 employeesIrvine, CAKingsmen Digital Ventures is a software development firm. Their small team is located in Irvine, California. The firm specializes in Custom Software Development, Mobile App Development, UX/UI Design, E-Commerce Development, and more.Read More
Industries
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$25,000+10 - 49 employeesMedina, WAFlower 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.Read More
Industries
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$10,000+10 - 49 employeesJohannesburg, South AfricaRead More
Mobile application development firm CubeZoo was established in 2011. In Johannesburg, South Africa and London, England, their small team specializes in Mobile App Development, Web Development, Artificial Intelligence, UX/UI Design, and more.
Industries
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91Undisclosed1,000 - 9,999 employeesSeattle, WACloud consulting & SI company F5 was established in 1996. The team specializes in cloud consulting & SI and Custom Software Development and is in Seattle, Washington and Billerica, Massachusetts.Read More
Industries
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92$1,000+2 - 9 employeesSeattle, WAIn Seattle, Washington, PNW Design Consulting is a web design agency. Launched in 2020, the team focuses on Web Design and Custom Software Development.Read More
Industries
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93$100,000+10 - 49 employeesBellevue, WAVirtue Tech Inc is a cloud consulting & SI company. The firm is in Bellevue, Washington. Their services include cloud consulting & SI and BI & big data consulting & SI.Read More
Industries
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94$50,000+10 - 49 employeesSeattle, WAFounded in 2021, Chaos Theory Studios, LLC is an user experience agency. Their team provides UX/UI Design and Custom Software Development.Read More
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95$10,000+10 - 49 employeesSeattle, WAAmberteq is a small Enterprise App Modernization company. Founded in 2018, the team offers Enterprise App Modernization and cloud consulting & SI.Read More
Industries
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96$5,000+2 - 9 employeesSeattle, WARead More
Founded in 2003, Swecker is a Seattle-based web development agency that serves small and mid-market businesses. In addition to web development, the team of fewer than 10 also offers mobile app and custom software development and design.
Clients
MicrosoftIndustries
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97$5,000+50 - 249 employeesSeattle, WAApplication development firm Qodestar was established in 2022. They are based in Seattle, Washington; Nashville, Tennessee; New York, New York and Tampa, Florida and have a midsize team. Their services include Mobile App Development, UX/UI Design, Mobile & App Marketing, Product Design, and more.Read More
Industries
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98Undisclosed2 - 9 employeesSeattle, WAActus Consulting Group is a small Seattle, Washington-based CRM consulting and SI and custom software development company. Their services include CRM consulting and SI and Custom Software Development.Read More
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99$1,000+10 - 49 employeesKent, WAEstablished in 2021, DigiCorders is a social media marketing firm. The team provides Social Media Marketing and Content Marketing.Read More
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100Undisclosed10 - 49 employeesBellevue, WAMerito Solutions, Inc, a software development company, was established in 2013. Located in Bellevue, Washington, the team offers Custom Software Development and Application Testing.Read More
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101Undisclosed250 - 999 employeesSeattle, WARead More
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.
Clients
VontoIndustries
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102Undisclosed250 - 999 employeesKirkland, WAMotion Automation Intelligence is a Robotics Process Automation company. The Kirkland, Washington-based team focuses on Robotics Process Automation and Custom Software Development.Read More
Industries
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103Undisclosed250 - 999 employeesBellevue, WAAuth0 by Okta is a cloud consulting & SI company. Their midsize team is based in Bellevue, Washington and provides cloud consulting & SI and Custom Software Development. The firm was founded in 2013.Read More
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104Undisclosed50 - 249 employeesRedmond, WAFlexasoft is a software development company. The team provides Custom Software Development and Business Consulting and is located in Redmond, Washington.Read More
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105Undisclosed50 - 249 employeesSeattle, WASolluCIO Partners is a Cybersecurity company headquartered in Seattle, Washington. The team provides Cybersecurity and Business Consulting.Read More
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106Undisclosed50 - 249 employeesSammamish, WADatadigm, a midsize custom software development firm, is located in Sammamish, Washington. The team specializes in Custom Software Development and IT strategy consulting.Read More
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107Undisclosed50 - 249 employeesSeattle, WAMidsize Cybersecurity company Envorso, is headquartered in Seattle, Washington and Detroit, Michigan. The team focuses on Cybersecurity and Custom Software Development.Read More
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108Undisclosed2 - 9 employeesSeattle, WABuoy Development is a software development company. They are based in Seattle, Washington and have small team of experts. Their services include Custom Software Development.Read More
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109Undisclosed10 - 49 employeesSeattle, WABLG Technologies (P) Ltd., a custom software development company, was launched in 2017. They offers Custom Software Development and cloud consulting & SI.Read More
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110$5,000+2 - 9 employeesWoodinville, WABlue K LLC is a custom software development company established in 2005. Their services include Custom Software Development and IT managed services.Read More
Industries
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111Undisclosed2 - 9 employeesBellevue, WAComputer Engineering company PositiveSine, Inc. Is located in Bellevue, Washington. They focus on Computer Engineering and Custom Software Development.Read More
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112Undisclosed2 - 9 employeesSeattle, WAIn Seattle, Washington, Niftmint is a small Blockchain company. Their services include Blockchain and Custom Software Development.Read More
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113Undisclosed10 - 49 employeesSeattle, WASnaps Technology is a custom software development company headquartered in Seattle, Washington and Kolkata, India. The team provides Custom Software Development and E-Commerce Development.Read More
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114Undisclosed10 - 49 employeesBremerton, WAPOWTEC SOLUTIONS, LLC is a Bremerton, Washington-based custom software development firm. Their services include Custom Software Development and IT managed services.Read More
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115Undisclosed10 - 49 employeesSeattle, WAITrellis, LLC is a data analytics company headquartered in Seattle, Washington. Founded in 2013, the team specializes in BI & big data consulting & SI and cloud consulting & SI.Read More
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116Undisclosed10 - 49 employeesPoulsbo, WAVelosys, a software development company, specializes in Custom Software Development and IT strategy consulting. The company is located in Poulsbo, Washington.Read More
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117UndisclosedFreelancer employeesKirkland, WAIT strategy consulting and software development company Fusion Technology was launched in 2022. The team specializes in IT strategy consulting and Custom Software Development.Read More
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118Undisclosed50 - 249 employeesSeattle, WAPensar Development is a Seattle, Washington-based Product Design company. They focus on Product Design and Custom Software Development.Read More
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119Undisclosed50 - 249 employeesBellevue, WABusiness Consulting company Prime 8 Consulting is in Bellevue, Washington. Their services include Business Consulting and Custom Software Development.Read More
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120Undisclosed50 - 249 employeesSeattle, WAFormidable is an IT managed services company. They are headquartered in Seattle, Washington and London, England. Their team specializes in IT managed services and Custom Software Development.Read More
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