Top 100 Software Development Companies in Seattle
The Best of May 2026
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.
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List of the Best Seattle Software Developers
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$50,000+1,000 - 9,999 employeesNew York, NYVention is an IT staff augmentation company. Their large team is in New York, New York; London, England; Marietta, Georgia and San Francisco, California. The company focuses on IT staff augmentation, Custom Software Development, Web Development, Mobile App Development, and more. The company was launched in 2002.Read More
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$10,000+10 - 49 employeesMedina, WAFlower Press Interactive is a Medina, Washington-based UX agency. The small team focuses on UX/UI Design, Mobile App Development, Custom Software Development, Web Design, and more and was established in 2001.Read More
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31$5,000+10 - 49 employeesBellevue, WARead More
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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World VisionIndustries
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32$25,000+10,000+ employeesBellevue, WAPersistent Systems is a data analytics company. Established in 1990, the large agency is headquartered in Pune, India; Santa Clara, California; Paris, France and Lyne, England. Their services include BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, Custom Software Development, and more.Read More
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33$5,000+10,000+ employeesSeattle, WAGlobant is a large web development firm. They offer Web Development and Custom Software Development and were founded in 2003.Read More
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34$10,000+10 - 49 employeesSeattle, WADura Digital, an IT managed services company, is located in Edmonton, Canada; Montevideo, Uruguay and Seattle, Washington. Launched in 2020, the small team offers IT managed services, IT staff augmentation, web development, and mobile app development.Read More
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35$10,000+50 - 249 employeesSeattle, WALocated in Mission, Kansas; Atlanta, Georgia; Dallas, Texas and Nashville, Tennessee, SoftDoes is a Generative AI company. The midsize company was launched in 2019. Their services include Generative AI, AI Consulting, Artificial Intelligence, Custom Software Development, and more.Read More
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FMY OrthodonticsIndustries
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36$1,000+250 - 999 employeesBellevue, WARead More
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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37$1,000+10 - 49 employeesNewcastle, WAHyperBeans is a web development firm headquartered in Newcastle, Washington. The agency offers Web Development, Mobile App Development, Custom Software Development, Enterprise App Modernization, and more and has a small team.The agency was launched in 2011.Read More
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38$5,000+2 - 9 employeesBurien, WASandcastle Web Design and Development is a software development company established in 1998. The team specializes in Custom Software Development and Mobile App Development.Read More
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Aviation Supplies & Academics Cevala / Brandvia Allegiant Commercial Asset Services GroupIndustries
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39$10,000+10 - 49 employeesSeattle, WARead More
Helpful Human is a development agency based in Seattle. Since 2013, their team of 15 has been specializing in web design and development, mobile app development, and UX/UI design. They work primarily with small businesses in the information services and business services industries.
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Rudy'sIndustries
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40$10,000+10 - 49 employeesSeattle, WAAlly, a web design company, was launched in 2025. They are based in Seattle, Washington and have a small team. Ally provides Web Design, UX/UI Design, Custom Software Development, Web Development, and more.Read More
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41$1,000+10 - 49 employeesRedmond, WAAstrabitLLC is a software development firm founded in 2025. The small Redmond, Washington-based team provides Custom Software Development, Web Development, Mobile App Development, Artificial Intelligence, and more.Read More
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42$1,000+50 - 249 employeesSeattle, WAFive Quantum Bits is a midsize app development firm founded in 2013. Their team specializes in Mobile App Development, Artificial Intelligence, Custom Software Development, and Web Development. The agency is based in Seattle, Washington.Read More
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43$25,000+2 - 9 employeesSeattle, WACodble is a Seattle, Washington-based application development firm. Founded in 2020, the small team offers Mobile App Development, Custom Software Development, Web Development, IT strategy consulting, and more.Read More
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44$1,000+50 - 249 employeesSeattle, WAConnectPOS is a software development firm. They were founded in 2013 and specialize in Custom Software Development and Application Management & Support.Read More
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45$100,000+50 - 249 employeesSeattle, WALaunched in 2000, Carbon Five is a custom software development company. Their team specializes in Custom Software Development and Mobile App Development.Read More
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46$10,000+10 - 49 employeesSeattle, WAPalador is a small custom software development firm headquartered in Seattle, Washington and Yogyakarta, Indonesia. Their services include Custom Software Development and Enterprise App Modernization.Read More
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47$5,000+10 - 49 employeesSeattle, WALaunched in 2017, Fenyx Studio is a mobile app development company. The small team specializes in Mobile App Development and Web Development.Read More
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48$10,000+50 - 249 employeesSeattle, WADMC, Inc., a custom software development firm, is based in Chicago, Illinois and Somerville, Massachusetts. The team provides Custom Software Development and CRM consulting and SI.Read More
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3MIndustries
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49Undisclosed250 - 999 employeesBellevue, WAFresh Consulting is a custom software development firm established in 2007. The midsize team provides Custom Software Development and UX/UI Design.Read More
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50$10,000+250 - 999 employeesBellevue, WASOUTHWORKS is a midsize custom software development firm. They offer Custom Software Development and cloud consulting & SI and were launched in 2004.Read More
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51Undisclosed250 - 999 employeesKirkland, WAKopius, Inc. Is a custom software development firm. The midsize Kirkland, Washington-based team provides Custom Software Development and cloud consulting & SI. The agency was launched in 2017.Read More
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52Undisclosed50 - 249 employeesLynnwood, WAEstablished in 1994, TransAct Communications, LLC is a custom software development company. The agency focuses on Custom Software Development and Translation.Read More
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53$5,000+10 - 49 employeesSeattle, WACaravel Labs is a software development firm. The Seattle, Washington-based firm specializes in Custom Software Development and Mobile App Development.Read More
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54$1,000+250 - 999 employeesRedmond, WAHarbinger Group is an AI company. The Redmond, Washington-based team specializes in Artificial Intelligence and Custom Software Development.Read More
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55$5,000+10 - 49 employeesSeattle, WAAMP Creative is a Corporate Training & Coaching company. The Dallas, Texas-based company was launched in 2002. Their services include Corporate Training & Coaching and Video Production.Read More
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56Undisclosed50 - 249 employeesIssaquah, WAIn Issaquah, Washington, FluentPro Software Corporation is an IT strategy consulting company. The team specializes in IT strategy consulting and BI & big data consulting & SI.Read More
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57Undisclosed2 - 9 employeesKirkland, WAEstablished in 2016, PiorSoft, a small software development company, is located in Kirkland, Washington. Their team offers Custom Software Development.Read More
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58$250,000+2 - 9 employeesRenton, WACoreUs is a software development firm. The Renton, Washington-based company provides Custom Software Development and UX/UI Design.Read More
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59$5,000+2 - 9 employeesFederal Way, WABeamshift is a software development firm. Their small team is in Federal Way, Washington and specializes in Custom Software Development and Web Development. The agency was founded in 2024.Read More
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60$25,000+250 - 999 employeesRedmond, WABased in Redmond, Washington and Virgin Islands (U.S.), Plain Concepts is an AI firm. They focus on Artificial Intelligence and BI & big data consulting & SI and were established in 2006.Read More
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Check out a Software Developers in Seattle with the most new reviews in the past 12 months.
Most Reviewed
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