Top 100 Software Development Companies in Seattle
The Best of November 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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$10,000+10 - 49 employeesIrvine, CAKingsmen Digital Ventures is an application development company. Their small team is based in Irvine, California. Their services include Mobile App Development, Custom Software Development, Artificial Intelligence, and Web Development. The company was established in 2017.Read More
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$10,000+10 - 49 employeesIrvine, CAKingsmen Digital Ventures is an application development company. Their small team is based in Irvine, California. Their services include Mobile App Development, Custom Software Development, Artificial Intelligence, and Web Development. The company was established in 2017.Read More
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31$25,000+50 - 249 employeesSammamish, WAMarkup Designs is a midsize software development firm headquartered in Sammamish, Washington; Noida, India and Dubai, United Arab Emirates. They offer Custom Software Development, AR/VR development, Blockchain, E-Commerce Development, and more and were founded in 2012.Read More
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32$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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33$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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34$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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35$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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36$5,000+10 - 49 employeesKirkland, WAITIRRA, a software development firm, is located in Kirkland, Washington. The small team offers Custom Software Development, Artificial Intelligence, AI Consulting, ERP consulting and SI, and more and was founded in 2008.Read More
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37$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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38$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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39$5,000+50 - 249 employeesClyde Hill, WAGrowth Natives is a SEO agency. They are located in Clyde Hill, Washington and Sahibzada Ajit Singh Nagar, India and have a midsize team that offers Search Engine Optimization, Account-Based Marketing, Email Marketing, Web Design, and more. The company was established in 2019.Read More
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40$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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41$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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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$5,000+1,000 - 9,999 employeesSeattle, WALaunched in 2001, Insight Global is a custom software development firm. The large team specializes in Custom Software Development and Artificial Intelligence.Read More
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45$1,000+10 - 49 employeesBellevue, WADesverso LLC is a web development firm. The firm is in Bellevue, Washington. Their team focuses on Web Development and Mobile App Development.Read More
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46$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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47Undisclosed250 - 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.
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48$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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49$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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50$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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51$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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52$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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53Undisclosed250 - 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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54Undisclosed250 - 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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55Undisclosed50 - 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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56Undisclosed2 - 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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57$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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58$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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59$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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60Undisclosed50 - 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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Check out a Software Developers in Seattle with the most new reviews in the past 12 months.
Most Reviewed
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