Top 100 Software Development Companies in Seattle
The Best of May 2026List of the Best Seattle Software Developers
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$10,000+10 - 49 employeesIrvine, CAKingsmen Digital Ventures, a software development company, is located in Irvine, California. The small team provides Custom Software Development, Mobile App Development, and UX/UI Design and was founded in 2017.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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1$50,000+250 - 999 employeesSeattle, WAJelvix is a midsize software development company founded in 2011. Their services include Custom Software Development, Mobile App Development, Artificial Intelligence, and cloud consulting & SI. The agency is headquartered in Tallinn, Estonia; Kharkiv, Ukraine; Stuttgart, Germany and London, England.Read More
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Tiber Capital GroupIndustries
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2$25,000+10 - 49 employeesSeattle, WAFounded in 2010, Bilberrry is a custom software development firm. They are in Seattle, Washington and have a small team. The firm offers Custom Software Development, IT staff augmentation, Web Design, Web Development, and more.Read More
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Days for GirlsIndustries
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3$10,000+250 - 999 employeesBellevue, WABased in Bellevue, Washington; Dublin, Ireland and Fayetteville, Arkansas, Affirma Consulting is a custom software development company. The midsize firm was established in 2001. Their services include Custom Software Development, AI Consulting, Generative AI, Mobile App Development, and more.Read More
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MicrosoftIndustries
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4$5,000+50 - 249 employeesSeattle, WAWeb design company UPQODE was founded in 2015. Located in Nashville, Tennessee; New York, New York; Tampa, Florida and Seattle, Washington, their midsize team specializes in Web Design, Web Development, UX/UI Design, Custom Software Development, and more.Read More
Clients
Gracenote - Entertainment ProvidersIndustries
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5$25,000+250 - 999 employeesKirkland, WAEstablished in 2000, Nearsure, a Nortal company is an IT strategy consulting company. Their midsize team is in Montevideo, Uruguay; Kirkland, Washington; Envigado, Colombia and Sao Paulo, Brazil. Their team specializes in IT strategy consulting, IT staff augmentation, IT managed services, Custom Software Development, and more.Read More
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Health CatalystIndustries
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6$25,000+10 - 49 employeesSeattle, WAUpTop, an user experience company, was launched in 2000. They are located in Seattle, Washington and have a small team. UpTop provides UX/UI Design, Custom Software Development, and Mobile App Development.Read More
Clients
Amazon F5 SAP Concur Pearson Packaging SystemsIndustries
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7$25,000+10 - 49 employeesSeattle, WACulture 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.Read More
Clients
24 Hour FitnessIndustries
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8$5,000+10 - 49 employeesSeattle, WARead More
Slashdev is a small custom software development firm based in Winter Park, Florida; London, England; Stockholm, Sweden and San Diego, California. They specialize in Custom Software Development, Web Development, Mobile App Development, IT staff augmentation, and more and were founded in 2020.
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9$50,000+10 - 49 employeesSeattle, WAATOMICUS, 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.Read More
Clients
BRUKER CAMECA AMETEK Hitachi High-TechIndustries
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10$25,000+50 - 249 employeesSeattle, WAMobcoder, 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.Read More
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General millsIndustries
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11$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
Clients
SheSports Brown Bear Car Wash Common Sense Privacy Applied Stem CellIndustries
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12$10,000+10,000+ employeesBellevue, WABeyondsoft Consulting Inc., an IT strategy consulting company, is located in Bellevue, Washington. They provide IT strategy consulting, BI & big data consulting & SI, cloud consulting & SI, Custom Software Development, and more and were founded in 1995.Read More
Clients
HPIndustries
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13$50,000+50 - 249 employeesSeattle, WAThirstySprout is an IT staff augmentation company. They are based in Seattle, Washington; San Francisco, California; Austin, Texas and Buenos Aires, Argentina and have a midsize team. The company provides IT staff augmentation, Generative AI, Custom Software Development, Web Development, and more.Read More
Clients
Rover.comIndustries
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14$25,000+2 - 9 employeesEdmonds, WABlack Antelope, a web development company, is based in Edmonds, Washington. They focus on Web Development, UX/UI Design, Custom Software Development, E-Commerce Development, and more and were established in 2009.Read More
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UC Berkeley (Berkeley, CA)Industries
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15$25,000+2 - 9 employeesSeattle, WARead More
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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DDM ImportsIndustries
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16$5,000+250 - 999 employeesKirkland, WAEstablished 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.Read More
Clients
AJ Produkter Ginza TargetAid EntitledToIndustries
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17$10,000+50 - 249 employeesKirkland, WARead More
Founded in 2013, AccelOne is an artificial intelligence firm. They are headquartered in Kirkland, Washington; Buenos Aires, Argentina and Mission Viejo, California and have a midsize team. The firm offers Artificial Intelligence, Generative AI, IT managed services, IT staff augmentation, and more.
Clients
XapoIndustries
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18$25,000+50 - 249 employeesSeattle, WARead More
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.
Clients
Mercedes-BenzIndustries
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19$1,000+50 - 249 employeesSeattle, WARead More
Based in Seattle, Washington, NTSprint LLC is a custom software development company. The midsize team offers Custom Software Development, Web Development, Mobile App Development, Web Design, and more. The firm was established in 2016.
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20Undisclosed1,000 - 9,999 employeesKingston, WARoom 8 Group, an app development firm, was founded in 2011. They specializes in Mobile App Development and Custom Software Development.Read More
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21$25,000+50 - 249 employeesSeattle, WADevblock / Db_studio is a custom software development firm. Established in 2008, the agency is located in Seattle, Washington and Ho Chi Minh, Vietnam. The midsize team specializes in Custom Software Development, AI Consulting, Product Design, Web Development, and more.Read More
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22$5,000+50 - 249 employeesSeattle, WAHeadquartered 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.Read More
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23Undisclosed50 - 249 employeesSeattle, WARead More
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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ReachNow -
24$5,000+1,000 - 9,999 employeesBellevue, WAInsight Global, a big data analytics company, provides BI & big data consulting & SI and cloud consulting & SI. The firm is located in Atlanta, Georgia and Birmingham, Alabama.Read More
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25$10,000+2 - 9 employeesSeattle, WALaunched 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
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26$25,000+2 - 9 employeesSeattle, WARead More
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.
Clients
University of Washington -
27$10,000+50 - 249 employeesBellevue, WARead More
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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28$10,000+10 - 49 employeesLynnwood, WAAI firm Techlusion LLC is headquartered in Lynnwood, Washington and Ahmedabad, India. The small team offers Artificial Intelligence, Custom Software Development, cloud consulting & SI, Mobile App Development, and more. The firm was launched in 2022.Read More
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29$5,000+50 - 249 employeesSeattle, WAApp development firm Elluminati is headquartered in Dubai, United Arab Emirates; Seattle, Washington; Rajkot, India and Morada dos Pinheiros (Aldeia da Serra), Brazil. The midsize agency was launched in 2012. Their team offers Mobile App Development and Custom Software Development.Read More
Clients
SwiftBacks BaronFleet Gozem UlitransIndustries
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30$50,000+10 - 49 employeesSeattle, WANew Normal, an application development firm, was founded in 2012. Their small team is located in Seattle, Washington and focuses on Mobile App Development, Custom Software Development, Web Development, UX/UI Design, and more.Read More
Clients
AmazonIndustries
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