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
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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
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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.
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61Undisclosed50 - 249 employeesBellevue, WALaunched in 2009, Witekio, a midsize user experience design agency, is in Lyon, France and Bellevue, Washington. Their services include UX/UI Design and Cybersecurity.Read More
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62$25,000+50 - 249 employeesSeattle, WAAssemble is a midsize e-commerce development company based in Seattle, Washington. Their services include E-Commerce Development and Custom Software Development.Read More
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63$75,000+50 - 249 employeesSeattle, WATangoTeams, a midsize website development company, is in Seattle, Washington. Their services include Web Development and Mobile App Development.Read More
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64Undisclosed10 - 49 employeesSeattle, WAIn Seattle, Washington, Schema Design is a small graphic design company. Their services include Graphic Design and Custom Software Development.Read More
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65$10,000+250 - 999 employeesBellevue, WAConfiz, an IT staff augmentation company, is in Bellevue, Washington and Dubai, United Arab Emirates. Launched in 2005, the team offers IT staff augmentation and ERP consulting and SI.Read More
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66$10,000+2 - 9 employeesKent, WAWinnComm, LLC is a software development company. They provide Custom Software Development and Web Development and are based in Jaipur, India and Kent, Washington.Read More
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67Undisclosed10 - 49 employeesSeattle, WALaunched in 2013, iTrellis is a small Seattle, Washington-based cloud consulting & SI company. Their team provides cloud consulting & SI and Custom Software Development.Read More
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68Undisclosed10 - 49 employeesLynnwood, WAInfogentech, a SEO services firm, is headquartered in Delhi, India. The small company was founded in 2024. Their team specializes in search engine optimization, web design, custom software development, web development, and more.Read More
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69$10,000+250 - 999 employeesRedmond, WAQuadrant Resource LLC is an IT strategy consulting company. Established in 2004, the team focuses on IT strategy consulting and IT managed services. The agency is located in Redmond, Washington.Read More
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70$10,000+2 - 9 employeesSeattle, WANull Unit, a custom software development firm, was established in 2017. The agency specializes in Custom Software Development and UX/UI Design, and is small.Read More
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71Undisclosed10 - 49 employeesRedmond, WAAstrabitLLC is a software development firm. The firm is headquartered in Redmond, Washington. Their services include Custom Software Development and Web Development.Read More
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72$50,000+50 - 249 employeesWoodinville, WAEstablished in 1996, Redapt is a cloud consulting & SI company. The agency focuses on cloud consulting & SI and BI & big data consulting & SI, and is midsize.Read More
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73$100,000+10 - 49 employeesSeattle, WAChaos Theory Studios is a custom software development company launched in 2013. In Seattle, Washington, the team offers Custom Software Development and AR/VR development.Read More
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74$25,000+10 - 49 employeesSeattle, WAOctoon Technologies is a Seattle, Washington-based Digital Strategy company. The team offers Digital Strategy and Social Media Marketing.Read More
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75$1,000+10 - 49 employeesRedmond, WAWebtual Global Inc., a custom software development company, was founded in 2019. The company offers Custom Software Development and Enterprise App Modernization.Read More
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76$5,000+2 - 9 employeesSeattle, WAFounded in 2019, Dark Matter Digital is a Digital Strategy company. Their services include Digital Strategy and UX/UI Design.Read More
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77$1,000+2 - 9 employeesBothell, WASmall Application Testing company Autonomicsoft Solutions LLC, is located in Bothell, Washington. Their services include Application Testing and ERP consulting and SI.Read More
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78$5,000+10 - 49 employeesKirkland, WAMeydenbauer Partners, an IT strategy consulting company, is based in Kirkland, Washington. They specialize in IT strategy consulting and CRM consulting and SI.Read More
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79Undisclosed10 - 49 employeesSeattle, WAUX design company Hawk Tech Universe is located in Seattle, Washington. They focus on UX/UI Design and IT strategy consulting and were founded in 2024.Read More
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80$1,000+10 - 49 employeesSeattle, WASmall branding agency Homeworld, is based in Seattle, Washington. The team provides Branding and Marketing Strategy.Read More
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81$5,000+10 - 49 employeesKirkland, WAFacet Digital, LLC is a website development firm founded in 2013. The small team offers Web Development and Mobile App Development.Read More
Industries
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82$1,000+2 - 9 employeesSeattle, WAHeliopath Labs is a video production company. The Seattle, Washington-based firm was launched in 2020. Their services include Video Production and Custom Software Development.Read More
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83$10,000+2 - 9 employeesBellevue, WATechufy Inc is a Bellevue, Washington-based Product Design company. They provide Product Design and Custom Software Development.Read More
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84$5,000+2 - 9 employeesSeattle, WAV37 is a custom software development company located in Seattle, Washington. Launched in 2022, the team specializes in Custom Software Development and Web Development.Read More
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85$1,000+2 - 9 employeesSeattle, WABookable Retail is a Seattle, Washington-based web development firm. Founded in 2022, the team provides Web Development and Web Design.Read More
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86$1,000+2 - 9 employeesSeattle, WAAI Consulting company 3rd Interval is in Seattle, Washington. The team provides AI Consulting and Custom Software Development.Read More
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87$5,000+10 - 49 employeesSeattle, WALocated in Seattle, Washington, Rooster Park Consulting is a software development firm. They focus on Custom Software Development and IT staff augmentation and were founded in 2008.Read More
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DisneyIndustries
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88$5,000+10 - 49 employeesSeattle, WALabKey is a small software development company located in Seattle, Washington and San Diego, California. The team offers Custom Software Development and cloud consulting & SI.Read More
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MITIndustries
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89Undisclosed10 - 49 employeesKirkland, WAJetstream Software, Inc., a software development company, provides Custom Software Development and AR/VR development. The agency is located in Kirkland, Washington.Read More
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90Undisclosed50 - 249 employeesKirkland, WADev9 is a custom software development company. The team is headquartered in Kirkland, Washington, and their services include Custom Software Development and IT managed services.Read More
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