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UPDATED September, 2021

80 Software Development Agencies & Firms in Seattle

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How do you hire a software development company in Seattle for your business? To find the right company, follow these steps:

  1. Make your RFP as specific as you can. Be sure to highlight your end goals and prioritize your feature list.
  2. Determine if your software development team’s location is important to you. With experienced and well-qualified teams located around the world, you’ll never run out of options. While nearshore and onshore software development companies are often easier to collaborate with due to their location, offshore software developers can be more affordable.
  3. Pay potential software developers to work with you on a small project. By bringing 2-3 of your top candidates on board temporarily, you’ll be able to assess the quality of their work and how well you collaborate with their team.

With hundreds of software development agencies to choose from, how do you get started? Our list of the best software development agencies includes client reviews, minimum project size, team size, specialty services, and client focus. Define the services you need, project goals, and budget to begin narrowing your choices. If you need help creating a shortlist, tell us about your project and receive personalized recommendations.

List of the Best Software Development Companies in The Emerald City

Seattle, WA
10 - 49 employees
$25,000+
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Bilberrry, a web design agency, is based in Seattle, Washington and Kyiv, Ukraine. The team focuses on web design, custom software development, and web development.

Services

Custom Software Development Web Design Web Development

Client Focus

15% Small Business (<$10M)
35% Midmarket ($10M - $1B)
50% Enterprise (>$1B)
Medina, WA
10 - 49 employees
$10,000+
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Flower Press Creative Studio, LLC is an UX agency. They were launched in 2001, and their services include ux/ui design, web design, web development, custom software development, and more.

Services

Custom Software Development UX/UI Design Web Design Web Development Logo

Client Focus

30% Small Business (<$10M)
35% Midmarket ($10M - $1B)
35% Enterprise (>$1B)
Seattle, WA
2 - 9 employees
$10,000+
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Custom software development firm Black Antelope offers custom software development, web development, web design, ux/ui design, and more. They were established in 2009.

Services

Custom Software Development Web Development Web Design E-Commerce Development UX/UI Design

Client Focus

30% Small Business (<$10M)
40% Midmarket ($10M - $1B)
30% Enterprise (>$1B)
Need help selecting a company?

Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with an analyst.

Free Consultation
Bellevue, WA
10,000+ employees
$10,000+
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Beyondsoft Consulting Inc. Is a business intelligence company launched in 1995. The company focuses on BI & big data consulting & SI, cloud consulting & SI, IT strategy consulting, custom software development, and more, and is large.

Services

Custom Software Development BI & Big Data Consulting & SI Cloud Consulting & SI Enterprise App Modernization IT Strategy Consulting

Client Focus

30% Midmarket ($10M - $1B)
70% Enterprise (>$1B)
Seattle, WA
2 - 9 employees
$25,000+
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Website development company Lunarbyte.io is based in Seattle, Washington. Established in 2019, the team provides web development, custom software development, and mobile app development.

Services

Custom Software Development Web Development Mobile App Development

Client Focus

50% Small Business (<$10M)
30% Midmarket ($10M - $1B)
20% Enterprise (>$1B)
Olympia, WA
250 - 999 employees
$10,000+
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Esteemed is a website development company. The Olympia, Washington-based team provides web development, web design, and custom software development.

Services

Custom Software Development Web Design Web Development

Client Focus

20% Small Business (<$10M)
70% Midmarket ($10M - $1B)
10% Enterprise (>$1B)
Seattle, WA
10 - 49 employees
$10,000+
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Helpful Human is a website development firm founded in 2013. The team specializes in web development, custom software development, ux/ui design, mobile app development, and more.

Services

Custom Software Development Web Development Mobile App Development UX/UI Design E-Commerce Development

Client Focus

40% Small Business (<$10M)
35% Midmarket ($10M - $1B)
25% Enterprise (>$1B)
Seattle, WA
10 - 49 employees
$25,000+
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Mobile app development company Zazz was launched in 2011. The team focuses on mobile app development, ux/ui design, custom software development, enterprise app modernization, and more and is located in Seattle, Washington and San Francisco, California.

Services

Custom Software Development Mobile App Development UX/UI Design Enterprise App Modernization Mobile & App Marketing

Client Focus

30% Small Business (<$10M)
40% Midmarket ($10M - $1B)
30% Enterprise (>$1B)
Seattle, WA
2 - 9 employees
$5,000+
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Zwinny is an application management & support company. The small Seattle, Washington-based team offers application management & support and custom software development. The firm was established in 2019.

Services

Custom Software Development Application Management & Support

Client Focus

100% Small Business (<$10M)
Seattle, WA
10 - 49 employees
$1,000+
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Digitegy is a Seattle, Washington-based web design agency. The team focuses on web design, custom software development, web development, digital strategy, and more.

Services

Custom Software Development Web Design Web Development Digital Strategy Search Engine Optimization
Kirkland, WA
2 - 9 employees
$1,000+
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Application development company CASoft Seattle offers mobile app development, search engine optimization, web design, web development, and more. They are based in Kirkland, Washington.

Services

Custom Software Development Mobile App Development Search Engine Optimization Web Design Web Development

Client Focus

100% Small Business (<$10M)
Seattle, WA
2 - 9 employees
$5,000+
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SWECKER is a Seattle, Washington-based web development company. Their services include web development, web design, custom software development, mobile app development, and more.

Services

Custom Software Development Web Development Web Design Mobile App Development Digital Strategy

Client Focus

60% Small Business (<$10M)
40% Midmarket ($10M - $1B)
Bellevue, WA
10 - 49 employees
$10,000+
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ProCogia is a software development firm. The company is headquartered in Vancouver, Canada and Bellevue, Washington. Their services include custom software development, Artificial Intelligence, BI & big data consulting & SI, cloud consulting & SI, and more.

Services

Custom Software Development Artificial Intelligence BI & Big Data Consulting & SI Cloud Consulting & SI IoT Development

Client Focus

80% Small Business (<$10M)
20% Midmarket ($10M - $1B)
Seattle, WA
50 - 249 employees
Undisclosed
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UX design agency Smashing Ideas is based in Seattle, Washington. They specialize in ux/ui design, IT strategy consulting, mobile app development, custom software development, and more.

Services

Custom Software Development UX/UI Design IT Strategy Consulting Mobile App Development Web Design
Seattle, WA
250 - 999 employees
Undisclosed
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Projekt202 is a midsize custom software development firm in Addison, Texas; Austin, Texas; Seattle, Washington and San Francisco, California. The team specializes in custom software development, ux/ui design, mobile app development, web development, and more.

Services

Custom Software Development Mobile App Development UX/UI Design Web Development Web Design
Kirkland, WA
50 - 249 employees
$25,000+
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Heaven Solutions is an IT staff augmentation company. Headquartered in Kirkland, Washington; Iași, Romania; Bensheim, Germany and Il-Gżira, Malta, the agency was established in 2005. Their services include IT staff augmentation, application testing, custom software development, web development, and more.

Services

Custom Software Development Application Testing IT Staff Augmentation Artificial Intelligence Mobile App Development

Client Focus

30% Midmarket ($10M - $1B)
70% Enterprise (>$1B)
Seattle, WA
2 - 9 employees
$25,000+
Visit Site
Software development company Northwest Independent Ruby Development was launched in 2011. The agency specializes in custom software development and web development, and is small.

Services

Custom Software Development Web Development
Seattle, WA
250 - 999 employees
$25,000+
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Neudesic, a big data company, is headquartered in Irvine, California; Lombard, Illinois; Irving, Texas and Denver, Colorado. Their services include BI & big data consulting & SI, custom software development, cloud consulting & SI, enterprise app modernization, and more.

Services

Custom Software Development BI & Big Data Consulting & SI Cloud Consulting & SI Enterprise App Modernization Mobile App Development

Client Focus

20% Midmarket ($10M - $1B)
80% Enterprise (>$1B)
Seattle, WA
50 - 249 employees
Undisclosed
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Midsize application development company Deloitte Digital, is in London, United Kingdom; Seattle, Washington and Melbourne, Australia. Their services include mobile app development, web design, web development, and custom software development.

Services

Custom Software Development Mobile App Development Web Design Web Development
Bellevue, WA
10 - 49 employees
$10,000+
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Seattle Software Developers, a software development company, is located in Bellevue, Washington; London, United Kingdom; Rome, Italy and Augsburg, Germany. They provide custom software development, web development, mobile app development, ux/ui design, and more.

Services

Custom Software Development Web Development Mobile App Development Artificial Intelligence UX/UI Design
Seattle, WA
50 - 249 employees
$100,000+
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Carbon Five, a software development company, is located in San Francisco, California; Santa Monica, California; Chattanooga, Tennessee and New York, New York. The team focuses on custom software development, mobile app development, web development, web design, and more.

Services

Custom Software Development Mobile App Development Web Development Web Design Branding

Client Focus

40% Small Business (<$10M)
30% Midmarket ($10M - $1B)
30% Enterprise (>$1B)
Bellevue, WA
50 - 249 employees
$10,000+
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Fresh Consulting is a web design agency. They were founded in 2007, and their services include web design, custom software development, mobile app development, branding, and more.

Services

Custom Software Development Web Design Mobile App Development Branding Content Marketing
Bothell, WA
1,000 - 9,999 employees
Undisclosed
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Custom software development company Endava is based in London, United Kingdom; Atlanta, Georgia; Denver, Colorado and Mendham, New Jersey. They offer custom software development, IT strategy consulting, and enterprise app modernization.

Services

Custom Software Development IT Strategy Consulting Enterprise App Modernization
Redmond, WA
250 - 999 employees
$25,000+
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Plain Concepts, an artificial intelligence company, was founded in 2006. The midsize team specializes in Artificial Intelligence, BI & big data consulting & SI, custom software development, ux/ui design, and more.

Services

Custom Software Development Artificial Intelligence BI & Big Data Consulting & SI UX/UI Design Web Development

Client Focus

20% Midmarket ($10M - $1B)
80% Enterprise (>$1B)
Seattle, WA
50 - 249 employees
$10,000+
Visit Site
DMC, Inc. Is a custom software development company launched in 1996. The team provides custom software development, CRM consulting and SI, unified communications consulting & SI, application testing, and more and is based in Chicago, Illinois; Somerville, Massachusetts; Denver, Colorado and Houston, Texas.

Services

Custom Software Development Application Testing CRM Consulting and SI Unified Communications Consulting & SI Web Development
Seattle, WA
10 - 49 employees
$5,000+
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LabKey is a custom software development company. They were founded in 2005, and their services include custom software development and cloud consulting & SI.

Services

Custom Software Development Cloud Consulting & SI
Seattle, WA
50 - 249 employees
$100,000+
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Theorem, a software development firm, was established in 2007. The midsize team offers custom software development, ux/ui design, IoT development, IT strategy consulting, and more.

Services

Custom Software Development IT Strategy Consulting IoT Development Product Design UX/UI Design

Client Focus

15% Small Business (<$10M)
20% Midmarket ($10M - $1B)
65% Enterprise (>$1B)
Seattle, WA
50 - 249 employees
Undisclosed
Visit Site
Pensar Development is a Seattle, Washington-based product design company. They focus on product design, custom software development, and ux/ui design and were founded in 2001.

Services

Custom Software Development Product Design UX/UI Design
Bellevue, WA
250 - 999 employees
$10,000+
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SOUTHWORKS, a custom software development firm, is based in London, United Kingdom; Bellevue, Washington and Vancouver, Canada. The team focuses on custom software development, cloud consulting & SI, BI & big data consulting & SI, and cybersecurity.

Services

Custom Software Development Cloud Consulting & SI BI & Big Data Consulting & SI Cybersecurity

Client Focus

10% Small Business (<$10M)
50% Midmarket ($10M - $1B)
40% Enterprise (>$1B)
Seattle, WA
2 - 9 employees
$10,000+
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Web design company Sandcastle Web Design and Development was launched in 1998. The small team offers web design, custom software development, e-commerce development, and mobile app development.

Services

Custom Software Development Web Design E-Commerce Development Mobile App Development
Seattle, WA
10 - 49 employees
$10,000+
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Palador, a software development company, was established in 2005. They provides custom software development, enterprise app modernization, ux/ui design, web development, and more.

Services

Custom Software Development Enterprise App Modernization UX/UI Design Web Development Application Management & Support

Client Focus

10% Small Business (<$10M)
50% Midmarket ($10M - $1B)
40% Enterprise (>$1B)
Bellevue, WA
50 - 249 employees
$25,000+
Visit Site
Headquartered in Bellevue, Washington and Wellington, New Zealand, Provoke Solutions is a software development firm. The team specializes in custom software development, enterprise app modernization, ux/ui design, Artificial Intelligence, and more.

Services

Custom Software Development Application Management & Support Artificial Intelligence Enterprise App Modernization IoT Development
Arlington, WA
10 - 49 employees
$10,000+
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FDG Web, Inc, a web design company, was established in 2000. They provides web design, web development, custom software development, and e-commerce development.

Services

Custom Software Development Web Design Web Development E-Commerce Development
Seattle, WA
10 - 49 employees
Undisclosed
Visit Site
Schema Design, a graphic design agency, was established in 2012. The company specializes in graphic design, custom software development, branding, and logo.

Services

Custom Software Development Graphic Design Branding Logo
Redmond, WA
50 - 249 employees
Undisclosed
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Custom software development company Flexasoft was founded in 2007. The firm offers custom software development, business consulting, application testing, and IT managed services.

Services

Custom Software Development Application Testing Business Consulting IT Managed Services
Kirkland, WA
10 - 49 employees
Undisclosed
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Jetstream Software, Inc. Is a custom software development firm. They were established in 1994 and offer custom software development.

Services

Custom Software Development
Kirkland, WA
50 - 249 employees
Undisclosed
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Launched in 2010, Dev9 is a midsize Kirkland, Washington-based custom software development firm. Their services include custom software development and IT managed services.

Services

Custom Software Development IT Managed Services
Seattle, WA
10 - 49 employees
Undisclosed
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Snaps Technology is a software development company founded in 2010. The firm provides custom software development, e-commerce development, web design, and web development.

Services

Custom Software Development E-Commerce Development Web Design Web Development
Bellevue, WA
50 - 249 employees
$25,000+
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Redtech is a custom software development firm. Based in Bellevue, Washington, their team offers custom software development, non-voice bpo/back office services, digital strategy, web development, and more.

Services

Custom Software Development Digital Strategy Non-Voice BPO/Back Office Services Web Development UX/UI Design

Client Focus

5% Small Business (<$10M)
55% Midmarket ($10M - $1B)
40% Enterprise (>$1B)
Seattle, WA
10 - 49 employees
$5,000+
Visit Site
Rooster Park Consulting is a Seattle, Washington-based software development company. Launched in 2008, the team focuses on custom software development and IT staff augmentation.

Services

Custom Software Development IT Staff Augmentation
Seattle, WA
2 - 9 employees
Undisclosed
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Founded in 2010, MyWorks Design is a web design company. Headquartered in Fort Worth, Texas and Seattle, Washington, the team offers web design, custom software development, and search engine optimization.

Services

Custom Software Development Web Design Search Engine Optimization
Bellevue, WA
10 - 49 employees
Undisclosed
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Established in 1987, Abasys Technologies Inc is a small custom software development firm. Their services include custom software development, blockchain, e-commerce development, mobile app development, and more.

Services

Custom Software Development Blockchain E-Commerce Development Mobile App Development Web Development
Tacoma, WA
Freelancer employees
Undisclosed
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Matthew Fleming Inc., a custom software development company, was launched in 2001. They offers custom software development, e-commerce development, mobile app development, search engine optimization, and more.

Services

Custom Software Development E-Commerce Development Mobile App Development Search Engine Optimization Web Design
Kirkland, WA
2 - 9 employees
$10,000+
Visit Site
Clocktower Media is a web design company. They offer web design, web development, custom software development, and e-commerce development and are headquartered in Kirkland, Washington.

Services

Custom Software Development Web Design Web Development E-Commerce Development
Seattle, WA
50 - 249 employees
$10,000+
Visit Site
Lunavi is a software development firm established in 2007. The company offers custom software development, cloud consulting & SI, IT managed services, enterprise app modernization, and more, and is midsize.

Services

Custom Software Development Cloud Consulting & SI IT Managed Services Application Management & Support Application Testing

Client Focus

10% Small Business (<$10M)
45% Midmarket ($10M - $1B)
45% Enterprise (>$1B)
Bellevue, WA
2 - 9 employees
$10,000+
Visit Site
Curvine Web Solutions is a software development company. Located in Bellevue, Washington, the agency focuses on custom software development, web design, e-commerce development, and logo.

Services

Custom Software Development Web Design E-Commerce Development Logo
Bellevue, WA
2 - 9 employees
$5,000+
Visit Site
RixiVert Technologies, a custom software development firm, specializes in custom software development, web design, content marketing, and pay per click. The firm is in Bellevue, Washington and Los Angeles, California.

Services

Custom Software Development Web Design Content Marketing Pay Per Click
Kent, WA
2 - 9 employees
$10,000+
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Located in Jaipur, India and Kent, Washington, WinnComm, LLC is a custom software development company. They specialize in custom software development, web development, public relations, social media marketing, and more.

Services

Custom Software Development Web Development Public Relations Social Media Marketing Mobile App Development
Bellevue, WA
50 - 249 employees
Undisclosed
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Prime 8 Consulting is a midsize business consulting company in Bellevue, Washington. The team specializes in business consulting, custom software development, digital strategy, and marketing strategy.

Services

Custom Software Development Business Consulting Digital Strategy Marketing Strategy
Bellevue, WA
2 - 9 employees
Undisclosed
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Slick Development Washington is a web development firm in Bellevue, Washington. Their services include web development, mobile app development, and custom software development.

Services

Custom Software Development Mobile App Development Web Development
Need help selecting a company?

Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with an analyst.

Free Consultation