Top 80 JavaScript Development Companies in Seattle
The Best of December 2024
Looking for a top JavaScript developer in Seattle?
If you're hiring a JavaScript developer to help you build or update a website that's responsive and interactive, consider the pros and cons of JavaScript as a programming language. Advantages include its speed because it's executed on the client-side; reduction in server load; and diverse functionality. Disadvantages to consider include security such as bugs on the client-side.
To assist you in your search for a partner, we’ve compiled this list of the top JavaScript development agencies in Seattle. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
>List of the Best Seattle JavaScript Developers
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1
- $5,000+
- 50 - 249 employees
- Seattle, WA
UPQODE is a web design agency based in Nashville, Tennessee; New York, New York; Tampa, Florida and Seattle, Washington. They focus on Web Design, Web Development, UX/UI Design, Custom Software Development, and more and were launched in 2015.Read MoreClients
- Think Tank Team - Samsung Research America
Industries
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2
- $50,000+
- 50 - 249 employees
- Seattle, WA
ThirstySprout is an outsourced development company headquartered in Seattle with an additional office in San Franciso. Founded in 2017, they currently have about 18 employees. They provide IT staff augmentation as well as custom software and web development services to primarily midmarket agencies in IT, e-commerce, and business services.
Clients
- Rover.com
Industries
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3
- $5,000+
- 250 - 999 employees
- Kirkland, WA
UKAD, founded in 2005, is an IT Outsourcing and Staff Augmentation company. Headquartered in Kirkland, WA, with delivery centers in Eastern Europe, their 300+ strong team delivers customized software development solutions. UKAD excels across a broad range of IT services, with deep expertise in Ecommerce, Retail, Logistics, Fintech, and Healthcare.
Clients
- AJ Produkter
- Ginza
- TargetAid
- EntitledTo
Industries
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4
- $25,000+
- 10 - 49 employees
- Seattle, WA
Culture Foundry is a web agency founded in Seattle in 2010 with more than 10 employees. They specialize in digital strategy, web design, and web development solutions for small and mid-market firms in the fields of arts, IT, and financial services.
Clients
- 24 Hour Fitness
Industries
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5
- $25,000+
- 10 - 49 employees
- Seattle, WA
Founded in 2010 in Seattle, Billberry is a software development studio creating custom software, web apps, and digital products in partnership with some of the world's biggest brands. They have a veteran team of fewer than 50 strategists, designers, and developers who work in partnership with clients to help them grow, innovate, and move their businesses forward. Clients include businesses of all sizes in various industries, including business services, consumer products and services, and financial services.
Clients
- Days for Girls
Industries
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6
- $10,000+
- 2 - 9 employees
- Seattle, WA
Gigantic is a web design agency founded in 2020. The agency specializes in web design, ux/ui design, web development, branding, and more and has a small team.
Industries
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7
- $10,000+
- 250 - 999 employees
- Bellevue, WA
Affirma Consulting is a full-service technology consulting agency. Founded in 2001, Affirma Consulting is based in Seattle, WA with additional offices in Los Angeles, CA, India, Ireland, and Reno, NV. The team of 200+ focuses on consulting for Business Intelligence (BI), Sharepoint, Salesforce, and customer relationship management (CRM) software, they also offer design, marketing, and mobile and web development.
Clients
- Microsoft
Industries
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8
- $5,000+
- 10 - 49 employees
- Seattle, WA
Since 2009, ChopDawg.com has created 350+ digital products – from mobile applications and web applications to blockchain and artificial intelligence technologies for startups, Fortune 500s, growing businesses, and non-profits around the globe. Think of ChopDawg.com not as your agency but as your technical partner. Headquartered in Philadelphia, with offices in Boston, Seattle, New York, Atlanta, Washington, D.C., and Los Angeles, Chop Dawg currently has a team of more than 50.
Clients
- Alpha Paw
- Big Brothers Big Sisters
- Choice Home Warranty
- City of Peachtree Corners, Georga
Industries
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9
- $10,000+
- 50 - 249 employees
- Kirkland, WA
AccelOne is an IT strategy consulting company. The midsize Kirkland, Washington-based agency was established in 2013. Their services include IT strategy consulting, IT managed services, Custom Software Development, Web Development, and more.Read MoreClients
- Xapo
Industries
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10
- $25,000+
- 2 - 9 employees
- Seattle, WA
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.
Clients
- DDM Imports
Industries
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11
- $10,000+
- 2 - 9 employees
- Seattle, WA
Sayenko Design is a web design and development agency that specializes in the Shopify platform. The company has about four employees and was founded in 2009. Based in Seattle, Sayenko Design supports small- to medium-sized businesses. They focus on WordPress, PHP, and SQL. Other services include online marketing, branding.
Clients
- Erickson
Industries
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12
- $1,000+
- 2 - 9 employees
- Seattle, WA
A digital marketer based in San Francisco, Randy McCabe offers SEO, PPC, and digital strategy services. They were founded in 2018.
Clients
- Morgan Stanley
Industries
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13
- $25,000+
- 50 - 249 employees
- Seattle, WA
Mobcoder is a software development company based in Seattle. They also have an office in Noida, India. Founded in 2014, their team of 40 employees provides mobile app development, custom software, and web development services to its midmarket and small business clients. They also serve enterprise clients.
Clients
- General mills
Industries
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14
- $5,000+
- 10 - 49 employees
- Seattle, WA
Codersh Web Services is a web agency based in Ahmedabad, India, and founded in 201. With no more than 10 experts, they specialize in web design, web development, and mobile app development services for small firms in the industries of business and IT services, among others.
Clients
- Reinventu Pro
Industries
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15
- $25,000+
- 2 - 9 employees
- Seattle, WA
Black Antelope is a digital creative industry headquartered in Seattle. It was founded in 2009 and has expanded to additional locations in Sacremento, Calif. and London. Black Antelope has about 3 employees that serve a range of enterprise and small- to mid-sized businesses. Services include custom software development, web development, and web design.
Clients
- UC Berkeley (Berkeley, CA)
Industries
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16
- $25,000+
- 10 - 49 employees
- Medina, WA
A full-service digital design and development agency, Flower Press Creative Studio takes on mobile app, web, and custom software development projects. Founded in 2001, the small team of 6 is headquartered in Seattle and also has experience in UI/UX design.
Clients
- Insurance Lounge
Industries
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17
- $1,000+
- 10 - 49 employees
- Bellevue, WA
Fractional CMO is a marketing automation agency with offices in Hyderabad, India and Seattle. Founded in 2017, they comprise 13 employees specializing in content marketing, social media, lead generation, SEO, online branding, and CRM. They work with small and midmarket businesses, primarily in IT, real estate, and manufacturing.
Clients
- Aviso
Industries
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18
- $5,000+
- 10 - 49 employees
- Seattle, WA
Slashdev is a small software development company. The Winter Park, Florida-based company was established in 2021. Their services include custom software development, web development, mobile app development, wearable app development, and more.
Industries
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19
- $1,000+
- 10 - 49 employees
- Seattle, WA
Hero Creative is a Seattle-based media production company founded in 2012. Their team of around 10 employees provides marketing strategy, branding, advertising and web design. They primarily serve enterprise clients in the advertising, hospitality and nonprofit industries.
Clients
- Make-A-Wish Foundation
Industries
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20
- $5,000+
- 10 - 49 employees
- Seattle, WA
Seattle New Media is a website development agency based in Seattle. The agency, founded in 2006, has a team of less than ten that provides, among others, video production, web development, and mobile app development services to various companies and clients.
Clients
- Dr. Tracy
Industries
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21
- $100,000+
- 250 - 999 employees
- Seattle, WA
Founded in 2014, PYCOGroup is a development firm. Their team of around 370 employees is based in Brussels, with an additional office around the globe. They focus on custom software, web, and mobile app development.
Clients
- Microsoft
Industries
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22
- $5,000+
- 10 - 49 employees
- Seattle, WA
Conflare is a web development and design firm in Seattle. It was founded in 2004 and currently has 4 employees. Conflare provides web design and development, branding, digital strategy, and video production services mainly to small business clients.
Clients
- Artisan Electric
Industries
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23
- $50,000+
- 10 - 49 employees
- Seattle, WA
New Normal, founded in 2012, is a software services agency headquartered in Seattle. Their company consists of a team of 22 people who specialize in web development, mobile app development, and e-commerce development. While they mostly work with mid-market businesses, they also work with enterprise and small businesses. The businesses they work with are mostly in the advertising & marketing, e-commerce, and financial services industries.
Clients
- Amazon
Industries
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24
- $25,000+
- 2 - 9 employees
- Seattle, WA
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
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25
- $5,000+
- 50 - 249 employees
- Seattle, WA
Forum One is a full-service digital design firm that was founded in 1997. The company has more than 100 employees in Alexandria, Va., Washington, D.C., and Seattle. Forum One offers web design, UX/UI design, web development, branding, and other digital services for mainly nonprofits and government agencies.
Clients
- Smithsonian Institution (National Museum of African American History & Culture
Industries
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26
- $5,000+
- 10 - 49 employees
- Bellevue, WA
Truu Digital, a website development company, was established in 2012. The small Bellevue, Washington-based team provides web development, conversion optimization, CRM consulting and SI, digital strategy, and more.
Industries
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27
- $10,000+
- 10 - 49 employees
- Seattle, WA
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.
Clients
- Rudy's
Industries
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28
- Undisclosed
- 2 - 9 employees
- Seattle, WA
Perception Builder is a small conversion optimization company in Seattle, Washington. Established in 2011, the team focuses on conversion optimization, search engine optimization, ux/ui design, and web development.
Industries
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29
- $5,000+
- 10 - 49 employees
- Bellevue, WA
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.
Clients
- World Vision
Industries
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30
- $1,000+
- 10 - 49 employees
- Redmond, WA
Designify is a web agency based in Redmond, Wash., and founded in 2017. With no more than 50 members, they specialize in web development, web design, and SEO solutions for small and mid-market businesses in the fields of business services, consumer products, and e-commerce.
Clients
- Startline
Industries
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