Top 30 JavaScript Development Companies in St. Louis
The Best of May 2025Looking for a top JavaScript developer in St. Louis?
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 St. Louis. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best St. Louis JavaScript Developers
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1$5,000+50 - 249 employeesSt. Louis, MOUPQODE 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 More
Clients
Gracenote - Entertainment ProvidersIndustries
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2$5,000+2 - 9 employeesSt. Louis, MORead More
Digital Radium is a high-end software development company founded in 2020 in St. Louis, Missouri. With about 3 employees on board, they offer web development, mobile app development, and e-commerce development to small and medium-sized businesses across several industries, the main ones being business services, manufacturing, and financial.
Clients
STL PolyjackIndustries
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3$10,000+10 - 49 employeesSt. Louis, MORead More
Web Design & Company is a PPC agency. They are located in St. Louis, Missouri and have a small team. Their services include pay per click, search engine optimization, social media marketing, web design, and more.
Industries
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4$5,000+10 - 49 employeesWebster Groves, MORead More
Founded in 2012, Beanstalk Web Solutions is a full service web development and internet marketing company based in Webster Groves, Mo. Beanstalk Web Solutions' team of 12 employees specializes in web design, mobile app development, and digital strategy.
Clients
U.S. Soybean Export CouncilIndustries
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5Undisclosed10 - 49 employeesSt. Louis, MORead More
Roundedcube is a digital agency based in St. Louis, Missouri, with a satellite office in Houston, Texas. Founded in 2002, Roundedcube's team of about 10 employees specialize in web development and web design services.
Clients
SeaWorld Parks & EntertainmentIndustries
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6$50,000+10 - 49 employeesSt. Louis, MOSpry Digital is a website development company. They focus on Web Development, Application Management & Support, Branding, Digital Strategy, and more and were established in 2010. The company is based in St. Louis, Missouri.Read More
Clients
AlticeIndustries
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7$1,000+2 - 9 employeesSt. Louis, MORead More
PC40 Interactive is a St. Louis, Missouri-based e-commerce development company. The small team focuses on e-commerce development, web development, custom software development, mobile app development, and more and was established in 2006.
Industries
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8$5,000+250 - 999 employeesSt. Louis, MOGemini Consulting & Services is a mobile application development firm. They were established in 2010 and specialize in Mobile App Development and Web Development.Read More
Clients
Weil Cornell Medicine -
9$1,000+Freelancer employeesSt. Louis, MORead More
STL Website Development was founded in 2017 and is headquartered in St. Louis, Mo. They have a team of around three employees who focus on web development and design.
Clients
FavorHealthIndustries
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10$5,000+2 - 9 employeesSt. Louis, MOVIVIDSITES is a web design agency. The St. Louis, Missouri-based agency was launched in 1999. The small team offers Web Design, Web Development, E-Commerce Development, UX/UI Design, and more.Read More
Clients
ReebokIndustries
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11$10,000+2 - 9 employeesSt. Louis, MOBrevity is a website development company. The team provides Web Development and E-Commerce Development and is located in St. Louis, Missouri.Read More
Industries
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12$5,000+2 - 9 employeesBallwin, MORead More
Data Dynamics, Inc. is an IT consulting company based in Ballwin, Mo. with more than two professionals. Since 2010, they have provided IT managed services, IT staff augmentation, and cloud consulting solutions for clients ranging from small firms to large businesses.
Clients
TKC HoldingsIndustries
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13$5,000+10 - 49 employeesSt. Louis, MOMechcubei Solutions is a St. Louis, Missouri-based mobile application development firm. Their services include Mobile App Development and UX/UI Design.Read More
Industries
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14$5,000+2 - 9 employeesFenton, MOThreeDark is a small web design company. They focus on Web Design, Web Development, UX/UI Design, and E-Commerce Development and were founded in 2022.Read More
Clients
Waterfall Glen Soap Company Rollicking Buckaroo Pepper Jam and Seasoning Blends MLK Construction Winston & Faith Baking Co.Industries
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15$10,000+2 - 9 employeesChesterfield, MORead More
Established in 2015, Studio Seagraves is a small web design company headquartered in Chesterfield, Missouri. Their services include web design, e-commerce development, and web development.
Industries
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16Undisclosed2 - 9 employeesSt. Louis, MOFlashBoombang Studios is an user experience design company. They are in St. Louis, Missouri and have small team. Their team specializes in UX/UI Design and Search Engine Optimization.Read More
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17$1,000+10 - 49 employeesBelleville, ILBusiness Consulting company Konect360 was founded in 2016. The team focuses on Business Consulting and Marketing Strategy.Read More
Industries
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18$1,000+2 - 9 employeesCreve Coeur, MOFounded in 2023, Algoflow is a small Creve Coeur, Missouri-based web design agency and web development company. Their team specializes in Web Design and Web Development.Read More
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19$1,000+10 - 49 employeesChesterfield, MOHinj Social is a branding company launched in 2018. The small team specializes in Branding and Social Media Marketing.Read More
Industries
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20$1,000+2 - 9 employeesRichmond Heights, MOAO Creatives is a SEO services firm. The Richmond Heights, Missouri-based firm provides Search Engine Optimization and Social Media Marketing.Read More
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21$1,000+2 - 9 employeesArnold, MOSTL CodeScape is a website development firm. They are based in Arnold, Missouri. Their team provides Web Development and Web Design.Read More
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22$5,000+2 - 9 employeesSt. Louis, MOSoftware development company DEKAMCO was founded in 2019. The firm offers Custom Software Development and Mobile App Development, and is small.Read More
Industries
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23$1,000+2 - 9 employeesLake Saint Louis, MOEstablished in 2021, Gardiner Web Development, LLC is a web development firm. The team provides Web Development and E-Commerce Development and is in Lake Saint Louis, Missouri.Read More
Industries
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24Undisclosed2 - 9 employeesTown and Country, MOBecurity is a mobile application development company. The Town and Country, Missouri-based firm focuses on Mobile App Development and Web Development.Read More
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25$1,000+2 - 9 employeesEllisville, MONever Gravity Web Design, a SEO agency, specializes in Search Engine Optimization and Web Design. The firm is located in Ellisville, Missouri.Read More
Industries
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26$1,000+2 - 9 employeesFarmington, MOElement 99 Web Services is a web design agency. Founded in 2021, their team specializes in Web Design and Web Development.Read More
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27Undisclosed10 - 49 employeesSt. Louis, MOGiant Hat is an e-commerce development company. They were established in 1905, and their services include E-Commerce Development and Web Development.Read More
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