Top 40 API Development Services
The Best of December 2025Looking for a top API developer?
With their in-depth knowledge of API technologies, programming languages, and industry best practices, API developers help businesses design, build, and deploy custom APIs that meet their specific business requirements. By collaborating with API development professionals, businesses can unlock new opportunities for data sharing, automation, and integration.
That's why we've created this list of the best API developers for you to review. Read through company descriptions, former clients, and notable projects to find the best fit for your business.
List of the Best API Development Companies
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1$5,000+10 - 49 employeesBlue Bell, PABased in Blue Bell, Pennsylvania, Hammer Dev is a big data company. The team offers BI & big data consulting & SI and Custom Software Development.Read More
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2$1,000+2 - 9 employeesYardley, PAArtol Web Studio is a SEO services firm established in 2024. The agency offers Search Engine Optimization, Custom Software Development, Web Development, API Development, and more and has a small team. The agency is located in Yardley, Pennsylvania.Read More
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3$1,000+10 - 49 employeesNew Castle, DECRM consulting and SI company GM Sunshine was founded in 2016. Their small team is in New Castle, Delaware. GM Sunshine focuses on CRM consulting and SI, Custom Software Development, Application Management & Support, API Development, and more.Read More
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4$10,000+2 - 9 employeesWilmington, DEDeSight Studio Inc. Is a Performance Marketing company based in Wilmington, Delaware and New York, New York. The agency specializes in Performance Marketing, E-Commerce Development, Ecommerce Marketing, Artificial Intelligence, and more and has a small team.The agency was launched in 2025.Read More
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5Undisclosed10 - 49 employeesPhiladelphia, PADigital Marketing Group LLC is a small Content Marketing company founded in 2013. Their team specializes in Content Marketing and Search Engine Optimization.Read More
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6$10,000+10 - 49 employeesNewark, DEIn Newark, Delaware, FlowKit from Spontlr Inc. Is a web development firm. The team focuses on Web Development and Mobile App Development.Read More
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7Undisclosed50 - 249 employeesClaymont, DEIcanio Technologies Inc. Is a web development firm. Their midsize team is headquartered in Claymont, Delaware. Their services include Web Development and Mobile App Development.Read More
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8Undisclosed2 - 9 employeesFort Washington, PAData analytics company AccuCentrix, Inc specializes in BI & big data consulting & SI and Custom Software Development. They are headquartered in Fort Washington, Pennsylvania.Read More
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9$10,000+250 - 999 employeesToms River, NJEstablished in 2021, Frame X Lab is a mobile app development company. Located in Toms River, New Jersey, their midsize team provides mobile app development, wearable app development, and IoT development.Read More
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10Undisclosed2 - 9 employeesWilmington, DEHeadquartered in Wilmington, Delaware, JSight is a small API Development company. The team offers API Development.Read More
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11Undisclosed2 - 9 employeesWilmington, DEUBITQUITY, LLC is a Blockchain Marketing and API Development company. Based in Wilmington, Delaware, the team offers Blockchain Marketing and API Development.Read More
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12$10,000+50 - 249 employeesNewark, DEIntrinsic Tech is a software development firm. In Newark, Delaware, the agency offers Custom Software Development and Artificial Intelligence.Read More
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13Undisclosed2 - 9 employeesPhiladelphia, PACloudMine is a business intelligence company. Their small team of employees is based in Philadelphia, Pennsylvania. Their team provides BI & big data consulting & SI and Web Development.Read More
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14Undisclosed2 - 9 employeesBryn Mawr, PAUtulla is a small big data company in Bryn Mawr, Pennsylvania. The team offers BI & big data consulting & SI and Custom Software Development.Read More
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15$5,000+50 - 249 employeesEdison, NJI Verve Inc, a custom software development firm, was launched in 2008. Their midsize team is in Edison, New Jersey. The firm provides Custom Software Development, Artificial Intelligence, Enterprise App Modernization, Mobile App Development, and more.Read More
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16Undisclosed250 - 999 employeesWilmington, DEKeylent Inc, a business intelligence company, was founded in 2010. The agency offers BI & big data consulting & SI and CRM consulting and SI, and is midsize.Read More
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17Undisclosed2 - 9 employeesDoylestown, PANoetyx is a software development company. Their small team of employees is located in Doylestown, Pennsylvania. Their team focuses on Custom Software Development and Robotics Process Automation.Read More
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18$1,000+Freelancer employeesFlemington, NJRight Angle Tech is a web design agency. Their small team of employees is based in Flemington, New Jersey. Their team provides Web Design and Mobile App Development.Read More
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19Undisclosed2 - 9 employeesWilmington, DEChainhive is a custom software development firm. They are in Wilmington, Delaware and have small team. Their services include Custom Software Development and Web Development.Read More
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20Undisclosed2 - 9 employeesWilmington, DEWeb Lights is an ERP consulting and SI company. Founded in 2010, the company provides ERP consulting and SI and Custom Software Development.Read More
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21Undisclosed2 - 9 employeesNewark, DEEstablished in 2002, Uptown4, Inc. Is a web development company. Their services include Web Development and Mobile App Development.Read More
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22Undisclosed10 - 49 employeesMarlboro Township, NJCyber Pioneers, Inc is an AI development company. The company is headquartered in Marlboro Township, New Jersey. Their team specializes in Artificial Intelligence and Web Development.Read More
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23UndisclosedFreelancer employeesWilmington, DEOrganic Mindset Agency Inc. Is a Wilmington, Delaware-based social media marketing company. Their services include Social Media Marketing and Conversion Optimization.Read More
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24Undisclosed50 - 249 employeesDover, DESuperViz is a web development company and API Development company launched in 2018. The midsize team specializes in Web Development and API Development.Read More
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25$5,000+50 - 249 employeesPrinceton, NJRead More
Established in 2016, Aroopa, Inc is a web design agency. The small team provides web design, branding, and advertising. The agency is in Princeton, New Jersey.
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26Undisclosed10 - 49 employeesNewark, DESocialCTR Solutions is a small web development company founded in 2014. Their team provides Web Development and Social Media Marketing.Read More
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27UndisclosedFreelancer employeesPrinceton, NJAutomation Testing Services, a small Application Testing company, is based in Toronto, Canada and Princeton, New Jersey. The team focuses on Application Testing and Artificial Intelligence.Read More
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28Undisclosed2 - 9 employeesNewark, DEEstablished in 2017, Photon CMS, Inc is a web development company. The team offers Web Development and Mobile App Development.Read More
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29Undisclosed50 - 249 employeesEdison, NJXHTMLCHOP is a midsize Email Marketing company founded in 2007. Their team focuses on Email Marketing and Custom Software Development.Read More
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30Undisclosed2 - 9 employeesMiddletown, DEEstablished in 2019, LaunchX AI Technologies is a small artificial intelligence firm. Their team focuses on Artificial Intelligence and Mobile App Development.Read More
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