Top 20 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 employeesChicago, ILHristov Development, an UX agency, was founded in 2013. Their small team is headquartered in Chicago, Illinois and Aguascalientes, Mexico. The company offers UX/UI Design, cloud consulting & SI, IT managed services, IT staff augmentation, and more.Read More
Clients
CylindoIndustries
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2$25,000+10 - 49 employeesOakbrook Terrace, ILLocated in Oakbrook Terrace, Illinois and Oakbrook Terrace, Illinois, LOGICON, LLC is a small Business Consulting company. They provide Business Consulting, Robotics Process Automation, API Development, BI & big data consulting & SI, and more and were founded in 2015.Read More
Industries
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3$25,000+10 - 49 employeesChicago, ILTwinCore is a cloud consulting & SI company based in Chicago, Illinois. The small firm was founded in 2011. Their services include cloud consulting & SI, CRM consulting and SI, Custom Software Development, Web Development, and more.Read More
Clients
n-treeIndustries
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4$1,000+50 - 249 employeesDeerfield, ILKleinschmidt Inc. Is a Deerfield, Illinois-based e-commerce development company. The firm focuses on E-Commerce Development, IT managed services, API Development, and Document Digitization & Management and is midsize.The firm was established in 1986.Read More
Industries
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5$25,000+2 - 9 employeesSt. Charles, ILLocated in St. Charles, Illinois, Wayne Point, LLC is a small Digital Strategy and website development company. Their services include Digital Strategy and Web Development.Read More
Industries
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6$5,000+50 - 249 employeesLibertyville, ILBitovi, an Enterprise App Modernization company, is based in Libertyville, Illinois. They specialize in Enterprise App Modernization and Custom Software Development and were launched in 2007.Read More
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7$5,000+10 - 49 employeesChicago, ILUFlow Decision Engine, a graphic design agency, offer Graphic Design and cloud consulting & SI. They were founded in 2020.Read More
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8Undisclosed10 - 49 employeesChicago, ILScalesology is a big data company. They are based in Chicago, Illinois and Denver, Colorado, and their services include BI & big data consulting & SI and Custom Software Development.Read More
Industries
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9$10,000+10 - 49 employeesSouth Barrington, ILAptlyLabs Inc is a small software development company. They offer Custom Software Development and Web Development and were launched in 2018.Read More
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10$5,000+2 - 9 employeesCherry Valley, ILSW Development Services is a web development firm based in Cherry Valley, Illinois. Launched in 2014, the small team focuses on web development, mobile app development, api development, and search engine optimization.Read More
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11$5,000+2 - 9 employeesPalatine, ILEstablished in 2019, TSYFRA is a SEO agency. Their team focuses on Search Engine Optimization and Web Development.Read More
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12$25,000+10 - 49 employeesChicago, ILPixelum, a Content Marketing company, was launched in 2024. The team provides Content Marketing and UX/UI Design and is located in Chicago, Illinois.Read More
Industries
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13$5,000+2 - 9 employeesChicago, ILFounded in 2008, Chicago Web is an e-commerce development company. The company focuses on E-Commerce Development and Web Development, and is small.Read More
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14$5,000+50 - 249 employeesChicago, ILIn New Delhi, India; Oakville, Canada and Chicago, Illinois, StudioKrew is an application development company. They specialize in Mobile App Development, Custom Software Development, AR/VR development, UX/UI Design, and more and were established in 2013.Read More
Industries
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15$1,000+10 - 49 employeesSkokie, ILWebkrafterz is a custom software development company launched in 2014. The company provides Custom Software Development and Web Development, and is small.Read More
Industries
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16Undisclosed2 - 9 employeesNaperville, ILLocated in Naperville, Illinois and Budapest, Hungary, Hawkdive Media is a small API Development company. Their services include API Development and Web Development.Read More
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17$1,000+2 - 9 employeesChicago, ILAdminix is a software development firm headquartered in Chicago, Illinois and Vyshhorod, Ukraine. Founded in 2022, the team offers Custom Software Development and API Development.Read More
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18$5,000+10 - 49 employeesDowners Grove, ILProfusion Systems is a Downers Grove, Illinois-based software development company. The small company was established in 2012. Their team specializes in Custom Software Development, Mobile App Development, cloud consulting & SI, E-Commerce Development, and more.Read More
Clients
AramarkIndustries
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19Undisclosed250 - 999 employeesChicago, ILLaunched in 2001, Basis Technologies is an Advertising company. The team focuses on Advertising and Direct Marketing and is headquartered in Chicago, Illinois.Read More
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20Undisclosed50 - 249 employeesSt. Charles, ILIyka Enterprises Inc., a midsize API Development company, is headquartered in St. Charles, Illinois. The team offers API Development.Read More
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21Undisclosed2 - 9 employeesWestern Springs, ILEngineered IT, Inc. Is an API Development company. Their team is located in Western Springs, Illinois. The firm specializes in API Development.Read More
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22Undisclosed2 - 9 employeesChicago, IL606 Digital is an API Development company. The agency is in Chicago, Illinois. Their team focuses on API Development.Read More
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23Undisclosed50 - 249 employeesPark Ridge, ILSales Outsourcing company Policy Claim Management International (PCMI) is located in Park Ridge, Illinois. They provide Sales Outsourcing and Market Research.Read More
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24$25,000+10 - 49 employeesNaperville, ILRead More
Established in 2017, Meta App Designs is an app development firm. Located in Concord, California, their small team offers mobile app development, blockchain, AR/VR development, IoT development, and more.
Industries
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25Undisclosed2 - 9 employeesNaperville, ILNaper Solutions, Inc. Is an Email Marketing company established in 1997. In Naperville, Illinois, the team provides Email Marketing and Search Engine Optimization.Read More
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