Top 50 API Development Services
The Best of May 2026Looking 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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31$1,000+10 - 49 employeesKöln, GermanySoftware development company Squad-C GmbH was founded in 2024. The team provides Custom Software Development and Web Development and is based in Köln, Germany and Kowloon, Hong Kong.Read More
Industries
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32$250,000+2 - 9 employeesMünchen, GermanyInterbranche Internetagentur München GmbH is a München, Germany-based web development firm. They offer Web Development and Mobile App Development.Read More
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33UndisclosedFreelancer employeesWorms, GermanyAlexander Pfeif Einzelunternehmen is a small custom software development firm headquartered in Worms, Germany. The team offers Custom Software Development and Mobile App Development.Read More
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34Undisclosed10 - 49 employeesMering, GermanyHeadquartered in Mering, Germany, IAM Solutions is a Cybersecurity company. Founded in 2007, the team focuses on Cybersecurity and Custom Software Development.Read More
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35$10,000+2 - 9 employeesHeiligenhaus, GermanyHeljens IT Services UG (haftungsbeschränkt) is a web design agency. The Heiligenhaus, Germany-based team offers Web Design and Web Development.Read More
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36$10,000+Freelancer employeesGreven, GermanyMax Degterev is a small website development company established in 2021. Their team offers Web Development and Mobile App Development.Read More
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37$5,000+Freelancer employeesMainz, GermanyDUMA Software, a small custom software development firm, is based in Mainz, Germany. Their services include Custom Software Development and API Development.Read More
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38Undisclosed2 - 9 employeesNieder-Olm, GermanyWorking Software GmbH, a custom software development firm, focus on Custom Software Development and Web Development. They were launched in 2023.Read More
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39$1,000+Freelancer employeesBerlin, GermanyJL Software Entwicklung is a web design agency launched in 2026. In Berlin, Germany, the team focuses on Web Design and UX/UI Design.Read More
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40$1,000+Freelancer employeesHamburg, GermanyMinico AI is an AI Consulting company. The Hamburg, Germany-based company offers AI Consulting and AI Agents.Read More
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41UndisclosedFreelancer employeesHeilbronn, GermanyHeadquartered in Heilbronn, Germany, Robin Herbeck is a web development company. Founded in 2025, the team provides Web Development and IT strategy consulting.Read More
Industries
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42$1,000+Freelancer employeesWiesbaden, GermanyIn Wiesbaden, Germany, Maik Gossen is an e-commerce development firm. They offer E-Commerce Development and Web Development and were launched in 2025.Read More
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43$25,000+50 - 249 employeesHamburg, GermanySoftware Development Hub is a custom software development firm. They are in Hamburg, Germany; Kharkiv, Ukraine and Ottawa, Canada and have a midsize team. Their services include Custom Software Development, Web Development, DevOps Managed Services, API Development, and more.Read More
Clients
FieldHub Inc.Industries
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44Undisclosed50 - 249 employeesBerlin, GermanyUniform Systems, Inc. Is a CRM consulting and SI company. Based in San Francisco, California and Berlin, Germany, their team focuses on CRM consulting and SI and Custom Software Development.Read More
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45$5,000+10 - 49 employeesMünchen, GermanyRead More
Milies is a small web development firm based in Yerevan, Armenia. They provide web development, custom software development, mobile app development, and e-commerce development and were established in 2020.
Clients
CityShob APCOA Westwing XternityIndustries
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46$25,000+10 - 49 employeesFrankfurt am Main, GermanyQaiWare, an IT strategy consulting company, is based in Sofia, Bulgaria and Frankfurt am Main, Germany. The team offers IT strategy consulting and IT managed services.Read More
Industries
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47UndisclosedFreelancer employeesWarthausen, GermanyContentbär is a SEO company. They are located in Warthausen, Germany and have small team. Their services include Search Engine Optimization and Web Development.Read More
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48$1,000+50 - 249 employeesBerlin, GermanyVerzel, an IT strategy consulting company, was established in 2010. The team provides IT strategy consulting and Custom Software Development and is based in São Paulo, Brazil and Berlin, Germany.Read More
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