Top 100 API Development Services
The Best of April 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$10,000+50 - 249 employeesLos Angeles, CADigiNeat Smart Technologies is a web design company. Founded in 2024, the midsize company is based in Los Angeles, California and Yerevan, Armenia. Their services include Web Design, UX/UI Design, Web Development, Mobile App Development, and more.Read More
Industries
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32$10,000+10 - 49 employeesRedlands, CAUSDevBrokers is a Redlands, California-based website development firm. They specialize in Web Development and Mobile App Development.Read More
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33Undisclosed50 - 249 employeesPalo Alto, CAFiorano is a Business Consulting and API Development company. They offer Business Consulting and API Development and were established in 1995.Read More
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34$1,000+10 - 49 employeesDiamond Bar, CAFounded in 2017, InfoLake LLC, a small custom software development company, is in Diamond Bar, California. Their team specializes in Custom Software Development and Web Development.Read More
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35$5,000+10 - 49 employeesSanta Monica, CASofrix is a website development firm established in 2021. Their team provides Web Development and Mobile App Development.Read More
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36$50,000+10 - 49 employeesLos Angeles, CAMetastability Inc is a custom software development company. The team focuses on Custom Software Development and Mobile App Development, and the firm is in Los Angeles, California.Read More
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37$5,000+2 - 9 employeesSan Diego, CAApplication development firm devAtelier offers Mobile App Development and Web Development. They are located in San Diego, California.Read More
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38$10,000+2 - 9 employeesLa Habra, CAUniversal Informatics LLC, a web development company, was founded in 2024. They are based in La Habra, California and have a small team. Their services include web development, mobile app development, api development, microservices architecture services, and more.Read More
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39Undisclosed1,000 - 9,999 employeesDiamond Bar, CALiferay is an Application Testing company established in 2004. The large team focuses on Application Testing and API Development.Read More
Industries
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40Undisclosed10 - 49 employeesMenlo Park, CAWireMock, a small API Development company, is in Menlo Park, California. The team provides API Development and cloud consulting & SI.Read More
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41Undisclosed10 - 49 employeesIrvine, CAStratus Meridian is a cloud consulting & SI company. Their small team is in Irvine, California. Their team specializes in cloud consulting & SI and API Development.Read More
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42$1,000+10 - 49 employeesFremont, CAFounded in 2015, OneGreenDiary is a small ERP consulting and SI company. Their team focuses on ERP consulting and SI and Web Development.Read More
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43Undisclosed2 - 9 employeesCarlsbad, CALaunched in 2020, QADeputy is an Application Testing company. The team provides Application Testing and API Development.Read More
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44Undisclosed10 - 49 employeesSan Diego, CAEstablished in 2017, JopeConnect is a small big data company. Their services include BI & big data consulting & SI and Custom Software Development.Read More
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45Undisclosed50 - 249 employeesRedwood City, CASplit Software, Inc. Is an Application Testing company. They offer Application Testing and Custom Software Development and were launched in 2015.Read More
Industries
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46Undisclosed50 - 249 employeesSan Diego, CAMiva, Inc. Is a midsize SEO services firm based in Tampa, Florida and San Diego, California. Their services include Search Engine Optimization and Web Design.Read More
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47Undisclosed50 - 249 employeesSan Francisco, CAClarifai, Inc., an AI firm, is based in San Francisco, California. Their services include Artificial Intelligence and Content Moderation Services.Read More
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48Undisclosed2 - 9 employeesCarlsbad, CASkyblue is a cloud consulting & SI company. Established in 2010, the company specializes in cloud consulting & SI and CRM consulting and SI.Read More
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49Undisclosed2 - 9 employeesGlendale, CAEstablished in 2010, toKernel is a web design agency. Their services include Web Design and Custom Software Development.Read More
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50Undisclosed2 - 9 employeesSan Juan Capistrano, CALocated in San Juan Capistrano, California, SwiftLead is a small web design company. Their services include Web Design and cloud consulting & SI.Read More
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51Undisclosed10 - 49 employeesSan Jose, CAHiTech ERP Solutions Inc is a cloud consulting & SI company. Based in San Jose, California, the team provides cloud consulting & SI and ERP consulting and SI.Read More
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52Undisclosed10 - 49 employeesFresno, CAMertech Data Systems, Inc. Is a small custom software development firm based in Pembroke Pines, Florida and Fresno, California. The team offers Custom Software Development and cloud consulting & SI.Read More
Industries
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53Undisclosed10 - 49 employeesSan Francisco, CAPostHog, Inc. Is a Market Research company. Based in San Francisco, California, their team focuses on Market Research and BI & big data consulting & SI.Read More
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54Undisclosed10 - 49 employeesSan Francisco, CA729 Solutions is a branding company. Based in San Francisco, California, the firm was established in 2003. Their services include Branding and IT managed services.Read More
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55Undisclosed10 - 49 employeesPasadena, CAWeb design agency Upgrade Consulting focuses on Web Design and UX/UI Design. They were launched in 2023.Read More
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56$1,000+10 - 49 employeesLos Angeles, CAIdows is an e-commerce development firm. Launched in 2017, their team offers E-Commerce Development and Mobile App Development.Read More
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57Undisclosed250 - 999 employeesCulver City, CACustom software development firm Test Pro is located in Culver City, California. The team specializes in Custom Software Development and Application Testing.Read More
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58Undisclosed250 - 999 employeesIrvine, CALaunched in 2015, Arctiq is a midsize IT strategy consulting company. Their services include IT strategy consulting and unified communications consulting & SI.Read More
Industries
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59$50,000+50 - 249 employeesLong Beach, CAEstablished in 2019, bycoders_ is a Low/No Code Development company. Their midsize team is headquartered in Cascais, Portugal; São Paulo, Brazil and Long Beach, California. Their services include Low/No Code Development, IT staff augmentation, Custom Software Development, Web Development, and more.Read More
Clients
banking E-commerce health LogisticsIndustries
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60UndisclosedFreelancer employeesRohnert Park, CACzezar Design & Development is an UX agency in Rohnert Park, California. They specialize in UX/UI Design and Corporate Photography.Read More
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