Top 40 REST Services in California
The Best of October 2026Looking for a top REST API service in California?
With their deep understanding of REST architecture, API security, and industry best practices, REST API services help businesses design, build, and deploy REST APIs that meet their specific business requirements. By collaborating with REST API service providers, companies can enhance their application's functionality, scalability, and performance, ultimately driving business growth and success.
To assist you in your search for a partner, we’ve compiled this list of the top REST API companies in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best California REST API Providers
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31$1,000+50 - 249 employeesOjai, CABased in Ahmedabad, India and Ojai, California, MagnusMinds IT Solution LLP is a big data company. The midsize agency was founded in 2009. Their services include BI & big data consulting & SI, Web Development, Enterprise App Modernization, API Development, and more.Read More
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32Undisclosed10 - 49 employeesSan Diego, CACreatable is a social media marketing agency. Located in San Diego, California, the company focuses on Social Media Marketing and Video Marketing.Read More
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33$5,000+2 - 9 employeesSacramento, CACoreBackend is a software development company established in 2025. Headquartered in Sacramento, California, the team focuses on Custom Software Development and API Development.Read More
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34Undisclosed50 - 249 employeesSan Jose, CAEmerge Soft Sp. Z o.o. Is a software development company. The team offers Custom Software Development and cloud consulting & SI and is headquartered in Warszawa, Poland and San Jose, California.Read More
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35Undisclosed10 - 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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36$1,000+2 - 9 employeesAnaheim, CALaunch Up Labs, a software development firm, was founded in 2024. The agency offers Custom Software Development and Web Development.Read More
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37Undisclosed50 - 249 employeesPalo Alto, CALaunched in 2013, Data Theorem, Inc. Is an app development firm. Their team focuses on Mobile App Development and IT strategy consulting.Read More
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38$10,000+10 - 49 employeesSan Francisco, CATekxai is a custom software development firm founded in 2020. Located in San Francisco, California; Milton, Canada and Lahore, Pakistan, their small team offers Custom Software Development, Artificial Intelligence, IT strategy consulting, Enterprise App Modernization, and more.Read More
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39$1,000+10 - 49 employeesGlendale, CAEstablished in 2024, Zareko is a custom software development firm. The small team specializes in Custom Software Development and Web Development.Read More
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40$50,000+50 - 249 employeesLong Beach, CALaunched in 2019, bycoders_ is a Low/No Code Development company. They are in Centro, Brazil; São Paulo, Brazil and Long Beach, California and have a midsize team. The firm focuses on Low/No Code Development, API Development, Custom Software Development, Application Management & Support, and more.Read More
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banking E-commerce health LogisticsIndustries
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41$50,000+50 - 249 employeesOakland, CACustom software development company Blue Trail Software was founded in 2013. Headquartered in Oakland, California; Tepatitlán de Morelos, Mexico; València, Spain and Resistencia, Argentina, their midsize team specializes in Custom Software Development, Building Security Services, Application Testing, Mobile App Development, and more.Read More
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42$10,000+50 - 249 employeesUnion City, CACloudpacer Inc, a custom software development company, specializes in Custom Software Development and Web Development. The company is in Union City, California and Lahore, Pakistan.Read More
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43$10,000+10 - 49 employeesHuntington Beach, CAAlokin is a software development company founded in 2011. Their services include Custom Software Development and Web Development.Read More
Industries
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