Leading API Development Companies in United States

Searching for the right API Development company in the United States? When APIs link your products, partners, and data, they become mission-critical to reliability, security, and growth. With so many vendors, how do you spot the best fit for your stack, timeline, and budget? You need data-driven research, not guesswork.

ITProfiles connects you with the right United States-based API Development agency using the ITP Score, our data scan across the web that finds 113 companies, delivering an unbiased list, neutral expert analysis, and pros and cons for every provider we cover. Ready to choose with confidence?



Recent white-glove matches:

A Canadian logistics company connected with 3 agencies for a custom fleet management platform
A US nonprofit organization connected with 2 agencies for a donor management platform
A California healthcare provider matched with 3 agencies for a patient portal modernization project
A Netherlands-based startup matched with 3 agencies to develop an AI-powered document processing application
An Australian eCommerce brand matched with 5 agencies to migrate their store to Shopify Plus
A German manufacturing company connected with 2 agencies for an AI-powered predictive maintenance solution
A UAE real estate firm matched with 2 agencies to develop a property management and CRM system
A UK fintech startup connected with 4 agencies to build a secure customer onboarding platform
A Denver-based SMB connected with 3 agencies for their automation project
A Swedish startup matched with 2 agencies that required a HIPAA-compliant tool for their app

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Expert-Recommended API Development Companies in United States

148 Companies Showing 101 - 148 Updated on September 11, 2026 Editor:
    Elena Paraschiv-Pop
Every agency on ITProfiles is evaluated for expertise and client feedback to help you make informed decisions. See how we rank companies
  • Ntegral Inc.

    Ntegral Inc.

    Atlanta, United States
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    Ntegral Inc. is a trailblazing tech company based in Atlanta, GA, dedicated to revolutionizing the digital landscape. At Ntegral, we pride ourselves on delivering innovative solutions that propel businesses forward in the ever-evolving tech realm.
    API Development, Software Development, Cloud Computing, Digital Strategy
    • 21-50 Members
  • TwinEngines, Inc.

    TwinEngines, Inc.

    Atlanta, United States
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    TwinEngines, Inc. is a trailblazing tech company based in Atlanta, GA, dedicated to driving innovation and excellence in the digital realm.
    API Development, Artificial Intelligence, Cloud Computing, DevOps
    • 21-50 Members
  • TalenTech Global Solutions

    TalenTech Global Solutions

    Alpharetta, United States
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    TalenTech Global Solutions is your trusted partner in driving digital transformation and innovation. We are a leading IT services company based in Alpharetta, GA, dedicated to empowering businesses with cutting-edge technology solutions tailored to their unique needs.
    API Development, Mobile App Development, Cloud Computing, Artificial Intelligence
    • 21-50 Members
  • Janeiro Digital

    Janeiro Digital

    Boston, United States
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    At Janeiro Digital, based in the vibrant city of Boston, MA, we are driven by innovation and a passion for creating exceptional digital experiences.
    API Development, Digital Strategy, User Experience, DevOps
    • 21-50 Members
  • 5.15 Technologies

    5.15 Technologies

    Lancaster, United States
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    5.15 Technologies is a cutting-edge tech company based in Lancaster, PA, dedicated to empowering businesses with innovative solutions tailored to their needs. At 5.15 Technologies, we pride ourselves on delivering top-notch services that drive success and growth for our clients.
    API Development, Digital Strategy, Artificial Intelligence, Cloud Computing
    • 21-50 Members
  • Four Bends Pvt Ltd

    Four Bends Pvt Ltd

    Piscataway, United States
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    Four Bends Pvt Ltd is a leading technology company based in Piscataway, NJ, specializing in a wide range of services to cater to the diverse needs of businesses.
    API Development, Mobile App Development, DevOps, Cloud Computing
    • 21-50 Members
  • Silicon Spirit Consulting Group, Inc.

    Silicon Spirit Consulting Group, Inc.

    Reston, United States
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    Silicon Spirit Consulting Group, Inc. is a leading technology consulting firm based in Reston, VA, specializing in a wide range of services to help businesses thrive in the digital age.
    API Development, Artificial Intelligence, Mobile App Development, Software Development
    • 2-10 Members
  • AIN, LLC

    AIN, LLC

    Hagerstown, United States
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    AIN, LLC is a technology company based in Hagerstown, MD, specializing in a wide range of services to meet the evolving needs of businesses in today's digital landscape.
    API Development, Product Engineering, Software Development, Artificial Intelligence
    • 2-10 Members
  • LaunchX AI Technologies

    LaunchX AI Technologies

    Middletown, United States
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    LaunchX AI Technologies is a cutting-edge technology company based in Middletown, DE, dedicated to providing innovative solutions in the field of artificial intelligence and software development.
    API Development, Artificial Intelligence, Mobile App Development, DevOps
    • 2-10 Members
  • Invictus Gurus

    Invictus Gurus

    Plano, United States
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    Invictus Gurus is a tech powerhouse based in Plano, TX, dedicated to revolutionizing the digital landscape. At Invictus Gurus, we pride ourselves on being at the forefront of cutting-edge technology and innovation.
    API Development, Mobile App Development, Software Development, Artificial Intelligence
    • 2-10 Members
  • Bizteon Software

    Bizteon Software

    Houston, United States
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    Bizteon Software, located in Houston, TX, is a leading technology company dedicated to providing innovative solutions tailored to meet the evolving needs of businesses.
    API Development, Software Development, Digital Strategy, Artificial Intelligence
    • 2-10 Members
  • Incline Digital LLC

    Incline Digital LLC

    Pleasant Hill, United States
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    Based in the vibrant city of Pleasant Hill, OH, Incline Digital LLC is a cutting-edge technology company at the forefront of innovation. Our diverse range of services caters to businesses looking to thrive in the digital landscape.
    API Development, Mobile App Development, Software Development, eCommerce Development
    • Freelancer
  • Maveric Systems Limited

    Maveric Systems Limited

    Princeton, United States
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    Maveric Systems Limited, located in Princeton, NJ, is a leading technology company specializing in a range of innovative services tailored to meet the evolving needs of businesses in today's digital landscape.
    API Development, Mobile App Development, DevOps, Cloud Computing
    • 1001-2000 Members
  • Opus Technologies

    Opus Technologies

    Alpharetta, United States
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    Opus Technologies is a leading technology company based in Alpharetta, GA, dedicated to providing innovative solutions to businesses of all sizes. Our comprehensive range of services is designed to help organizations thrive in the ever-evolving digital landscape.
    API Development, Digital Strategy, DevOps, Managed Services
    • 201-500 Members
  • Page Authority

    Page Authority

    Worcester, United States
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    Page Authority, based in Worcester, MA, is a dynamic digital agency dedicated to helping businesses thrive in the online realm. At Page Authority, we understand the importance of a strong online presence in today's competitive landscape.
    API Development, SEO, Social Media Marketing, PPC
    • 21-50 Members
  • EnoviQ Technologies

    EnoviQ Technologies

    Rehoboth Beach, United States
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    EnoviQ Technologies is a cutting-edge tech company based in the serene town of Rehoboth Beach, DE. At EnoviQ, we pride ourselves on offering innovative solutions tailored to meet the unique needs of our clients.
    API Development, DevOps, Cloud Computing
    • 51-100 Members
  • Progress

    Progress

    Burlington, United States
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    Progress, based in Burlington, MA, is a trailblazing tech company dedicated to driving innovation and success for our clients. At Progress, we pride ourselves on our ability to deliver cutting-edge solutions tailored to meet the unique needs of each business buyer we serve.
    API Development, Digital Strategy, Mobile App Development, eCommerce Development
    • 1001-2000 Members
  • Lumar

    Lumar

    New York, United States
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    Lumar is a dynamic tech company based in the bustling city of New York City, NY. Our innovative approach to technology sets us apart in the industry, offering a comprehensive range of services to meet the diverse needs of our clients.
    API Development, Web Development, SEO, Digital Strategy
    • 51-100 Members
  • Three-X-Square

    Three-X-Square

    Red Bank, United States
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    Three-X-Square is a dynamic technology company based in Red Bank, NJ, specializing in a wide range of innovative services to help businesses thrive in the digital world.
    API Development, Mobile App Development, DevOps, Cloud Computing
    • 2-10 Members
  • Bit Solution Group LLC

    Bit Solution Group LLC

    St. Petersburg, United States
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    Bit Solution Group LLC, located in St. Petersburg, FL, is a leading technology company offering a wide range of services to meet the digital needs of businesses.
    API Development, DevOps, Cloud Computing, Web Development
    • 21-50 Members
  • ZAPTEST

    ZAPTEST

    Atlanta, United States
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    ZAPTEST is a leading technology company based in Atlanta, GA, specializing in a wide range of innovative services to meet the evolving needs of businesses in today's digital landscape.
    API Development, Mobile App Development, Artificial Intelligence, DevOps
    • 21-50 Members
  • Vulk Coop

    Vulk Coop

    Austin, United States
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    Vulk Coop is an innovative technology company based in Austin, TX, specializing in a wide range of services to meet the diverse needs of businesses in today's digital landscape.
    API Development, Software Development, User Experience, DevOps
    • 21-50 Members
  • Sweden Street

    Sweden Street

    Caribou, United States
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    Sweden Street is a visionary tech company nestled in the heart of Caribou, ME. At Sweden Street, we pride ourselves on delivering innovative solutions tailored to meet the unique needs of our clients.
    API Development, Web Development, User Experience, DevOps
    • 2-10 Members
  • Updraft

    Updraft

    Denver, United States
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    Welcome to Updraft, based in the vibrant city of Denver, CO. At Updraft, we pride ourselves on being a leading provider of innovative tech solutions tailored to meet your business needs.
    API Development, Mobile App Development, DevOps, Cloud Computing
    • 2-10 Members
  • Neosys Consulting

    Neosys Consulting

    Kennesaw, United States
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    Neosys Consulting is your trusted partner in the tech realm, located in the vibrant city of Kennesaw, GA. We pride ourselves on our innovative solutions and unwavering commitment to excellence.
    API Development, Software Development, DevOps, Cloud Computing
    • 2-10 Members
  • ProductStack

    ProductStack

    Charlotte, United States
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    ProductStack is a leading tech company based in Charlotte, NC. At ProductStack, we pride ourselves on delivering top-notch solutions tailored to meet the unique needs of our clients.
    API Development, Software Development, DevOps, Product Design
    • 2-10 Members
  • Mantiki Solutions, LLC

    Mantiki Solutions, LLC

    Lewisville, United States
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    Mantiki Solutions, LLC is a cutting-edge technology company based in Lewisville, TX, at the heart of innovation and progress. Specializing in a wide range of services, we cater to businesses looking to thrive in the digital landscape.
    API Development, Web Development, Digital Strategy, DevOps
    • 2-10 Members
  • Axon Consulting

    Axon Consulting

    Houston, United States
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    Axon Consulting is a leading IT services provider based in Houston, TX, offering a wide range of cutting-edge solutions to meet the evolving technological needs of businesses.
    API Development, Cloud Computing, Product Engineering, DevOps
    • 2-10 Members
  • DevOps Global Solutions, LLC

    DevOps Global Solutions, LLC

    Phoenix, United States
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    DevOps Global Solutions, LLC is your trusted partner in the ever-evolving digital landscape. Located in the vibrant city of Phoenix, AZ, we pride ourselves on delivering cutting-edge IT Services tailored to meet your unique business needs.
    API Development, DevOps, Software Development, Web Design
    • Freelancer
  • RICEFW Technologies Inc

    RICEFW Technologies Inc

    United States
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    RICEFW Technologies Inc. is a leading technology consulting firm and solutions provider with a strong presence in IT Staff Augmentation and consulting services since 2010.
    API Development, Software Development, DevOps, Cloud Computing
    • 51-100 Members
  • Brainsquare

    Brainsquare

    Dallas, United States
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    Located in the bustling city of Dallas, TX, Brainsquare is a leading technology company that specializes in a wide range of services to meet the ever-evolving needs of businesses in today's digital landscape.
    API Development, Software Development, Digital Strategy, Cloud Computing
    • 51-100 Members
  • Valore Partners LLC

    Valore Partners LLC

    Phoenix, United States
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    Valore Partners LLC, based in the vibrant city of Phoenix, AZ, is a leading technology firm specializing in a wide range of services tailored to meet the evolving needs of businesses in today's digital landscape.
    API Development, Software Development, Product Engineering, Cloud Computing
    • 51-100 Members
  • Marici Technology Solutions

    Marici Technology Solutions

    Seattle, United States
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    Marici Technology Solutions, located in Seattle, WA, is a leading technology company offering a wide range of services to meet the diverse needs of businesses in today's digital landscape.
    API Development, Software Development, eCommerce Development, DevOps
    • 21-50 Members
  • Ortus Solutions, Corp.

    Ortus Solutions, Corp.

    Tomball, United States
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    Ortus Solutions, Corp. is a leading technology company based in Tomball, TX, dedicated to providing innovative solutions that drive business growth and success.
    API Development, Web Development, Mobile App Development, User Experience
    • 21-50 Members
  • Data108

    Data108

    Hollywood, United States
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    Data108 is a leading technology company based in Hollywood, FL, specializing in a wide range of development and software services to help businesses thrive in the digital age.
    API Development, Software Development, Web Development, Mobile App Development
    • 2-10 Members
  • Proga Digital

    Proga Digital

    Thomasville, United States
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    Proga Digital, located in Thomasville, GA, is a leading technology company offering a wide range of services to help businesses thrive in the digital world. Our team of experts specializes in various areas to provide tailored solutions to meet your specific needs.
    API Development, Software Development, Cloud Computing, Web Design
    • 2-10 Members
  • RAIN Software Technologies, LLC

    RAIN Software Technologies, LLC

    Tualatin, United States
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    Rain Software Technologies, LLC is a cutting-edge tech company based in Tualatin, OR. We pride ourselves on delivering innovative solutions tailored to meet the unique needs of our clients.
    API Development, Software Development, DevOps
    • 2-10 Members
  • Catapult.io

    Catapult.io

    Charleston, United States
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    Catapult.io, based in Charleston, SC, is an innovative tech company dedicated to propelling businesses to new heights. With a passion for cutting-edge solutions, we pride ourselves on delivering top-notch services tailored to meet the unique needs of our clients.At Catapult.
    API Development, Mobile App Development, DevOps, Cloud Computing
    • 2-10 Members
  • Bitwise Digital

    Bitwise Digital

    Houston, United States
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    Bitwise Digital is a leading tech company based in Houston, TX, dedicated to empowering businesses through innovative digital solutions. At Bitwise Digital, we believe in the transformative power of technology to drive growth and success for our clients.
    API Development, Mobile App Development, Software Development, eCommerce Development
    • 2-10 Members
  • Orientier

    Orientier

    Lynn, United States
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    Located in Lynn, MA, Orientier is a dynamic company that offers a wide range of cutting-edge services to help businesses thrive in the digital landscape.
    API Development, SEO, Mobile App Development, Digital Strategy
    • Freelancer
  • AuroPro Soft Systems

    AuroPro Soft Systems

    Plainsboro Township, United States
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    AuroPro Soft Systems, located in Plainsboro Township, NJ, is a cutting-edge technology company specializing in a wide range of services to meet the diverse needs of businesses in today's digital landscape.
    API Development, Mobile App Development, Software Development, Cloud Computing
    • 201-500 Members
  • Versent

    Versent

    Denver, United States
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    Versent, located in Denver, CO, is a leading technology company specializing in a wide range of services to help businesses thrive in the digital era.
    API Development, Software Development, Cloud Computing, IoT Services
    • 201-500 Members
  • Oasis Intelligence LLC

    Oasis Intelligence LLC

    Orlando, United States
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    Oasis Intelligence LLC is a cutting-edge technology company based in Orlando, FL, dedicated to providing a wide range of development and software solutions to meet the diverse needs of businesses.
    API Development, Web Development, Mobile App Development, Software Development
    • 2-10 Members
  • aPurple

    aPurple

    Lakeville, United States
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    Transforming Startup Ideas into Scalable Success

    aPurple is a premier startup app development company, offering mobile app, SaaS, MVP, software, and web development services that transform innovative startup ideas into market-ready solutions that drive success.
    API Development, Mobile App Development, Software Development, Web Development
    • Founded in 2017
    • 201-500 Members
    • $10 - $24/hr
    • $5,000 to $10,000
  • Netlink Resource Group

    Netlink Resource Group

    United States
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    Custom Software Solutions, API Integration Services, CRM Solutions

      Netlink Resource Group specializes in custom web application development for organizations with complex operational and integration requirements.
    API Development, Mobile App Development, Web Development, Software Development
    • Founded in 1996
    • 11-20 Members
    • $50 - $99/hr
    • $5,000 to $10,000

    Industries Specialization

    Travel 10%

    Startup 10%

    Hospitality & Leisure 10%

    Healthcare 10%

    Enterprise 10%

  • Dev Technosys

    Dev Technosys

    Commerce, United States
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    devtechnosys

    Dev Technosys has been delivering bespoke mobile app development services and web development services to clients all across the world.
    API Development, Mobile App Development, Software Development, Artificial Intelligence
    • Founded in 2010
    • 101-200 Members
    • $100 - $149/hr
    • $5,000 to $10,000
  • Velanapps

    Velanapps

    United States
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    Custom Software. Real Business Impact.

    VelanApps is a trusted outsourcing partner for innovative software development, helping businesses across the globe build scalable and high-performing digital products.
    API Development, Web Development, Mobile App Development, Software Development
    • Founded in 2007
    • 201-500 Members
    • $10 - $24/hr
    • $5,000 to $10,000

    Industries Specialization

    Enterprise 50%

    B2B 50%

  • Netlink Resource Group

    Netlink Resource Group

    Alexandria, United States
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    Custom Technology Solutions for Complex Business Needs Netlink Resource Group helps US businesses and organizations solve complex software, technology, and marketing system challenges.
    API Development, Software Development, Web Development
    • Founded in 1994
    • 11-20 Members
    • $100 - $149/hr
    • $5,000 to $10,000

    Industries Specialization

    Transportation 10%

    Medical 13%

    Hospitality & Leisure 16%

    Healthcare 16%

    Enterprise 19%

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