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

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Expert-Recommended API Development Companies in United States

162 Companies Showing 101 - 150 Updated on October 27, 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
  • SmartBear

    SmartBear

    Somerville, United States
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    Located in the vibrant city of Somerville, MA, SmartBear is a leading technology company that offers a comprehensive range of services to meet the evolving needs of businesses in the digital age.
    API Development, Cloud Computing, eCommerce Development, User Experience
    • 201-500 Members
  • Integrant, Inc.

    Integrant, Inc.

    San Diego, United States
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    Integrant, Inc. is a leading technology company based in San Diego, CA, specializing in a wide range of innovative services to meet the diverse needs of businesses across various industries. With a strong focus on cutting-edge solutions, Integrant, Inc.
    API Development, Artificial Intelligence, Testing, Web Development
    • 201-500 Members
  • Keylent Inc

    Keylent Inc

    Wilmington, United States
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    Keylent Inc, based in Wilmington, DE, specializes in a wide range of cutting-edge services to help businesses thrive in the digital age.
    API Development, Mobile App Development, Artificial Intelligence, Big Data & BI
    • 201-500 Members
  • Carrollton Enterprise Services

    Carrollton Enterprise Services

    New Orleans, United States
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    Carrollton Enterprise Services is a leading tech company based in the vibrant city of New Orleans, LA. Specializing in a wide range of cutting-edge services, we are dedicated to providing innovative solutions to meet the diverse needs of our clients.
    API Development, Software Development, Consulting, Cyber Security
    • 51-100 Members
  • Headstorm LLC.

    Headstorm LLC.

    Addison, United States
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    Headstorm LLC, based in Addison, TX, is a leading technology company offering a wide range of services to meet the diverse needs of businesses.
    API Development, Mobile App Development, Artificial Intelligence, User Experience
    • 51-100 Members
  • Applied AI Consulting

    Applied AI Consulting

    McKinney, United States
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    Applied AI Consulting is a cutting-edge technology company based in McKinney, TX, specializing in a wide range of IT services to help businesses thrive in the digital age.
    API Development, Cloud Computing, Software Development, User Experience
    • 51-100 Members
  • IMRS, LLC

    IMRS, LLC

    St. Petersburg, United States
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    IMRS, LLC is a cutting-edge technology company based in St. Petersburg, FL. We pride ourselves on delivering innovative solutions that propel businesses towards success. Our team is dedicated to providing top-notch services tailored to meet the unique needs of each client.
    API Development, Software Development, DevOps, User Experience
    • 2-10 Members
  • Global Quality Partners

    Global Quality Partners

    Boston, United States
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    Global Quality Partners is a Boston-based tech company dedicated to delivering top-notch solutions tailored to meet your business needs. With a passion for innovation and a commitment to excellence, we pride ourselves on being your trusted partner in the digital world.
    API Development, Software Development, User Experience, DevOps
    • 2-10 Members
  • Async7, LLC

    Async7, LLC

    Houston, United States
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    Based in the vibrant city of Houston, TX, Async7, LLC is a cutting-edge technology company at the forefront of innovation. We specialize in a wide range of services tailored to meet the diverse needs of our clients in the digital landscape.
    API Development, Mobile App Development, User Experience, Artificial Intelligence
    • 2-10 Members
  • Quaversal

    Quaversal

    Charlotte, United States
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    Quaversal is a leading tech company based in Charlotte, NC, dedicated to transforming businesses through innovative solutions. Our passion for Development and cutting-edge technology drives us to deliver top-tier services tailored to meet the unique needs of our clients.
    API Development, Artificial Intelligence, DevOps, Managed Services
    • Freelancer
  • TechXi

    TechXi

    Houston, United States
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    TechXi is a leading technology company based in Houston, TX, offering a wide range of innovative services to meet the diverse needs of businesses in today's digital landscape.
    API Development, User Experience, Software Development, eCommerce Development
    • 51-100 Members
  • STEPS Talent

    STEPS Talent

    Chandler, United States
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    STEPS Talent is a cutting-edge technology company based in Chandler, AZ, that specializes in a wide range of services to meet the diverse needs of businesses in today's digital landscape.
    API Development, Software Development, Artificial Intelligence, DevOps
    • 21-50 Members
  • Optimoz, Inc.

    Optimoz, Inc.

    Rockville, United States
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    Optimoz, Inc. is a technology company based in Rockville, MD, offering a wide range of services to help businesses thrive in the digital age. Our team of experts is dedicated to providing innovative solutions tailored to meet the unique needs of each client.
    API Development, Software Development, Artificial Intelligence, DevOps
    • 21-50 Members
  • 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

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