Top API Developers in the United States
From Silicon Valley’s cloud innovators to fintech specialists in New York and health-tech hubs in Boston, the United States hosts many of the world’s most sought-after API development teams. A reliable API partner can streamline integrations, unlock new revenue channels, and future-proof your tech stack.
Clutch’s rigorous verification process—detailed client interviews, transparent ratings, and in-depth market data—helps you quickly pinpoint agencies that match your needs. Use filters for hourly rate, industry focus, and location to narrow options and build a shortlist that fits your budget and timeline.
Find more resources here:
• Global Top API Development Companies
• API Development Companies in California
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UndisclosedUndisclosed50 - 249New York, NY
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Zoomin Software is a New York, New York-based Content Writing Services company. They provide Content Writing Services and API Development and were launched in 2015.
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UndisclosedUndisclosed50 - 249Boston, MA
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In Boston, Massachusetts, Ambassador Labs is a midsize cloud consulting & SI company. The team offers cloud consulting & SI and API Development.
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UndisclosedUndisclosed50 - 249Cincinnati, OH
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Snow Commerce, Inc is a midsize Ecommerce Marketing company located in Cincinnati, Ohio. Their services include Ecommerce Marketing and Business Consulting.
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UndisclosedUndisclosed10 - 49Irvine, CA
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Stratus Meridian is a cloud consulting & SI company. Their small team is in Irvine, California. Their team specializes in cloud consulting & SI and API Development.
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UndisclosedUndisclosed10 - 49Nashville, TN
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Zaghop is a web development company. Headquartered in Nashville, Tennessee, the firm offers Web Development and API Development.
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$5,000+$25 - $49 / hr2 - 9Austin, TX
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Cypher Core LLC is an API Development company. In Austin, Texas, the company was founded in 2019. Their services include API Development and Custom Software Development.
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UndisclosedUndisclosed2 - 9Raleigh, NC
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GEOI Solutions, LLC. Is an API Development company. The Raleigh, North Carolina-based company was founded in 2018. Their services include API Development and Custom Software Development.
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UndisclosedUndisclosed2 - 9Boston, MA
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Alpha Vantage Inc., a small artificial intelligence development company, is headquartered in Boston, Massachusetts. Their services include Artificial Intelligence and API Development.
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$5,000+$100 - $149 / hr10 - 49Charlottesville, VA
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Launched in 2015, WebRTC.ventures is a software development company. The company offers Custom Software Development and Mobile App Development.
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$10,000+< $25 / hr50 - 249New York, NY
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See all 12 projectsCogtix Solutions is an API Development services company known for their comprehensive application programming interface solutions, including RESTful API Development and API Integration. Among their reviews, 100% highlighted their exceptional project management and responsive communication, with clients praising their ability to deliver high-quality products on time. Clients also appreciated Cogtix Solutions' motivated team and alignment with company values.
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$10,000+$50 - $99 / hr2 - 9Miami, FL
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Launched in 2024, ReemRose is a small Miami, Florida-based cloud consulting & SI company. Their services include cloud consulting & SI and Web Development.
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$5,000+$50 - $99 / hr2 - 9Raleigh, NC
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See all 6 projectsCloudexis Technolabs is a system development company with expertise in Laravel, known for delivering comprehensive solutions including system development, migration, integration, and support. They have received predominantly positive feedback, with clients praising their timely delivery and proactive approach, though some suggest improvements in communication channels and documentation practices.
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UndisclosedUndisclosed10 - 49Stamford, CT
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Founded in 2020, Directus is a website development firm. The agency focuses on Web Development and API Development, and is small.
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UndisclosedUndisclosed10 - 49Tigard, OR
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Axian is an user experience design agency. They are located in Tigard, Oregon, and their services include UX/UI Design and Enterprise App Modernization.
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UndisclosedUndisclosed50 - 249Akron, OH
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Staffing company Public Insight was launched in 2012. Headquartered in Akron, Ohio, the team focuses on Staffing and Recruiting.
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UndisclosedUndisclosed50 - 249Woodbridge, CT
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ChemWerth Inc. Is a midsize Product Design company located in Woodbridge, Connecticut and Shanghai, China. Their services include Product Design and Compliance Consulting.
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$5,000+$25 - $49 / hr50 - 249Chicago, IL
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See all 3 projectsStudioKrew is a versatile software development company specializing in product development, ERP systems, CRM solutions, and app development for both iOS and Android platforms. With overwhelmingly positive feedback, clients commend their technical flexibility, marketing prowess, and effective communication, with over 90% expressing satisfaction. However, minor improvements in time management have been suggested by 33% of reviewers.
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$10,000+$25 - $49 / hr10 - 49Atlanta, GA
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See all 1 projectsHire FullStacks is a company specializing in API Development Services and other IT solutions. Their reviews highlight a professional culture, timely delivery, and high-quality output, with 100% of reviewers noting satisfaction with project outcomes and management. They effectively collaborate with clients to deliver innovative applications, such as a mobile app for an enterprise selected for a Google mentorship program.
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UndisclosedUndisclosed50 - 249McKinney, TX
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See all 1 projectsApplied AI Consulting is a specialized firm offering AI solution development, including roadmap creation, design, and cloud integration. Overall, the company received positive feedback for delivering high-quality work and maintaining a scalable architecture, with 100% of reviewers noting their expertise in AI and cloud. Though some delays occurred, their commitment to meeting timelines and strong project management was praised.
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UndisclosedUndisclosed2 - 9Newburgh, ME
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Acadia Services & Solutions, LLC is a website development company. They specialize in Web Development and API Development and were launched in 2007. The agency is based in Newburgh, Maine.
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UndisclosedUndisclosed2 - 9Denver, CO
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Updraft is a mobile application development firm launched in 2015. The firm offers Mobile App Development and API Development.
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UndisclosedUndisclosed2 - 9Louisville, KY
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S2 SYSTEMS, LLC is a website development firm. Their team is based in Louisville, Kentucky and offers Web Development and Mobile App Development.
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UndisclosedUndisclosed2 - 9Austin, TX
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JTM Global Enterprises LLC is an IT managed services company. Based in Austin, Texas, the agency focuses on IT managed services and API Development.
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UndisclosedUndisclosed2 - 9Carlsbad, CA
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Launched in 2020, QADeputy is an Application Testing company. The team provides Application Testing and API Development.
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UndisclosedUndisclosed2 - 9New York City, NY
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Consensys Diligence, a Blockchain company, is located in New York City, New York. Established in 2017, the team specializes in Blockchain and API Development.
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$1,000+< $25 / hr10 - 49Fremont, CA
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Founded in 2015, OneGreenDiary is a small ERP consulting and SI company. Their team focuses on ERP consulting and SI and Web Development.
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UndisclosedUndisclosed10 - 49San Diego, CA
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Established in 2017, JopeConnect is a small big data company. Their services include BI & big data consulting & SI and Custom Software Development.
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UndisclosedUndisclosed10 - 49Pittsburgh, PA
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CardChamp is a Pittsburgh, Pennsylvania-based Blockchain company. Established in 2009, the team focuses on Blockchain and ERP consulting and SI.
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$5,000+$25 - $49 / hr10 - 49Huntsville, AL
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See all 3 projectsSOFT PYRAMID LLC is a software development company specializing in web development, custom ecommerce platforms, and enterprise software solutions. Reviews indicate a 100% satisfaction rate, with clients praising their communication, timeliness, and ability to exceed expectations. Their efficient project management and skilled team consistently deliver successful outcomes, making them a highly recommended partner in the industry.
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$1,000+$50 - $99 / hr10 - 49Brentwood, TN
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Devcoded IT Solutions is an API Development company. The firm is headquartered in Pabna, Bangladesh and Brentwood, Tennessee. Their services include API Development and Custom Software Development.
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UndisclosedUndisclosed1,000 - 9,999Chandler, AZ
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Apisero Inc., a big data company, is located in Chandler, Arizona. They focus on BI & big data consulting & SI and ERP consulting and SI.
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UndisclosedUndisclosed50 - 249Pittsford, NY
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User experience company Envision (A Netsmartz Company) is headquartered in Pittsford, New York. Their services include UX/UI Design and cloud consulting & SI.
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UndisclosedUndisclosed50 - 249Sheridan, WY
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Midsize graphic design agency Coin Delta, is in Sheridan, Wyoming. Their services include Graphic Design and IT strategy consulting.
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UndisclosedUndisclosed50 - 249Raleigh, NC
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FintechOps is a Raleigh, North Carolina-based software development firm. They specialize in Custom Software Development and API Development.
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UndisclosedUndisclosed50 - 249Sheridan, WY
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Codegene is a software development company established in 2018. Their team focuses on Custom Software Development and Web Development.
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UndisclosedUndisclosed50 - 249Addison, TX
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Headstorm LLC. Is an AI development company launched in 2016. The team offers Artificial Intelligence and Enterprise App Modernization and is located in Addison, Texas.
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UndisclosedUndisclosed50 - 249Austin, TX
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Brightpearl by Sage is a CRM consulting and SI company. Established in 2007, the firm is located in Austin, Texas. Their team offers CRM consulting and SI and ERP consulting and SI.
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UndisclosedUndisclosed50 - 249Palo Alto, CA
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Launched in 2013, Data Theorem, Inc. Is an app development firm. Their team focuses on Mobile App Development and IT strategy consulting.
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UndisclosedUndisclosed50 - 249Redwood City, CA
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Split Software, Inc. Is an Application Testing company. They offer Application Testing and Custom Software Development and were launched in 2015.
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UndisclosedUndisclosed50 - 249Strasburg, VA
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Launched in 2010, BigData Dimension is a midsize business intelligence company. Their services include BI & big data consulting & SI and cloud consulting & SI.
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UndisclosedUndisclosed50 - 249New York City, NY
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Lumar is a midsize Marketing Strategy company established in 2015. Their services include Marketing Strategy and Search Engine Optimization.
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UndisclosedUndisclosed50 - 249Pittsburgh, PA
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RealogicWorks is an UX design agency. Their midsize team is in Pittsburgh, Pennsylvania and Naples, Florida. Their services include UX/UI Design and IT strategy consulting.
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UndisclosedUndisclosed50 - 249Salmon, ID
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Prescient Security is a Cybersecurity company. The team focuses on Cybersecurity and Application Testing, and the firm is located in Salmon, Idaho.
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UndisclosedUndisclosed50 - 249Tampa, FL
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Miva, Inc. Is a midsize SEO services firm based in Tampa, Florida and San Diego, California. Their services include Search Engine Optimization and Web Design.
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UndisclosedUndisclosed50 - 249San Francisco, CA
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Clarifai, Inc., an AI firm, is based in San Francisco, California. Their services include Artificial Intelligence and Content Moderation Services.
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$25,000+$100 - $149 / hr2 - 9New York, NY
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Small API Development company Mulejoy, is headquartered in New York, New York. Their services include API Development.
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Undisclosed$50 - $99 / hr2 - 9Naperville, IL
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Located in Naperville, Illinois and Budapest, Hungary, Hawkdive Media is a small API Development company. Their services include API Development and Web Development.
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$1,000+$50 - $99 / hr2 - 9Chicago, IL
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Adminix is a software development firm headquartered in Chicago, Illinois and Vyshhorod, Ukraine. Founded in 2022, the team offers Custom Software Development and API Development.
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UndisclosedUndisclosed2 - 9Carlsbad, CA
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Skyblue is a cloud consulting & SI company. Established in 2010, the company specializes in cloud consulting & SI and CRM consulting and SI.
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UndisclosedUndisclosed2 - 9Atlanta, GA
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Caresquad, LLC, an UX company, is located in Atlanta, Georgia. The team offers UX/UI Design and Web Development.
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List of the Top 15 United States API Development Services
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$10,000+$150 - $199 / hr10 - 49Webster Groves, MO
Ability to deliver
39.5/40.020/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
38.1/40.019.2/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
35.4/40.017.4/20 Reviews10/10 Clients & Experience8/10 Market PresenceService focus
30% API Development70% Other -
$25,000+$50 - $99 / hr10 - 49Seattle, WA
Ability to deliver
37.3/40.018/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$150 - $199 / hr10 - 49Nashville, TN
Ability to deliver
36.8/40.018/20 Reviews10/10 Clients & Experience8.8/10 Market PresenceService focus
10% API Development90% Other -
$1,000+$100 - $149 / hr10 - 49Denver, CO
Ability to deliver
36.5/40.017.4/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
10% API Development90% Other -
UndisclosedUndisclosed10 - 49Draper, UT
Ability to deliver
35.8/40.016.6/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr10 - 49Irvine, CA
Ability to deliver
35.7/40.016.2/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr50 - 249Wilder, KY
Ability to deliver
34.8/40.016.4/20 Reviews10/10 Clients & Experience8.4/10 Market PresenceService focus
10% API Development90% Other -
$10,000+< $25 / hr50 - 249Coral Gables, FL
Ability to deliver
34.7/40.016.4/20 Reviews10/10 Clients & Experience8.3/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$50 - $99 / hr50 - 249Fairfield, CT
Ability to deliver
34.1/40.016.4/20 Reviews9.2/10 Clients & Experience8.5/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$100 - $149 / hr10 - 49Houston, TX
Ability to deliver
33.4/40.017.2/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
15% API Development85% Other -
$50,000+$50 - $99 / hr10 - 49San Francisco, CA
Ability to deliver
33.9/40.016/20 Reviews10/10 Clients & Experience7.9/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$200 - $300 / hr10 - 49Miami, FL
Ability to deliver
32.1/40.016.2/20 Reviews9.7/10 Clients & Experience6.2/10 Market PresenceService focus
25% API Development75% Other -
$25,000+Undisclosed50 - 249Blue Ash, OH
Ability to deliver
31.5/40.016.8/20 Reviews7.5/10 Clients & Experience7.2/10 Market PresenceService focus
25% API Development75% Other -
$25,000+$50 - $99 / hr250 - 999Plano, TX
Ability to deliver
32.6/40.015.6/20 Reviews10/10 Clients & Experience7/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$150 - $199 / hr50 - 249Los Angeles, CA
Ability to deliver
33.2/40.016.8/20 Reviews9.6/10 Clients & Experience6.8/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$25 - $49 / hr10 - 49Chicago, IL
Ability to deliver
32.8/40.016.4/20 Reviews9.8/10 Clients & Experience6.6/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$25 - $49 / hr10 - 49Sheridan, WY
Ability to deliver
32.7/40.017.2/20 Reviews10/10 Clients & Experience5.5/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$100 - $149 / hr10 - 49Oakbrook Terrace, IL
Ability to deliver
31.8/40.016.6/20 Reviews10/10 Clients & Experience5.2/10 Market PresenceService focus
15% API Development85% Other -
$10,000+$150 - $199 / hr10 - 49Plano, TX
Ability to deliver
32.3/40.016.4/20 Reviews10/10 Clients & Experience5.9/10 Market PresenceService focus
10% API Development90% Other -
$1,000+$50 - $99 / hr10 - 49Provo, UT
Ability to deliver
32.2/40.016.2/20 Reviews8.1/10 Clients & Experience7.9/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$25 - $49 / hr50 - 249Davie, FL
Ability to deliver
32/40.017.2/20 Reviews9.6/10 Clients & Experience5.2/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$100 - $149 / hr10 - 49Raleigh, NC
Ability to deliver
30.2/40.016.2/20 Reviews10/10 Clients & Experience4/10 Market PresenceService focus
25% API Development75% Other -
$25,000+$150 - $199 / hr10 - 49Atlanta, GA
Ability to deliver
31.8/40.016.4/20 Reviews8.9/10 Clients & Experience6.5/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$25 - $49 / hr10 - 49Naperville, IL
Ability to deliver
31.5/40.016.4/20 Reviews8.3/10 Clients & Experience6.8/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$100 - $149 / hr50 - 249Austin, TX
Ability to deliver
30.2/40.019/20 Reviews6/10 Clients & Experience5.2/10 Market PresenceService focus
15% API Development85% Other -
$5,000+$25 - $49 / hr10 - 49New York, NY
Ability to deliver
30.3/40.016.4/20 Reviews9.9/10 Clients & Experience4/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$50 - $99 / hr10 - 49Fort Wayne, IN
Ability to deliver
30.3/40.016.4/20 Reviews7.9/10 Clients & Experience6/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr10 - 49Houston, TX
Ability to deliver
29.5/40.016.2/20 Reviews5.8/10 Clients & Experience7.5/10 Market PresenceService focus
15% API Development85% Other
United States API Development FAQs
U.S. agencies work at the intersection of leading cloud platforms (AWS, Google Cloud, Microsoft Azure) and fast-moving industries such as fintech and SaaS. Local partners offer:
• Proximity to major tech conferences and venture networks
• Deep familiarity with U.S. compliance standards like HIPAA, SOC 2, and PCI-DSS
• Overlapping time zones for smoother collaboration if your team is also U.S.-based
Whether you need a public API to grow an ecosystem or a private integration to unite legacy systems, U.S. developers can leverage domestic market insights and top-tier talent to accelerate delivery.
API specialists in the U.S. span nearly every vertical. Common sectors include:
• Fintech and banking (payment gateways, open banking)
• E-commerce and retail (product feeds, inventory sync)
• Healthcare (FHIR-compliant patient data exchange)
• Logistics and mobility (real-time tracking APIs)
• Media and entertainment (streaming and rights management)
Niche expertise—such as blockchain, IoT, or AI/ML—can often be found in regional clusters like Austin, Seattle, and San Francisco.
- Define success metrics—throughput, latency, user adoption.
- Shortlist agencies with domain case studies similar to your use case.
- Verify security credentials (SOC 2, ISO 27001) and DevOps tooling.
- Request an architecture proposal and proof-of-concept timeline.
- Check Clutch reviews for project management style and communication transparency.
A brief technical interview with the proposed lead architect often reveals how well the team understands your stack and business goals.
• No clear versioning or documentation plan
• Reliance on proprietary middleware that locks you in
• Vague estimates without a discovery phase
• Limited experience with automated testing, CI/CD, or monitoring
• Inability to explain compliance implications for your industry
Choosing a partner who prioritizes scalability, security, and open standards will save costly rewrites down the road.
Hourly rates usually range from $120 – $225, reflecting senior talent and higher operating costs in major tech cities. Typical project budgets break down as:
- Simple REST or GraphQL endpoint: $15,000 – $30,000
- Mid-sized integration layer (multiple third-party systems): $40,000 – $90,000
- Enterprise-grade, high-availability API platform: $100,000+
Many agencies offer discovery sprints or fixed-price MVP packages to de-risk the scope before long-term engagement.