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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$5,000+$150 - $199 / hr2 - 9New York, NY
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Switchboard, an AI Consulting and API Development company, was founded in 2024. The team offers AI Consulting and API Development.
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$50,000+$50 - $99 / hr50 - 249McLean, VA
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DXFactor is a website development company. They are based in McLean, Virginia and have midsize team. They specialize in Web Development and Mobile App Development.
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$50,000+$150 - $199 / hr50 - 249Indianapolis, IN
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Launched in 2000, E-gineering, Inc. Is a custom software development company. The agency specializes in Custom Software Development and Web Development.
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$1,000+$100 - $149 / hr2 - 9Durango, CO
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See all 1 projectsEdges First, LLC is a web design company recognized for its ability to create functional and visually appealing websites. The firm demonstrates strong alignment with client values and the flexibility to adapt to changing project needs. Positive feedback is overwhelmingly prevalent, with 100% of reviewers noting their responsive communication and impressive ability to interpret and execute client desires effectively.
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$25,000+$50 - $99 / hr10 - 49San Jose, CA
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See all 1 projectsCrea specializes in Application Programming Interface Development, offering seamless solutions for payment platforms integrated with top-tier banks. Their reviews highlight exceptional project management, responsiveness, and technical expertise, demonstrating a commitment to client success and innovation. Clients particularly appreciate their ability to deliver high-quality, bug-free solutions within tight timelines, enhancing the overall user experience.
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$100,000+$25 - $49 / hr250 - 999Boca Raton, FL
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SrinSoft Inc is a custom software development firm. Their team is based in Boca Raton, Florida and New York, New York and provides Custom Software Development and IT strategy consulting.
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$25,000+$25 - $49 / hr10 - 49New York, NY
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Cryptex Technologies is a small website development firm. Founded in 2007, the team offers Web Development and Custom Software Development.
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$5,000+$25 - $49 / hr50 - 249Brooklyn, NY
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TRUEPREDiCT is a custom software development firm launched in 2018. The firm provides Custom Software Development and API Development.
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$5,000+$25 - $49 / hr2 - 9Cedar Hills, UT
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See all 1 projectsMarketing Fruit Apps specializes in mobile game development and marketing services, including programming, graphic design, and promotional videos. Overall, their reviews highlight their punctual project management, excellent communication, and dedication to meeting client needs. Clients particularly praise their speed, attention to detail, and professional approach, with no noted areas for improvement.
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UndisclosedUndisclosed10 - 49Atlanta, GA
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Founded in 1999, ZAPTEST is an application development firm. The team provides Mobile App Development and API Development.
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$5,000+$150 - $199 / hr2 - 9New York, NY
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Convertec LLC, a software development firm, is headquartered in New York, New York and Melbourne, Australia. Launched in 2023, the team focuses on Custom Software Development and Web Development.
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$1,000+$100 - $149 / hr2 - 9New York, NY
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Redirect.pizza, an unified communications consulting & SI company, was established in 2021. The small team focuses on unified communications consulting & SI and IT managed services.
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$5,000+$150 - $199 / hr10 - 49Bigfork, MN
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AfterNorth is a small Conversion Optimization company. They provide Conversion Optimization and IT managed services and were founded in 1998.
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$5,000+$25 - $49 / hr10 - 49Brooklyn, NY
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Coder Crew is an user experience design agency. Their team is based in Brooklyn, New York and Lahore, Pakistan and focuses on UX/UI Design and Web Development.
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$5,000+Undisclosed50 - 249McKinney, TX
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Tymon Global is an AI development company. The agency is located in McKinney, Texas. Their team focuses on Artificial Intelligence and cloud consulting & SI.
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$5,000+$50 - $99 / hr2 - 9Dyer, IN
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See all 2 projectsCrispy Software Solutions is a software development company specializing in creating custom platforms for workforce development and remote staffing. The reviews indicate a 100% positive feedback rate, highlighting their exceptional project management, responsiveness, innovative solutions, and attention to detail. Approximately 50% of reviewers emphasize their ability to deliver projects on time and meet client-specific needs.
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UndisclosedUndisclosed10 - 49Santa Cruz, CA
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ProductOps, Inc. Is a small data analytics company launched in 2008. Their team focuses on BI & big data consulting & SI and Custom Software Development.
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$1,000+$50 - $99 / hr2 - 9San Diego, CA
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In San Diego, California, Namazu Studios is a custom software development company. The team focuses on Custom Software Development and Web Development.
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$1,000+$50 - $99 / hr10 - 49San Francisco, CA
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Zavod-IT is an AI company. Their small team is located in San Francisco, California. Their services include Artificial Intelligence and API Development.
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$5,000+Undisclosed10 - 49Chicago, IL
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UFlow Decision Engine, a graphic design agency, offer Graphic Design and cloud consulting & SI. They were founded in 2020.
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Undisclosed$100 - $149 / hr2 - 9Chesapeake, VA
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Cloud Dog Consulting is a small software development company based in Chesapeake, Virginia. The team offers Custom Software Development and API Development.
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$10,000+$25 - $49 / hr10 - 49Katy, TX
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See all 2 projectsSTA Soft is a software development company that excels in delivering end-to-end solutions, focusing on backend development, system architecture, and website implementation. Overall, 100% of reviews highlight their reliability, technical competence, and impressive project management skills, with a strong emphasis on communication and timely delivery. Reviewers consistently praise their ability to enhance system performance and scalability while providing excellent value for cost.
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$1,000+$25 - $49 / hr2 - 9Houston, TX
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SRQ Robotics LLC is a mobile application development company. Their team is located in Houston, Texas and Colombo, Sri Lanka. The agency specializes in Mobile App Development and IoT development.
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Undisclosed$150 - $199 / hr10 - 49Chicago, IL
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Scalesology is a big data company. They are based in Chicago, Illinois and Denver, Colorado, and their services include BI & big data consulting & SI and Custom Software Development.
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$5,000+$150 - $199 / hr50 - 249Libertyville, IL
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Bitovi, an Enterprise App Modernization company, is based in Libertyville, Illinois. They specialize in Enterprise App Modernization and Custom Software Development and were launched in 2007.
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$10,000+$25 - $49 / hr10 - 49South Barrington, IL
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AptlyLabs Inc is a small software development company. They offer Custom Software Development and Web Development and were launched in 2018.
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$25,000+$100 - $149 / hr10 - 49Omaha, NE
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DevObsessed is an IT staff augmentation company based in Omaha, Nebraska. Established in 2022, the team specializes in IT staff augmentation and Custom Software Development.
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$5,000+$25 - $49 / hr50 - 249Buffalo, NY
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The Offshore Developers LLC is an application development firm. The Buffalo, New York-based company was founded in 2025. Their services include Mobile App Development and Web Development.
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$10,000+$25 - $49 / hr10 - 49Boynton Beach, FL
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Launched in 2009, kommit is a website development firm. The small team focuses on Web Development and Custom Software Development.
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$10,000+$100 - $149 / hr50 - 249Golden, CO
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See all 3 projectsDSR Corporation is a versatile technology company specializing in IoT platforms, cybersecurity, and software development, including web and mobile solutions. They are commended for their expertise, innovation, and ability to deliver high-quality, well-structured software on time, with 100% of reviewers highlighting their technical proficiency and attentive project management. Areas for improvement include enhancing communication fluidity and reducing planning bureaucracy.
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$10,000+$50 - $99 / hr50 - 249Los Angeles, CA
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See all 7 projectsDigiNeat Smart Technologies specializes in application programming and mobile app UI/UX design, providing API development services tailored to client needs. Overall, 100% of reviewers praised their excellent communication, attention to detail, and project management skills. Their design work consistently exceeded expectations, showcasing a practical yet aesthetically pleasing approach with no significant areas for improvement noted.
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$25,000+Undisclosed10 - 49Laguna Hills, CA
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SinanSoft is a software development firm. Launched in 2015, the agency is in Laguna Hills, California. Their team offers Custom Software Development and API Development.
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UndisclosedUndisclosed50 - 249Hopkins, MN
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See all 2 projectsAubrant Digital specializes in API Development Services, offering comprehensive solutions like REST API Programming and API Integration. The company has received 100% positive feedback, with clients appreciating their genuine interest in client needs and effective project management. Their alignment with client values and good value for cost are frequently highlighted by reviewers.
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$10,000+$25 - $49 / hr2 - 9Glenview, IL
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Adtitude Digital, an Engineering company, is based in Glenview, Illinois. They specialize in Engineering and BI & big data consulting & SI and were established in 2021.
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$25,000+$50 - $99 / hr2 - 9San Francisco, CA
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Kaizen Deliverables, a web development firm, was launched in 2023. Located in Birmingham, England and San Francisco, California, the team provides Web Development and Mobile App Development.
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$5,000+$50 - $99 / hr10 - 49Pittsburgh, PA
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Foo Bar is a custom software development firm. They offer Custom Software Development and Enterprise App Modernization and were established in 2018. The firm is based in Pittsburgh, Pennsylvania.
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$10,000+Undisclosed2 - 9La Habra, CA
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See all 1 projectsUniversal Informatics LLC is a company specializing in API Development Services, offering expertise in Application Programming Interface Development and API Integration. With 100% positive feedback, clients praise their deep knowledge, prompt communication, and ability to deliver seamless integration solutions across various platforms. The company's values and high ratings make them a preferred choice for technology projects.
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$5,000+$150 - $199 / hr2 - 9Hollywood, FL
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See all 1 projectsCharlotte's Web Design is a web development company specializing in website redesign, optimization, and SEO services. They consistently deliver ahead of schedule, demonstrated by a 62% increase in website traffic and a 73% rise in organic traffic for their clients. Their 100% positive feedback highlights their professionalism, efficiency, and strong communication skills.
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$10,000+$150 - $199 / hr10 - 49Boston, MA
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Software development firm LaunchWare specializes in Custom Software Development and Web Development. They were founded in 2006.
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UndisclosedUndisclosed10 - 49South Plainfield, NJ
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TruGen AI is an AI Agents company. Based in South Plainfield, New Jersey, the agency was established in 2024. Their team focuses on AI Agents and Artificial Intelligence.
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$5,000+$100 - $149 / hr2 - 9Cherry Valley, IL
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See all 1 projectsSW Development Services offers API Development and Application Programming Interface Development, excelling in web security and CRM system integration. Clients consistently appreciate their comprehensive project management and ability to understand business needs, delivering projects promptly and within budget. Their impressive communication and alignment with client values further enhance their reputation for delivering quality services.
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$5,000+$150 - $199 / hr2 - 9Tallmadge, OH
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Work Horse Integrations, an IT strategy consulting company, is based in Tallmadge, Ohio. The team focuses on IT strategy consulting and BI & big data consulting & SI.
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$10,000+$100 - $149 / hr2 - 9Dover, DE
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Launched in 2021, Anvil Development Agency Inc. Is a website development firm. Headquartered in Dover, Delaware, the team provides Web Development and Mobile App Development.
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Undisclosed$200 - $300 / hr50 - 249Northbrook, IL
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Midsize IT strategy consulting company Kokomo24/7®, is in Northbrook, Illinois. Their services include IT strategy consulting and CRM consulting and SI.
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$5,000+$100 - $149 / hr10 - 49Waxhaw, NC
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Cloud consulting & SI company Integrationpath LLC was founded in 2016. The team focuses on cloud consulting & SI and IT managed services and is headquartered in and Waxhaw, North Carolina.
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$1,000+$50 - $99 / hr10 - 49West Palm Beach, FL
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Retailbox is a CRM consulting and SI company launched in 2017. Their services include CRM consulting and SI and ERP consulting and SI.
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UndisclosedUndisclosed10 - 49San Francisco, CA
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OneNotary is a Litigation Support Services company. The team focuses on Litigation Support Services and API Development and is in San Francisco, California.
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$5,000+Undisclosed10 - 49Brooklyn, NY
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In Brooklyn, New York, Redemptive Studios is a small Product Design company. Their services include Product Design and IT staff augmentation.
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UndisclosedUndisclosed10 - 49Mountain View, CA
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See all 1 projectsFor 10 years, we have been successfully enriching businesses of all sizes by developing and implementing customized CRM systems that help leverage data to achieve exceptional results. Specializing
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$100,000+$150 - $199 / hr10 - 49Anchorage, AK
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IQ Lab is an IT staff augmentation company. They are headquartered in Anchorage, Alaska and have small team. They provide IT staff augmentation and Custom Software 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
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
10% API Development90% Other -
$5,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
35.6/40.017.6/20 Reviews10/10 Clients & Experience8/10 Market PresenceService focus
30% API Development70% Other -
$25,000+$50 - $99 / hr10 - 49Seattle, WA
Ability to deliver
37.5/40.018.2/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
10% API Development90% Other -
$1,000+$100 - $149 / hr10 - 49Denver, CO
Ability to deliver
36.7/40.017.6/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
35.9/40.017/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr10 - 49Irvine, CA
Ability to deliver
36.1/40.016.6/20 Reviews10/10 Clients & Experience9.5/10 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 - 49Wilder, KY
Ability to deliver
34.6/40.016.2/20 Reviews10/10 Clients & Experience8.4/10 Market PresenceService focus
15% API Development85% 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
33.4/40.017/20 Reviews10/10 Clients & Experience6.4/10 Market PresenceService focus
15% API Development85% 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 -
$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 -
$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 -
$50,000+$200 - $300 / hr10 - 49San Diego, CA
Ability to deliver
28.6/40.014.6/20 Reviews8.4/10 Clients & Experience5.6/10 Market PresenceService focus
20% API Development80% Other -
$5,000+$150 - $199 / hr10 - 49Jacksonville, FL
Ability to deliver
29/40.016.6/20 Reviews6.7/10 Clients & Experience5.7/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$25 - $49 / hr50 - 249Parker, CO
Ability to deliver
28.3/40.016.2/20 Reviews6.9/10 Clients & Experience5.2/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr2 - 9Alexandria, VA
Ability to deliver
28/40.016.2/20 Reviews7.2/10 Clients & Experience4.6/10 Market PresenceService focus
15% API Development85% Other -
$25,000+$25 - $49 / hr10 - 49Chicago, IL
Ability to deliver
27.8/40.016.6/20 Reviews6.3/10 Clients & Experience4.9/10 Market PresenceService focus
10% API Development90% 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.