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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$10,000+$25 - $49 / hr50 - 249San Antonio, TX
Services provided
See all 10 projectsTowa - Nearshore Software Excellence is an API Development Services company known for its Custom Marketplace Development and API Integration expertise. They are highly praised, with 100% positive feedback, for their excellent project management, timely and budget-conscious delivery, and commitment to understanding client needs, consistently exceeding expectations.
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$50,000+$100 - $149 / hr10 - 49Los Gatos, CA
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Slytrunk is a software development firm. Their small team is in Los Gatos, California. Their services include Custom Software Development and Product Design.
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$1,000+< $25 / hr2 - 9Chapmansboro, TN
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Headquartered in Chapmansboro, Tennessee, Pandacuads agency is a SEO agency. Founded in 2019, the team provides Search Engine Optimization and Pay Per Click.
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$1,000+< $25 / hr10 - 49Austin, TX
Services provided
See all 1 projectsWAGWAN Studios is a digital product and web development agency specializing in SaaS development, web app development, website development, UI/UX design, and dedicated team support. We help startups,
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$5,000+$100 - $149 / hr10 - 49Portland, OR
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Launched in 2017, Automated Dreams, a small software development company, is located in Portland, Oregon. Their services include Custom Software Development and CRM consulting and SI.
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$1,000+$100 - $149 / hr2 - 9Cheyenne, WY
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ERP consulting and SI company Suite Certified was launched in 2000. The team provides ERP consulting and SI and CRM consulting and SI and is based in Cheyenne, Wyoming.
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$1,000+$50 - $99 / hr10 - 49McKinney, TX
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Headquartered in McKinney, Texas, RiskSeal, Inc. is a small Generative AI and API Development company. Their services include Generative AI and API Development.
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$1,000+$50 - $99 / hr2 - 9Orlando, FL
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See all 1 projectsRetailbox is a B2B AI automation agency founded in 2017 and based in Orlando, Florida. We help small and mid-market businesses (roughly 10-200 employees) replace repetitive, manual work with
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$1,000+$150 - $199 / hr10 - 49West Palm Beach, FL
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Founded in 2016, Saga IT is an API Development company. The company provides API Development and Custom Software Development.
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$10,000+$25 - $49 / hr50 - 249Gainesville, VA
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Mobifly is a software development company known for creating cross-platform applications with a particular focus on mobile and online solutions. Reviewers consistently highlight their excellent project management, timely delivery, and innovative problem-solving capabilities. Positive feedback comprises approximately 100% of responses, emphasizing Mobifly's commitment and responsibility towards project success.
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$100,000+< $25 / hr2 - 9Columbus, OH
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See all 1 projectsOntoborn Technologies is a website development company noted for its smooth communication and agile development processes. The client feedback is overwhelmingly positive, highlighting the delivery of a modern and professional website that met the project goals. Approximately 100% of reviewers appreciate their on-time delivery and responsiveness, with no areas for improvement noted.
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$1,000+Undisclosed250 - 999New York, NY
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Founded in 1996, Rimes Technologies is a midsize data analytics company. Their team provides BI & big data consulting & SI and Business Consulting.
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$10,000+$25 - $49 / hr10 - 49Sheridan, WY
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HurTech LLC, an UX company, is based in Sheridan, Wyoming. Their services include UX/UI Design and cloud consulting & SI.
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$25,000+Undisclosed2 - 9St. Charles, IL
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Located in St. Charles, Illinois, Wayne Point, LLC is a small Digital Strategy and website development company. Their services include Digital Strategy and Web Development.
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$10,000+$25 - $49 / hr250 - 999Houston, TX
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Established in 1999, TISA Software LLC is a midsize CRM consulting and SI company. Their services include CRM consulting and SI and IT staff augmentation.
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$25,000+$150 - $199 / hr2 - 9Worthington, OH
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See all 7 projectsFoster Commerce is a professional web service development company specializing in API integration and RESTful API development. They have received overwhelmingly positive feedback, with 100% of reviewers praising their project management skills, innovation, and responsiveness. Foster Commerce consistently delivers exceptional results, impressing clients with their problem-solving abilities and commitment to excellence.
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UndisclosedUndisclosed250 - 999Alpharetta, GA
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IT strategy consulting company Opus Technologies was founded in 1997. The company specializes in IT strategy consulting and Cybersecurity, and is midsize.
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UndisclosedUndisclosed50 - 249San Jose, CA
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Eike Consulting is a software development company. Their team is in San Jose, California and provides Custom Software Development and Mobile App Development.
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UndisclosedUndisclosed250 - 999Jacksonville, FL
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Pragma Edge Inc, a big data analytics company, is headquartered in Jacksonville, Florida. Founded in 2013, the team provides BI & big data consulting & SI and cloud consulting & SI.
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$5,000+< $25 / hr250 - 999Dallas, TX
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IoT development company Kemsys Technologies is based in Dallas, Texas. Launched in 2009, the team focuses on IoT development and Application Testing.
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UndisclosedUndisclosed250 - 999Clearwater, FL
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PostcardMania, a print design agency, is based in Clearwater, Florida. Established in 1998, the team offers Print Design and Pay Per Click.
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$1,000+$50 - $99 / hr50 - 249Edison, NJ
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See all 1 projectsIf you are looking for the best PSD to HTML conversion services, look no further than XHTMLCHOP. We have a skilled and experienced team that can handle any kind of conversion project. Whether you
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Undisclosed$25 - $49 / hr2 - 9Sheridan, WY
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See all 1 projectsUpscrape provides real-time data APIs for the platforms businesses monitor: commerce, grocery and quick-commerce, social media, maps and reviews, and advertising libraries.Upscrape provide
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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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UndisclosedUndisclosed50 - 249Austin, TX
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Plivo is an AI Agents company. Located in Austin, Texas, their midsize team offers AI Agents and API Development. The firm was founded in 2011.
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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
Services provided
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
Services provided
TRUEPREDiCT is a custom software development firm launched in 2018. The firm provides Custom Software Development and API Development.
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$10,000+$150 - $199 / hr2 - 9Meridian, ID
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Merakite is a custom software development company launched in 2017. The team specializes in Custom Software Development and Mobile App Development.
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Undisclosed$150 - $199 / hr2 - 9Fort Lauderdale, FL
Services provided
Cuanto Labs is an AI Agents company. Founded in 2019, the company offers AI Agents and API Development.
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UndisclosedUndisclosed250 - 999Cambridge, MA
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Launched in 2013, CapeStart is an AI Agents company. The team provides AI Agents and AI Consulting and is based in Cambridge, Massachusetts.
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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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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+$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+$50 - $99 / hr2 - 9Daytona Beach, FL
Services provided
Sprut Agency is a software development firm. They offer Custom Software Development and Digital Strategy and were founded in 2025. The agency is based in Daytona Beach, Florida.
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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+$100 - $149 / hr2 - 9Gastonia, NC
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See all 3 projectsIMANT Group is a digital services company specializing in website design, development, and brand strategy. Across their reviews, 100% of the feedback highlights their professionalism, attention to detail, and dedication to meeting client needs. Clients appreciate their responsiveness, budget-friendly pricing, and alignment with client values, though some suggest enhancing upfront communication on project requirements.
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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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UndisclosedUndisclosed2 - 9Seattle, WA
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Taliferro Group is a cloud consulting & SI company. The Seattle, Washington-based firm was established in 2020. Their services include cloud consulting & SI 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 -
$5,000+$100 - $149 / hr10 - 49Denver, CO
Ability to deliver
36.8/40.017.8/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr10 - 49Irvine, CA
Ability to deliver
36.3/40.016.8/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
10% API Development90% Other -
$10,000+$150 - $199 / hr50 - 249Wilder, KY
Ability to deliver
35.8/40.017.4/20 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 -
$5,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
31/40.017/20 Reviews10/10 Clients & Experience4/10 Market PresenceService focus
30% API Development70% Other -
$5,000+$100 - $149 / hr10 - 49Houston, TX
Ability to deliver
33.2/40.017/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
15% API Development85% 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 -
$10,000+$200 - $300 / hr10 - 49Miami, FL
Ability to deliver
31.7/40.015.8/20 Reviews9.7/10 Clients & Experience6.2/10 Market PresenceService focus
25% API Development75% Other -
$25,000+$100 - $149 / hr50 - 249Austin, TX
Ability to deliver
32.3/40.019.2/20 Reviews7.5/10 Clients & Experience5.5/10 Market PresenceService focus
15% API Development85% Other -
$5,000+$25 - $49 / hr10 - 49Chicago, IL
Ability to deliver
33/40.016.6/20 Reviews9.8/10 Clients & Experience6.6/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
32.7/40.019/20 Reviews10/10 Clients & Experience3.7/10 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+$50 - $99 / hr10 - 49Seattle, WA
Ability to deliver
32.6/40.018.6/20 Reviews10/10 Clients & Experience4/10 Market PresenceService focus
10% API Development90% 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+$150 - $199 / hr10 - 49Nashville, TN
Ability to deliver
32/40.017.6/20 Reviews10/10 Clients & Experience4.4/10 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 -
$50,000+$50 - $99 / hr10 - 49San Francisco, CA
Ability to deliver
31.3/40.017/20 Reviews10/10 Clients & Experience4.3/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$100 - $149 / hr10 - 49Raleigh, NC
Ability to deliver
29.2/40.016.2/20 Reviews10/10 Clients & Experience3/10 Market PresenceService focus
25% API Development75% Other -
$25,000+$150 - $199 / hr50 - 249Los Angeles, CA
Ability to deliver
30.5/40.016.6/20 Reviews9.6/10 Clients & Experience4.3/10 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+$50 - $99 / hr50 - 249Fairfield, CT
Ability to deliver
29.9/40.016.4/20 Reviews9.2/10 Clients & Experience4.3/10 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 -
$1,000+$25 - $49 / hr50 - 249Sacramento, CA
Ability to deliver
29.1/40.015.6/20 Reviews9.3/10 Clients & Experience4.2/10 Market PresenceService focus
15% API Development85% Other -
$10,000+$50 - $99 / hr2 - 9Sheridan, WY
Ability to deliver
30.1/40.016.8/20 Reviews8.8/10 Clients & Experience4.6/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$150 - $199 / hr10 - 49Atlanta, GA
Ability to deliver
29.8/40.016.4/20 Reviews8.9/10 Clients & Experience4.5/10 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.