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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UndisclosedUndisclosed2 - 9Glendale, CA
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Established in 2010, toKernel is a web design agency. Their services include Web Design and Custom Software Development.
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UndisclosedUndisclosed2 - 9St. Louis, MO
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In St. Louis, Missouri, Reikam Labs is a small web design agency. The team offers Web Design and UX/UI Design.
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UndisclosedUndisclosed2 - 9Lexington, KY
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Rocker is a small Lexington, Kentucky-based IT strategy consulting company. The team provides IT strategy consulting and Web Development.
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UndisclosedUndisclosed2 - 9San Juan Capistrano, CA
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Located in San Juan Capistrano, California, SwiftLead is a small web design company. Their services include Web Design and cloud consulting & SI.
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UndisclosedUndisclosed2 - 9Columbus, OH
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Iron Pulley is an Advertising company. Their small team is based in Columbus, Ohio. Their services include Advertising and Pay Per Click.
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Undisclosed< $25 / hr2 - 9Dover, DE
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SignalEDI Inc is a Dover, Delaware-based API Development company. The team offers API Development and Supply Chain Management.
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Undisclosed< $25 / hrFreelancerJasper, GA
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Starrett Projects is a web development firm. They were established in 2022, and their services include Web Development and Custom Software Development.
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$1,000+$150 - $199 / hr10 - 49The Colony, TX
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AlaMark Technologies is a custom software development firm. They specialize in Custom Software Development and Web Development and were established in 1999. The firm is based in The Colony, Texas.
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UndisclosedUndisclosed10 - 49San Jose, CA
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HiTech ERP Solutions Inc is a cloud consulting & SI company. Based in San Jose, California, the team provides cloud consulting & SI and ERP consulting and SI.
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UndisclosedUndisclosed10 - 49Pembroke Pines, FL
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Mertech Data Systems, Inc. Is a small custom software development firm based in Pembroke Pines, Florida and Fresno, California. The team offers Custom Software Development and cloud consulting & SI.
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UndisclosedUndisclosed10 - 49San Tan Valley, AZ
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In San Tan Valley, Arizona, Web Services Pros is an e-commerce development firm. They provide E-Commerce Development and API Development and were established in 2014.
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UndisclosedUndisclosed10 - 49Oxford, MD
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Redkik, Inc is a custom software development company founded in 2020. The team focuses on Custom Software Development and Insurance Services & Brokers and is located in Oxford, Maryland.
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UndisclosedUndisclosed10 - 49Tempe, AZ
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CRM consulting and SI company Bara Agency is in Tempe, Arizona. Established in 2019, the team focuses on CRM consulting and SI and Web Design.
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UndisclosedUndisclosed10 - 49Alpharetta, GA
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Elegant Software Solutions is a custom software development firm based in Alpharetta, Georgia. Launched in 2007, the team provides Custom Software Development and cloud consulting & SI.
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UndisclosedUndisclosed10 - 49Atlanta, GA
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TwinEngines, Inc. Is an Atlanta, Georgia-based cloud consulting & SI company. They specialize in cloud consulting & SI and Generative AI and were established in 1995.
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UndisclosedUndisclosed10 - 49Henderson, NV
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Web3Box Software LLC is an UX design company founded in 2015. The team provides UX/UI Design and cloud consulting & SI.
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UndisclosedUndisclosed10 - 49Louisville, KY
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Brick Bridge Consulting is a small IT strategy consulting company headquartered in Louisville, Kentucky. The team specializes in IT strategy consulting and Custom Software Development.
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UndisclosedUndisclosed10 - 49Portland, OR
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Dymaptic is a big data company. They are based in Portland, Oregon and have small team. They offer BI & big data consulting & SI and Custom Software Development.
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UndisclosedUndisclosed10 - 49Salem, OR
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Launched in 2017, Devmatics is a business intelligence company. Based in Salem, Oregon, the team offers BI & big data consulting & SI and Custom Software Development.
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UndisclosedUndisclosed10 - 49New York, NY
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FYXO is a small New York, New York-based user experience design agency. Their services include UX/UI Design and cloud consulting & SI.
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UndisclosedUndisclosed10 - 49New York, NY
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Shift Lab is an UX agency. They specialize in UX/UI Design and cloud consulting & SI and are located in New York, New York.
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UndisclosedUndisclosed10 - 49Spring Valley, NY
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Evelt is a web design company in Spring Valley, New York. They offer Web Design and UX/UI Design and were founded in 2008.
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UndisclosedUndisclosed10 - 49Boston, MA
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Established in 2009, Janeiro Digital is a small Boston, Massachusetts-based API Development company. Their team specializes in API Development and Digital Strategy.
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UndisclosedUndisclosed10 - 49Summerville, SC
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Apothesource, Inc. Is an API Development company based in Summerville, South Carolina. They provide API Development and DevOps Managed Services.
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UndisclosedUndisclosed10 - 49East Rutherford, NJ
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Neurasol Inc is an UX design company. Their small team is headquartered in East Rutherford, New Jersey. Their team specializes in UX/UI Design and BI & big data consulting & SI.
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UndisclosedUndisclosed10 - 49Austin, TX
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Vulk Coop is an Austin, Texas-based user experience company. They focus on UX/UI Design and cloud consulting & SI and were established in 2013.
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UndisclosedUndisclosed10 - 49Jersey City, NJ
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Application Testing company Abeyis Solution was established in 2022. The firm offers Application Testing and BI & big data consulting & SI.
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UndisclosedUndisclosed10 - 49Vienna, VA
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K2S | Koncepts2Solutions is an Application Testing company headquartered in Vienna, Virginia. The team specializes in Application Testing and Robotics Process Automation.
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UndisclosedUndisclosed10 - 49Pittsburgh, PA
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ForAllSecure is an IT managed services company. Their small team is located in Pittsburgh, Pennsylvania. Their services include IT managed services and Application Testing.
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UndisclosedUndisclosed10 - 49Houston, TX
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Empact IT is a big data company. The Houston, Texas-based company was established in 1998. Their services include BI & big data consulting & SI and Custom Software Development.
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UndisclosedUndisclosed10 - 49San Francisco, CA
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PostHog, Inc. Is a Market Research company. Based in San Francisco, California, their team focuses on Market Research and BI & big data consulting & SI.
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UndisclosedUndisclosed10 - 49Detroit, MI
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Detroit Exposure is a small software development firm launched in 2007. Their team specializes in Custom Software Development and Web Development.
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UndisclosedUndisclosed10 - 49Kenilworth, NJ
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Capture Technologies is an Event Marketing company. The Kenilworth, New Jersey-based company was founded in 2000. Their services include Event Marketing and BI & big data consulting & SI.
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UndisclosedUndisclosed10 - 49Seattle, WA
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Established in 2019, UpTop Health is a Digital Strategy company. Their services include Digital Strategy and UX/UI Design.
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UndisclosedUndisclosed10 - 49New Orleans, LA
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Product Design company Haptech Defense Systems was established in 2014. The company focuses on Product Design and AR/VR development.
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UndisclosedUndisclosed10 - 49San Francisco, CA
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729 Solutions is a branding company. Based in San Francisco, California, the firm was established in 2003. Their services include Branding and IT managed services.
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UndisclosedUndisclosed10 - 49Lehi, UT
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Red Canyon Media is a SEO company. The Lehi, Utah-based company offers Search Engine Optimization and Marketing Strategy.
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Undisclosed$50 - $99 / hrFreelancerSheridan, WY
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See all 1 projectsGenesis Studio builds websites and digital solutions for businesses that need a reliable partner, not just a contractor. We create landing pages, business websites, e-commerce projects, redesigns,
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UndisclosedUndisclosed2 - 9New York, NY
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Software development company Skycode Solutions is in New York, New York. The team specializes in Custom Software Development and Mobile App Development.
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$50,000+$50 - $99 / hr50 - 249Long Beach, CA
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See all 1 projectsBycoders_ is a distinguished IT company specializing in mobile application development, noted for their ability to deliver projects with an exceptional cost-benefit ratio. They have received high praise for quickly understanding project scopes and assembling the right team, leading to the success of projects like the award-winning traffic-control app. Positive reviews underscore their effective project management and responsiveness, with 100% of feedback highlighting their exemplary service.
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$5,000+$100 - $149 / hr2 - 9Littleton, CO
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Truvisory® is a small IT strategy consulting company located in Littleton, Colorado. The team focuses on IT strategy consulting and Custom Software Development.
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$50,000+$50 - $99 / hr50 - 249Scottsdale, AZ
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See all 2 projectsGate6, Inc. is a web development company renowned for its creative, professional, and detail-oriented approach to building websites. Clients praise their ability to align with company values, prompt communication, and project management, with 100% of reviewers expressing satisfaction and no areas for improvement noted.
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UndisclosedUndisclosed250 - 999Culver City, CA
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Custom software development firm Test Pro is located in Culver City, California. The team specializes in Custom Software Development and Application Testing.
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UndisclosedUndisclosed250 - 999Chicago, IL
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Launched in 2001, Basis Technologies is an Advertising company. The team focuses on Advertising and Direct Marketing and is headquartered in Chicago, Illinois.
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UndisclosedUndisclosed250 - 999Irvine, CA
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Launched in 2015, Arctiq is a midsize IT strategy consulting company. Their services include IT strategy consulting and unified communications consulting & SI.
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UndisclosedUndisclosed250 - 999Jacksonville, FL
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Revalize is a custom software development firm. They are located in Jacksonville, Florida. Their team offers Custom Software Development and CRM consulting and SI.
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UndisclosedUndisclosed50 - 249St. Charles, IL
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Iyka Enterprises Inc., a midsize API Development company, is headquartered in St. Charles, Illinois. The team offers API Development.
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UndisclosedUndisclosedFreelancerGreenwich, CT
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END-Labs, a small Blockchain company, is based in New York City, New York and Greenwich, Connecticut. Their services include Blockchain and API Development.
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Undisclosed$50 - $99 / hr2 - 9McKinney, TX
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Quixet is a mobile application development firm. The McKinney, Texas-based company was founded in 2019. Their services include Mobile App Development and Web Development.
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Undisclosed$150 - $199 / hr2 - 9Olathe, KS
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Cloud consulting & SI company Indigo Logic LLC specializes in cloud consulting & SI and Web Development. They are in Olathe, Kansas.
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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.