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 / 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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$5,000+$50 - $99 / hr2 - 9Dover, DE
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See all 1 projectsHumbleDevs is a certified Plaid integration partner for fintech, lending, payments, and identity verification products. We take your integration from scope to secure production launch — and
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$5,000+$50 - $99 / hr2 - 9Athens, TN
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Catalyst Software Solutions is a software development firm established in 2026. Their team offers Custom Software Development and Enterprise App Modernization.
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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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$1,000+$50 - $99 / hr10 - 49Sacramento, CA
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Custom software development company Devyar - Creative Agency was founded in 2015. The team specializes in Custom Software Development and Web Development and is located in Sacramento, California.
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Undisclosed$25 - $49 / hr10 - 49Miami, FL
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See all 2 projectsDeverr is a proficient API Development company offering comprehensive API solutions, including API-as-a-Service and backend services integration. The company receives 100% positive feedback for exceeding client expectations, blending seamlessly with existing teams, and delivering high-quality results efficiently. Reviewers consistently praise their collaboration, speed, and high standard of work.
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UndisclosedUndisclosed50 - 249Palo Alto, CA
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Fiorano is a Business Consulting and API Development company. They offer Business Consulting and API Development and were established in 1995.
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UndisclosedUndisclosed50 - 249Dover, DE
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SuperViz is a web development company and API Development company launched in 2018. The midsize team specializes in Web Development and API Development.
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UndisclosedUndisclosed1,000 - 9,999Dayton, OH
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Founded in 1910, Vivial Connect is a SEO company and API Development company. The firm offers Search Engine Optimization and API Development, and is large.
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$10,000+$50 - $99 / hr50 - 249Lubbock, TX
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Established in 2020, Hifi Devs is a custom software development company. The team offers Custom Software Development and Web Development and is headquartered in Lubbock, Texas.
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$5,000+$100 - $149 / hr50 - 249Longmont, CO
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Realware LLC, a midsize IT strategy consulting company, is located in Longmont, Colorado. The team provides IT strategy consulting and Cybersecurity.
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$5,000+$25 - $49 / hr2 - 9Sheridan, WY
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See all 3 projectsDojo Labs is a development company specializing in AI solutions and SaaS platforms. With a consistent track record of meeting deadlines and exceeding expectations, 100% of reviewers praise their strong communication, execution, and customer-facing skills. Clients highlight their economical pricing and expertise in AI development, with no negative feedback reported.
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$1,000+$25 - $49 / hr10 - 49Sheridan, WY
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See all 1 projectsJSS Devs specializes in providing tailored solutions, including ERP implementation with comprehensive modules such as inventory management and human resources. Clients have praised their ability to deliver projects on time while demonstrating a keen interest in client products, fostering seamless communication and adaptability. Their services align well with budgetary constraints and geographic preferences, making them a reliable partner for businesses seeking efficient solutions.
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Undisclosed$100 - $149 / hrFreelancerLittleton, CO
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See all 1 projectsDigital Pixel is a web development and IT support company, praised for their exceptional customer service and attentiveness. 100% of the reviewers highlight their prompt responses and effective communication. Their ability to deliver valuable services, such as website development and IT security support, makes them a reliable choice for technical assistance and website management needs.
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$5,000+$100 - $149 / hr2 - 9Trumbull, CT
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Launched in 1999, DLS Solutions, Inc. Is a custom software development company. Their team provides Custom Software Development and UX/UI Design.
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$25,000+Undisclosed50 - 249Coppell, TX
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Kiranam Technologies is a software development firm. The midsize Coppell, Texas-based team focuses on Custom Software Development and Artificial Intelligence. The company was founded in 2012.
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Undisclosed$25 - $49 / hr2 - 9Durham, NC
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INSITE GURU is a web design agency. The firm is located in Durham, North Carolina. Their team provides Web Design and Web Development.
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$5,000+$25 - $49 / hr2 - 9Palatine, IL
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Established in 2019, TSYFRA is a SEO agency. Their team focuses on Search Engine Optimization and Web Development.
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Undisclosed$25 - $49 / hr2 - 9Rolling Meadows, IL
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Placematic USA LLC is a website development company. The team focuses on Web Development and Mobile App Development, and the company is located in Rolling Meadows, Illinois.
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UndisclosedUndisclosed10 - 49Newburyport, MA
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DevOps Managed Services company Elyxor was established in 2010. The team offers DevOps Managed Services and cloud consulting & SI.
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$1,000+$150 - $199 / hrFreelancerAtlanta, GA
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See all 1 projectsFAI Agency is a specialized AI solutions firm that excels in implementing strategies for website indexing by large language models. The reviews highlight their exemplary project management, with 100% positive feedback commending their flexibility, responsiveness, and technical expertise. Notably, Jamal's commitment to project success and seamless collaboration is frequently emphasized. One minor area for improvement mentioned involved communication clarity during virtual meetings.
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$1,000+$150 - $199 / hr2 - 9Denville Township, NJ
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Small software development firm SlashHash LLC, is located in Denville Township, New Jersey. Their services include Custom Software Development and Web Development.
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$1,000+$50 - $99 / hr2 - 9Charlotte, NC
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Nova Via is a custom software development company. Founded in 2022, the company is located in Charlotte, North Carolina. Their services include Custom Software Development and Mobile App
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UndisclosedUndisclosed2 - 9Cheektowaga, NY
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Graveyard Jokes is a web design company. The Cheektowaga, New York-based team provides Web Design and Web Development.
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$5,000+$100 - $149 / hr2 - 9Omaha, NE
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Custom software development firm Method Development was founded in 2005. The small team provides Custom Software Development and Web Development.
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$10,000+$150 - $199 / hr2 - 9Fayetteville, AR
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Small e-commerce development company Candela, is based in Fayetteville, Arkansas. Their services include E-Commerce Development and Web Development.
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$5,000+$25 - $49 / hr10 - 49Surfside, FL
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See all 2 projectsArcadia Tech is a distinguished provider of API Development Services, specializing in backend support and API integration for innovative projects. Clients praise their exceptional delivery quality, with 100% positive feedback highlighting their commitment and effective project management. Notably, they excel in creating scalable and extendable API solutions, consistently meeting project timelines and fostering strong partnerships.
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$1,000+$25 - $49 / hr10 - 49Winchester, VA
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ZealousCommerce is an e-commerce development firm. They are in Winchester, Virginia and have small team. They offer E-Commerce Development and Mobile App Development.
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$10,000+$150 - $199 / hr10 - 49Irvine, CA
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Established in 2018, Conveyance Solutions is a small Irvine, California-based ERP consulting and SI company. Their team offers ERP consulting and SI and API Development.
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$1,000+$100 - $149 / hr2 - 9San Francisco, CA
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GeniusHub, a CRM consulting and SI company, was founded in 2018. They offers CRM consulting and SI and AI Consulting.
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Undisclosed$25 - $49 / hr10 - 49Palo Alto, CA
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9bloom Inc. Is a business intelligence company. The Palo Alto, California-based team offers BI & big data consulting & SI and ERP consulting and SI.
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$10,000+$100 - $149 / hr10 - 49Marietta, GA
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CDX Insights is a small big data analytics company. Launched in 2020, the team provides BI & big data consulting & SI and cloud consulting & SI.
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$25,000+$50 - $99 / hr10 - 49Chicago, IL
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Pixelum, a Content Marketing company, was launched in 2024. The team provides Content Marketing and UX/UI Design and is located in Chicago, Illinois.
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UndisclosedUndisclosed10 - 49Sheridan, WY
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Based in Cumilla, Bangladesh and Sheridan, Wyoming, NextLine Technologies is a SEO agency. Launched in 2025, the team provides Search Engine Optimization and Web Design.
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$1,000+$300+ / hr10 - 49East Orange, NJ
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Haiman Resources Consulting is an IT strategy consulting company founded in 2018. Located in East Orange, New Jersey, the team specializes in IT strategy consulting and cloud consulting & SI.
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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+$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 -
$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 -
UndisclosedUndisclosed10 - 49Draper, UT
Ability to deliver
36.5/40.017.4/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
10% API Development90% Other -
$25,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
36.3/40.017.4/20 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 -
$10,000+$150 - $199 / hr50 - 249Wilder, KY
Ability to deliver
35.4/40.017/20 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 -
$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 -
$5,000+$100 - $149 / hr10 - 49Houston, TX
Ability to deliver
33/40.016.8/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
15% API Development85% 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 -
$5,000+$25 - $49 / hr50 - 249Davie, FL
Ability to deliver
32.4/40.017.6/20 Reviews9.6/10 Clients & Experience5.2/10 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 -
$10,000+$50 - $99 / hr2 - 9Sheridan, WY
Ability to deliver
29.9/40.016.6/20 Reviews8.8/10 Clients & Experience4.6/10 Market PresenceService focus
10% API Development90% 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
28.8/40.016.4/20 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
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.