Top RPC API Developers in the United States
Remote Procedure Call (RPC) frameworks such as gRPC and JSON-RPC power the high-speed APIs behind today’s SaaS, fintech, and IoT products. If you’re building low-latency microservices or modernizing legacy systems, working with a U.S.-based RPC API developer can shorten feedback loops, ease compliance, and align with North American time zones.
Clutch curates developer profiles, interviews clients, and verifies project data so you can hire with confidence. Use our filters—by hourly rate, tech focus, location, and more—to pinpoint the best fit, whether in Silicon Valley, Austin’s startup corridor, or New York’s fintech scene.
Explore more options:
• Top API Development Companies
• API Development Companies in New York City
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$10,000+$150 - $199 / hr10 - 49Webster Groves, MO
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See all 19 projectsSketch Development is a company specializing in API Development Services, including API Integration and Web Service Development. They are known for their organized, transparent, and responsive project management, with 100% of reviewers highlighting their effective communication and planning. All feedback was positive, showcasing their ability to deliver complex solutions like ERP integration promptly and efficiently.
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$10,000+$150 - $199 / hr10 - 49Irvine, CA
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See all 21 projectsCoSpark is a web development company specializing in WooCommerce and WordPress optimization, server performance, and custom software solutions. Client feedback is overwhelmingly positive, with 100% of reviewers praising their responsiveness, professionalism, and ability to tailor solutions to specific needs. They are commended for their expertise, project management, and cost-effective services, making them highly recommended for businesses seeking reliable web development support.
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UndisclosedUndisclosed10 - 49Draper, UT
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See all 27 projectsMystic Media is a versatile development company providing services including app development, cloud migration, and comprehensive IT solutions. Reviews indicate a highly positive customer experience, with clients praising their project management, communication, and efficiency. Notably, 100% of reviewers mention their effectiveness, meeting or exceeding project expectations, and their hands-on, collaborative approach. Their adaptability and proactive service have consistently delivered successful outcomes across various industries.
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$25,000+$150 - $199 / hr50 - 249Los Angeles, CA
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See all 14 projectsISBX Corp is a versatile software development company specializing in mobile app development, web design, and UX/UI solutions. Client reviews consistently highlight their effective project management, high-quality deliverables, and ability to meet deadlines. Approximately 90% of reviewers commend ISBX for their professionalism, responsiveness, and technical prowess, with no significant areas for improvement noted. Many clients appreciate their problem-solving skills and ability to guide projects through complex challenges.
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$1,000+$50 - $99 / hr10 - 49Provo, UT
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See all 10 projectsBright Bridge Web is a multifaceted web development company, excelling in website creation, mobile app development, and SEO services. Across their reviews, clients consistently praise their effective communication, project management skills, and commitment to client satisfaction, with over 90% of reviews highlighting their responsiveness and adaptability. Clients also commend their ability to deliver high-quality work within budget and often ahead of schedule.
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$5,000+$50 - $99 / hr50 - 249Miami, FL
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See all 26 projectsDTEAM is a versatile application development firm that specializes in API Development Services, excelling in complex projects like web development, project management, and quality assurance. Reviews reveal a 90% positive feedback rate highlighting their exceptional project management, proactive communication, and ability to meet or exceed expectations, with a notable 40% increase in user engagement and operational efficiency.
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$5,000+$25 - $49 / hr10 - 49Chicago, IL
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See all 11 projectsHristov Development is a custom software development agency specializing in AI integration, IT consulting, and agile prototyping. Their reviews demonstrate a 100% positive reception, with clients highlighting their technical expertise, proactive communication, and customer-centric approach. Notably, 80% of reviewers emphasized their innovative solutions and reliable project management. The company is praised for exceeding expectations and delivering timely, scalable, and user-friendly solutions.
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$25,000+$100 - $149 / hr10 - 49Raleigh, NC
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See all 10 projectsZette is a mobile app development company known for its strategic partnership and comprehensive approach to business challenges. Clients consistently praise Zette's ability to deliver high-quality, user-friendly mobile applications while providing valuable insights into growth strategies. Notably, 100% of reviewers highlight their effective communication and thought partnership, with no reported areas for improvement. This indicates a strong alignment with client needs and expectations.
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$10,000+$150 - $199 / hr10 - 49Houston, TX
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See all 4 projectsOptimum Consultancy Services is a diverse digital solutions provider specializing in mobile application development, web design, SEO, and digital marketing. Across four detailed reviews, the company is commended for its responsiveness and high-quality client service, with over 90% positive feedback highlighting their commitment to client satisfaction and effective communication. Optimum is consistently praised for its project management skills and adaptability to client needs.
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$10,000+$25 - $49 / hr50 - 249Parker, CO
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See all 1 projectsUPlanet Inc is a development company specializing in PHP and JavaScript, known for its adaptability and effective project execution. The company has maintained a long-term partnership with clients, who highlight its responsiveness and ability to adjust swiftly to project requirements. The feedback is overwhelmingly positive, with a few areas for improvement such as resource management, mentioned by less than 10% of reviewers.
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$10,000+$150 - $199 / hr2 - 9Pasadena, CA
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See all 2 projectsGeekOffice is a versatile IT development company offering services such as app development, web portals, and IT strategy. Reviews highlight their exceptional flexibility, expertise, and alignment with client needs. With consistently positive feedback, clients praise their ability to go the extra mile, achieving project goals and exceeding expectations, with no areas for improvement noted.
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$5,000+$50 - $99 / hr50 - 249Edison, NJ
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See all 9 projectsI Verve Inc is a technology company offering comprehensive API Development Services, including RESTful API Development and Web Service Development. Reviews reflect a 100% positive experience, emphasizing their solid technical expertise, effective project management, and excellent customer service. Clients appreciate their ability to deliver projects on time and adapt to changing requirements efficiently.
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$10,000+$150 - $199 / hr2 - 9Wilmington, DE
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See all 4 projectsDeSight Studio® GmbH is an API development company recognized for their exceptional API integration and strategic consulting services. With 100% positive feedback, clients commend their precise API programming and seamless integration of digital tools. Their professional project management and proactive communication have significantly enhanced clients' marketing efficiency and operational workflows, leading to notable improvements in email engagement metrics.
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$5,000+$25 - $49 / hr50 - 249Davie, FL
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Alt Digital Technologies, a Microservices Architecture Services company, was launched in 2015. The agency focuses on Microservices Architecture Services and IT managed services.
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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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$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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$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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$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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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+$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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$25,000+$200 - $300 / hr2 - 9Pflugerville, TX
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Plotr AI is a web development firm. The team is located in Pflugerville, Texas, and their services include Web Development and Artificial Intelligence.
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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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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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$5,000+$25 - $49 / hr2 - 9New York, NY
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Radisoft, a small website development firm, is based in New York, New York. The team specializes in Web Development and Mobile App Development.
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$1,000+$50 - $99 / hr2 - 9Laguna Beach, CA
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PAK Digital is a custom software development company. They focus on Custom Software Development and E-Commerce Development and are in Laguna Beach, California.
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$1,000+$50 - $99 / hr10 - 49Diamond Bar, CA
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Founded in 2017, InfoLake LLC, a small custom software development company, is in Diamond Bar, California. Their team specializes in Custom Software Development and Web Development.
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$10,000+$50 - $99 / hr2 - 9Bellevue, WA
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Techufy Inc is a Bellevue, Washington-based Product Design company. They provide Product Design and Custom Software Development.
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$5,000+$25 - $49 / hr10 - 49Austin, TX
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See all 11 projects2BTech LLC specializes in API Development, including Application Programming Interface Development and RESTful API Development. Client feedback highlights their attention to detail, effective project management, and timely delivery. Overall, clients appreciate their clear communication and commitment to meeting requirements.
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$10,000+$50 - $99 / hr2 - 9Miami, FL
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Launched in 2024, ReemRose is a small Miami, Florida-based cloud consulting & SI company. Their services include cloud consulting & SI and Web Development.
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$1,000+$50 - $99 / hr2 - 9Chicago, IL
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Adminix is a software development firm headquartered in Chicago, Illinois and Vyshhorod, Ukraine. Founded in 2022, the team offers Custom Software Development and API Development.
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Undisclosed< $25 / hr50 - 249Dallas, TX
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See all 1 projectsCrystalised Outsprint offers ICT systems development, focusing on electronic case management systems, user training, and post-implementation support. The reviews highlight their dedication to customer needs and delivering value for cost. Clients appreciate their responsiveness and the successful achievement of project milestones through virtual meetings, with no significant areas for improvement noted.
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$5,000+$25 - $49 / hr50 - 249Princeton, NJ
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See all 13 projectsAroopa is an API Development company specializing in comprehensive API integration and application programming services. Overall, clients highlight their impressive responsiveness, timely delivery, and adaptable approach, with 100% positive feedback. Aroopa excels in providing API solutions tailored to diverse business needs, ensuring efficient project execution across various sectors.
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List of the Top 13 United States RPC 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 Development15% RPC API90% 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 Development10% RPC API70% 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 Development15% RPC API90% Other -
UndisclosedUndisclosed10 - 49Draper, UT
Ability to deliver
35.8/40.016.6/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
10% API Development15% RPC API90% 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 Development10% RPC API90% Other -
$5,000+$25 - $49 / hr10 - 49Chicago, IL
Ability to deliver
32.5/40.016.4/20 Reviews9.8/10 Clients & Experience6.3/10 Market PresenceService focus
10% API Development15% RPC API90% Other -
$1,000+$50 - $99 / hr10 - 49Provo, UT
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32.2/40.016.2/20 Reviews8.1/10 Clients & Experience7.9/10 Market PresenceService focus
10% API Development15% RPC API90% 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 Development15% RPC API75% 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 Development10% RPC API85% 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 Development10% RPC API90% Other -
$10,000+$150 - $199 / hr2 - 9Pasadena, CA
Ability to deliver
26/40.016.6/20 Reviews4.2/10 Clients & Experience5.2/10 Market PresenceService focus
20% API Development10% RPC API80% Other -
$5,000+$50 - $99 / hr50 - 249Edison, NJ
Ability to deliver
23.4/40.013.8/20 Reviews4/10 Clients & Experience5.6/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$10,000+$150 - $199 / hr2 - 9Wilmington, DE
Ability to deliver
21.7/40.016.4/20 Reviews0/10 Clients & Experience5.3/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$5,000+$25 - $49 / hr50 - 249Davie, FL
Ability to deliver
14.9/40.00/20 Reviews9.6/10 Clients & Experience5.3/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$25,000+$50 - $99 / hr10 - 49San Jose, CA
Ability to deliver
7.3/40.00/20 Reviews2.7/10 Clients & Experience4.6/10 Market PresenceService focus
10% API Development20% RPC API90% Other -
$5,000+$150 - $199 / hr2 - 9New York, NY
Ability to deliver
5.8/40.00/20 Reviews0/10 Clients & Experience5.8/10 Market PresenceService focus
20% API Development20% RPC API80% Other -
$5,000+$50 - $99 / hr2 - 9Dyer, IN
Ability to deliver
22.9/40.015.8/20 Reviews1.4/10 Clients & Experience5.6/10 Market PresenceService focus
25% API Development10% RPC API75% Other -
$5,000+$100 - $149 / hr2 - 9Cherry Valley, IL
Ability to deliver
4.9/40.00/20 Reviews0/10 Clients & Experience4.9/10 Market PresenceService focus
20% API Development10% RPC API80% Other -
UndisclosedUndisclosed10 - 49Newburyport, MA
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5.3/40.00/20 Reviews0/10 Clients & Experience5.3/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$1,000+$25 - $49 / hr10 - 49Sheridan, WY
Ability to deliver
13.1/40.00/20 Reviews9.1/10 Clients & Experience4/10 Market PresenceService focus
20% API Development15% RPC API80% Other -
$25,000+$200 - $300 / hr2 - 9Pflugerville, TX
Ability to deliver
4/40.00/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
15% API Development20% RPC API85% Other -
$1,000+$50 - $99 / hr10 - 49West Palm Beach, FL
Ability to deliver
4/40.00/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
20% API Development10% RPC API80% Other -
Undisclosed$25 - $49 / hr10 - 49Miami, FL
Ability to deliver
21/40.016.4/20 Reviews0/10 Clients & Experience4.6/10 Market PresenceService focus
12% API Development15% RPC API88% Other -
$5,000+$25 - $49 / hr2 - 9New York, NY
Ability to deliver
4/40.00/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
10% API Development20% RPC API90% Other -
$1,000+$50 - $99 / hr2 - 9Laguna Beach, CA
Ability to deliver
4.9/40.00/20 Reviews0/10 Clients & Experience4.9/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$1,000+$50 - $99 / hr10 - 49Diamond Bar, CA
Ability to deliver
4/40.00/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$10,000+$50 - $99 / hr2 - 9Bellevue, WA
Ability to deliver
4/40.00/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
10% API Development10% RPC API90% Other -
$5,000+$25 - $49 / hr10 - 49Austin, TX
Ability to deliver
28.5/40.016.2/20 Reviews7.1/10 Clients & Experience5.2/10 Market PresenceService focus
10% API Development10% RPC API90% Other
United States RPC API Development FAQs
U.S. developers combine deep expertise in modern RPC frameworks with proximity to the country’s largest tech hubs and enterprise clients. Partnering locally means you unlock:
• Shared business hours for real-time stand-ups and incident response
• Familiarity with U.S. compliance mandates such as SOC 2, HIPAA, and FedRAMP
• Access to world-class talent pools nurtured by universities like MIT, Stanford, and Carnegie Mellon
• Easier on-site collaboration for architecture reviews or security audits
Recent Clutch pricing data shows that most specialized U.S. firms charge $125 – $250 per hour, reflecting senior-level engineering talent and framework expertise. Fixed-scope engagements—such as building a gRPC service layer—often start around $50,000.
For enterprise-scale platforms with high availability and zero-downtime requirements, budgets frequently range from $150,000 to $500,000+. Rates trend highest in San Francisco and Seattle and lowest in emerging hubs like Denver or Raleigh.
Because RPC excels at real-time communication, American agencies often work in a myriad of verticals, including:
• Fintech and payments (low-latency transaction processing)
• Health tech (secure, bidirectional data exchange under HIPAA)
• Logistics and mobility (fleet tracking, telematics)
• Gaming and streaming (high-frequency message passing)
• Industrial IoT (edge-to-cloud connectivity)
- Confirm framework alignment—i.e., gRPC, Thrift, or custom protocol.
- Review case studies that mirror your scale and industry.
- Ask about CI/CD pipelines, observability stacks, and SRE practices.
- Validate team composition: Do architects and DevSecOps engineers stay engaged post-launch?
- Check Clutch reviews for cycle-time metrics, not just star ratings.
Maximizing the resources and filters available on Clutch will help you streamline your search. Shortlist the top two or three options, then schedule an interview to better understand their services and capabilities.
• “One-size-fits-all” quotes without discovery
• Limited experience with streaming or bi-directional RPC calls
• No mention of contract testing or backward-compatibility strategy
• Reluctance to provide performance benchmarks or SLA commitments
• Overreliance on junior staff for protocol design
Red flags are called that for a reason. Ignoring them can only lead to possible mishaps, delays, and regrets.