Top API Development & Integration Firms

API development and integration firms build the interfaces that let software talk to other software, and wire up the ones that already exist. Work ranges from designing REST, GraphQL or gRPC APIs for a product or partner program to connecting payment gateways, CRMs, ERPs, shipping carriers, messaging platforms and banking or healthcare systems through their published APIs. Companies hire for it when staff retype data between two systems, when partners want programmatic access, or when a monolith is being split into services.

Compare firms here on the systems they have integrated before, the documentation they hand over, and how they handle authentication, versioning and outages when a third-party API fails.

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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

8,490 Companies

List of the Best API Development & Integration Agencies

NJC Labs
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NJC Labs is a technology partner that focuses on helping businesses integrate AI, build API-centric architectures, and develop autonomous systems, transforming them into AI-driven enterprises. We assist organizations in replacing outdated point-to-point connections with scalable, reusable APIs, MCP
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Winnersh, England, Gb
Services Provided+3 Services
50% API Development & Integration
20% AI Strategy & Roadmap Consulting
8% Custom AI Chatbot Development
8% Generative AI
AI Summary
“NJC Labs partners with businesses to integrate AI and develop scalable, API-centric architectures, enabling seamless data flow, intelligent automation, and sustainable digital transformation.”
Beacon Co.
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Beacon provides specialized technology solutions and business coaching tailored for home service industries like HVAC, plumbing, and electrical contracting. With a focus on platforms such as ServiceTitan, HouseCall Pro, and FieldEdge, we offer personalized software development, optimization, enhance
Highlights
$5,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% API Development & Integration
50% Business Model Design & Validation
AI Summary
“Beacon delivers specialized technology solutions and business coaching for home service sectors, enhancing software platforms and optimizing business processes through tailored development and strategic advisory.”
Good As Gold Cyber Technologies Inc.
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**Overview** GAG Cyber Technologies is your comprehensive solution for enhancing software development projects, staff augmentation, cybersecurity, and outsourcing/offshoring services. We connect your internal team with a global talent pool through our innovative staffing and outsourcing approaches
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+5 Services
5% Robotic Process Automation (RPA)
5% Cloud Consulting & SI
5% Workflow Automation (Zapier / Make / n8n)
8% Machine Learning Model Development
AI Summary
“Good As Gold Cyber Technologies offers flexible staff augmentation, tailored software development, and cost-effective outsourcing, leveraging global talent and agile methodologies to deliver efficient project solutions.”
Even Rise
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EvenRise: Enhancing Your Marketing Strategy In the rapidly changing digital environment of today, companies require a partner to help them cut through the clutter and differentiate themselves in a competitive market. This is where EvenRise steps in. About Us: EvenRise is more than just a marketin
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided
50% API Development & Integration
50% Graphic Design
AI Summary
“EvenRise is a strategic marketing partner helping companies differentiate themselves and thrive in the dynamic digital landscape through innovative and adaptable marketing solutions.”
APIRobots
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APIRobots is a platform that offers various APIs, giving users direct access to specialized data and insights across different sectors. Its services are designed for developers and businesses aiming to incorporate structured data into their applications. The platform covers a wide range of areas, in
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% API Development & Integration
50% Managed IT Services
AI Summary
“APIRobots provides developers and businesses with reliable APIs offering structured data and insights across diverse sectors, enabling seamless application integration and enhanced functionality.”
All In One - Web3 Agency
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All in One is a contemporary digital agency that focuses on developing web applications of various complexities, including landing pages, corporate sites, and e-commerce platforms. We utilize both content management systems (CMS) like WordPress and OpenCart, as well as advanced frameworks such as Re
Highlights
$1,000+
Min Project Size
10-49
Employees
Services Provided
50% API Development & Integration
50% Web App UI Design
AI Summary
“All in One is a full-service digital agency providing web development, design, cybersecurity, smart contracts, and marketing solutions using CMS and advanced frameworks, ensuring efficient, tailored results.”
GVVA
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GVVA focuses on removing manual bottlenecks through tailored AI integrations and cloud-based automation. Unlike other agencies that provide "rented" solutions, we advocate for tool ownership. We create, develop, and implement efficient operational workflows utilizing AWS, Python, and cutting-edge Ge
Highlights
$1,000+
Min Project Size
2-9
Employees
Johannesburg South, Gauteng, Za
Services Provided+2 Services
8% AI Agent & Multi-Agent System Development
10% Custom AI Chatbot Development
15% Generative AI
12% Workflow Automation (Zapier / Make / n8n)
AI Summary
“GVVA delivers tailored AI and cloud-based automation solutions, enabling businesses to own efficient operational workflows that transform repetitive tasks into strategic advantages globally.”
CDX Insights
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CDX Insights assists organizations in transforming raw data into actionable insights by simplifying application integration and ensuring data readiness for smooth, AI-driven decision-making. We utilize cloud elements and pre-built API integration products to improve application visibility throughout
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Marietta, Georgia, Us
Services Provided+2 Services
50% API Development & Integration
10% AI-Powered Document Processing
5% Robotic Process Automation (RPA)
13% LLM Integration & Prompt Engineering
AI Summary
“CDX Insights specializes in API development and integration, enabling organizations to transform data into actionable insights through streamlined application connectivity and AI-driven decision support.”
Telimize LLC
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Telimize provides scalable cloud communication solutions featuring carrier-grade voice, messaging, and WhatsApp APIs, facilitating worldwide connectivity and enhanced integration for companies.
Highlights
10-49
Employees
Services Provided
50% API Development & Integration
25% Managed IT Services
25% Unified Communications Consulting & SI
AI Summary
“Telimize LLC offers scalable cloud communication solutions with carrier-grade voice, messaging, and WhatsApp APIs, enabling global connectivity and seamless integration for businesses.”
Orbitware
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At Orbitware, we stand out from typical tech companies. We serve as your reliable ally in areas such as APIs and Microservices, Data and Analytics, Salesforce Industries, Talent Solutions, and Nearshore Services. Driven by a strong dedication to excellence and a love for innovative solutions, we hel
Highlights
$250,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided
50% API Development & Integration
35% BI & Big Data Consulting & SI
15% CRM Consulting and SI
AI Summary
“Orbitware is a trusted partner offering expertise in APIs, data analytics, Salesforce Industries, talent solutions, and nearshore services, driving innovative digital transformation for businesses.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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