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

DigitalGate
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DigitalGate is a dependable partner that manages every facet of embedded systems, encompassing both hardware and software. We assist our clients in designing embedded systems customized to meet their particular needs and industry standards. We are the ideal all-in-one solution!
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Timisoara, Timis, Ro
Services Provided+1 Services
13% Custom Web Application Development
10% API Development & Integration
17% Backend Development
10% QA & Software Testing
AI Summary
“DigitalGate offers comprehensive embedded systems solutions, expertly managing hardware and software design to deliver customized, industry-standard products that meet diverse client requirements.”
Devace Technologies
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Devace Technologies stands out as a leading staff augmentation firm in the USA, assisting small to medium-sized businesses, enterprises, and emerging startups in sourcing developers to meet their business needs. We provide access to skilled and professional tech talent, ensuring companies find the p
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided
17% Mobile App Development (iOS & Android)
17% API Development & Integration
16% E-Commerce Development
50% IT Staff Augmentation
AI Summary
“Devace Technologies offers efficient staff augmentation across fintech, healthcare, retail, and tech sectors, connecting businesses with skilled remote developers through a streamlined hiring process.”
MicroTech Group Sdn Bhd (1577430-M)
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Microtech Group Sdn Bhd focuses on providing cutting-edge custom software and design solutions specifically for the public service, digital economy, and small to medium enterprises (SMEs). Our mission is to empower organizations by improving their operational effectiveness and online visibility. By
Highlights
2-9
Employees
Services Provided
20% API Development & Integration
30% Custom Web Application Development
50% Product UX Strategy
AI Summary
“MicroTech Group Sdn Bhd delivers innovative custom software and design solutions, enhancing operational effectiveness and online presence for public services, digital economy, and SMEs.”
Finanta
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Finanta is a commercial lending software platform aimed at assisting banks, non-banking financial companies (NBFCs), and fintech lenders in managing the entire loan lifecycle through a single, cohesive system. It consolidates loan origination, underwriting, servicing, and reporting into one integrat
Highlights
$10,000+
Min Project Size
10-49
Employees
Services Provided
30% Custom Web Application Development
20% API Development & Integration
50% Workflow Automation (Zapier / Make / n8n)
AI Summary
“Finanta is a cloud-based lending platform that streamlines loan lifecycle management for banks and fintechs, enhancing automation, scalability, credit decisions, and operational efficiency across diverse lending sectors.”
Inipy AI
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Every day, companies invest significant amounts in marketing to attract highly qualified visitors to their websites. However, after 5 PM when the office closes, that valuable traffic often disappears. Potential customers with strong intent typically don’t leave messages; instead, they reach out to t
Highlights
2-9
Employees
Services Provided
50% AI Agent & Multi-Agent System Development
30% Custom Web Application Development
20% API Development & Integration
AI Summary
“Inipy AI offers a 24/7 AI intake agent that captures and qualifies leads for high-ticket service industries, preventing after-hours loss and boosting marketing agencies' client growth.”
Code Canvas Creation
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Web Development Services, Tailored Website Solutions, E-Commerce Platforms, Search Engine Optimization, Online Marketing, Mobile Application Development, Brand Development, User Interface/User Experience Design, Software Solutions, IT Advisory, and Cloud Computing Services.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% API Development & Integration
30% E-Commerce Development
50% Web App UI Design
AI Summary
“Code Canvas Creation offers comprehensive IT services, including web and mobile development, e-commerce, SEO, branding, software solutions, cloud computing, and IT advisory to support diverse business needs.”
TAINOSYSTEMS CANADA INC
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Tainosystems: Cross-Border Innovation Tainosystems is a Canadian software development company focused on providing high-quality, tailored solutions for businesses in the United States. With expertise in full-stack development, cloud architecture, and enterprise applications, we merge Canadian tech
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Laval, Quebec, Ca
Services Provided+1 Services
18% API Development & Integration
25% Custom Web Application Development
7% Mobile App Development (iOS & Android)
35% Web App UI Design
AI Summary
“Tainosystems Canada Inc. delivers tailored full-stack and cloud software solutions for U.S. businesses, leveraging nearshore collaboration to accelerate digital transformation with quality and efficiency.”
Extrieve Technologies
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Extrieve Technologies is an Indian software firm that has been assisting businesses in managing their documents and automating work processes since 1996. With more than 25 years of experience, we collaborate with some of India's largest banks, financial institutions, and major corporations to facili
Highlights
10-49
Employees
Noida, Uttar Pradesh, In
Services Provided
30% Custom Web Application Development
20% API Development & Integration
20% Robotic Process Automation (RPA)
30% AI-Powered Document Processing
AI Summary
“Extrieve Technologies delivers AI-driven document management and workflow automation solutions, partnering with Indian banks and corporations to streamline processes, reduce costs, and enable digital transformation.”
Freeman Tech Consulting
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Freeman Tech Consulting is a software engineering company that focuses on web design, cloud infrastructure, compliance, and data analytics. We provide customized solutions for every client, prioritizing outstanding user experiences and strong, scalable applications. Our skills encompass the developm
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Fort Mill, South Carolina, Us
Services Provided
20% API Development & Integration
30% Custom Web Application Development
20% Other IT Consulting and SI
30% Cloud Consulting & SI
AI Summary
“Freeman Tech Consulting delivers customized software engineering solutions nationwide, specializing in web design, cloud infrastructure, compliance management, and data analytics with scalable, user-focused applications.”
Blåsmo Development
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We focus on creating innovative websites and web applications utilizing React and Next.js, alongside TypeScript and Tailwind/SCSS. With a strong dedication to keeping up with the latest technology, we guarantee that our solutions meet the highest standards and are designed for scalability. Our enthu
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Trondheim, No
Services Provided+1 Services
30% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
30% Product UX Strategy
AI Summary
“Blåsmo Development specializes in innovative, scalable web applications using React, Next.js, TypeScript, and modern styles, delivering high-quality, future-focused solutions for Norwegian businesses.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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