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

Meet Company
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WHERE CREATIVITY COLLIDES WITH TECHNOLOGY. "Introducing Software Company, where technology and strategy intersect. We are a fresh and compact start-up focused on enhancing efficiency and motivating users with our groundbreaking products."
Highlights
2-9
Employees
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
10% QA & Software Testing
AI Summary
“Meet Company is an innovative startup combining technology and strategy to deliver efficient, user-focused software solutions that enhance productivity and engagement across diverse applications.”
Quang Trung Software Development Co,.Ltd
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I. Introduction: Since 2012, QT Software in Ho Chi Minh City, Vietnam, has been a reliable provider of innovative software and outsourcing services. With over 12 years of experience, we create tailored software, mobile applications, APIs, and microservices utilizing the latest technologies to enhanc
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ho Chi Minh City, Vn
Services Provided
23% Custom Web Application Development
17% Mobile App Development (iOS & Android)
10% API Development & Integration
50% DevOps Engineering
AI Summary
“Quang Trung Software Development Co., Ltd. delivers innovative software, mobile applications, APIs, and microservices with over 12 years' experience, enhancing global business efficiency through advanced technology.”
Excelorithm
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Excelorithm is a premier provider of on-demand software development services. Our skilled team of developers is committed to delivering top-notch, tailor-made software solutions that address the specific requirements of our clients. Whether you're looking to create a new application, enhance an exis
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
20% API Development & Integration
15% Mobile App Development (iOS & Android)
15% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“Excelorithm specializes in tailored, on-demand software development services, enhancing business efficiency and growth through customized applications, maintenance, and innovative technological solutions.”
Synergyatech
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Synergyatech es una empresa dedicada al desarrollo de software que fue establecida en 2020 y se especializa en la creación de plataformas tecnológicas personalizadas, sistemas web empresariales y soluciones innovadoras que combinan software y hardware. Poseemos experiencia en el diseño de sistemas a
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Cucuta, Norte De Santander, Co
Services Provided+2 Services
23% Custom Web Application Development
5% QA & Software Testing
3% E-Commerce Development
2% Blockchain & Web3 Development
AI Summary
“Synergyatech, founded in 2020, develops customized tech platforms and integrated software-hardware solutions, specializing in complex systems, process optimization, and international client collaboration across diverse sectors.”
Syntora.Tech
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At Syntora.tech, we provide high-performance blockchain solutions for DeFi, trading infrastructure, NFTs, and staking protocols. Our experienced team has a successful history with over 50 projects, focusing on EVM chains, Solana, and prominent DeFi protocols. From low-latency trading bots to cross-c
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Odesa, Odesa, Ua
Services Provided
20% Custom Web Application Development
25% Backend Development
15% API Development & Integration
40% Blockchain & Web3 Development
AI Summary
“Syntora.Tech delivers comprehensive, scalable blockchain solutions across DeFi, NFTs, and trading infrastructure, leveraging multi-chain expertise and full-stack development for secure, enterprise-grade Web3 applications.”
DevHired
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DevHired serves as a backend engineering partner for agencies and product teams developing scalable systems. We specialize in designing and implementing robust SaaS architectures, intricate integrations, and secure infrastructure, particularly when projects surpass the capabilities of plugin-based p
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Mykolaiv, Ua
Services Provided+4 Services
10% Custom Web Application Development
14% API Development & Integration
10% SaaS Product Development
3% AI Strategy & Roadmap Consulting
AI Summary
“DevHired specializes in scalable backend engineering, delivering robust SaaS architectures, complex integrations, AI-powered automation, and secure cloud infrastructure for agencies and SaaS teams.”
Klint Solutions
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Klint Solutions SpA is a technology and systems development company based in Chile that focuses on creating structured, scalable digital solutions. We excel in turning complex operational problems into clear, modular systems that organizations can effectively utilize and expand. Our methodology-driv
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Santiago, Santiago Metropolitan Region, Cl
Services Provided+4 Services
20% Custom Web Application Development
14% API Development & Integration
3% Cloud Consulting & SI
3% IT Staff Augmentation
AI Summary
“Klint Solutions SpA develops structured, scalable digital systems across industries, emphasizing clear architecture, modular design, and operational control to ensure long-term sustainability and growth.”
Data Pulse Technologies
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At Data Pulse Technologies, we provide a variety of customized services designed to fulfill your business requirements. This includes web development and e-commerce site creation to boost your online visibility. Our knowledge in DevOps and solution architecture optimizes your operations, and our dat
Highlights
10-49
Employees
Tower, Cork, Ie
Services Provided+1 Services
17% API Development & Integration
12% E-Commerce Development
5% QA & Software Testing
33% Operational Process Consulting
AI Summary
“Data Pulse Technologies offers tailored web development, e-commerce, DevOps, solution architecture, data analytics, deep learning APIs, custom APIs, tech consulting, and payment integration services to optimize business operations.”
Maverin
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We focus on IT consulting and talent solutions, offering highly skilled IT consultants to assist organizations in managing intricate technology, business, and talent issues. Whether working with public sector projects or private companies, we provide expert solutions that promote transformation and
Highlights
10-49
Employees
Ottawa, Ontario, Ca
Services Provided+2 Services
18% API Development & Integration
15% ERP & CRM Development
23% Other IT Consulting and SI
7% ERP Consulting and SI
AI Summary
“Maverin specializes in IT consulting and talent solutions, supplying expert IT consultants to help organizations navigate complex technology, business, and talent challenges across sectors, fostering innovation.”
Matiyas Solutions
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Matiyas Solutions is an ERP software provider dedicated to assisting small and mid-sized enterprises in achieving digital transformation through automation, process enhancement, and scalable enterprise solutions. As a seasoned ERPNext service provider, we offer comprehensive services, including busi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Ahmedabad, Gujarat, In
Services Provided+3 Services
14% ERP Consulting and SI
10% Cloud Consulting & SI
7% CRM Consulting and SI
6% ECM Consulting and SI
AI Summary
“Matiyas Solutions delivers tailored ERPNext software and consulting to SMEs, enabling digital transformation through automation, integration, and scalable solutions across diverse industries.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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