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

Valletta.Software: AI-Care
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Valletta.Software is a software engineering company located in Malta, having successfully completed over 700 projects for clients in Europe, Israel, and North America. We operate under EU regulations, accommodating US and European business hours, and communicate solely in English. We offer fixed-pri
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
San Giljan, Mt
Services Provided+4 Services
13% Custom Web Application Development
5% Mobile App Development (iOS & Android)
7% DevOps Engineering
15% API Development & Integration
AI Summary
“Valletta.Software: AI-Care is a Malta-based software engineering firm delivering AI-enabled custom web, mobile, and automation solutions, with expertise in project recovery, AI agent integration, and staff augmentation under fixed-price contracts.”
Code Elevator
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Code Elevator is an innovative software development firm at the forefront of technological advancements. We specialize in Web3 Development, Cryptocurrency Solutions, Crypto Exchange Creation, Blockchain Solutions, NFT Marketplace Development, and MLM Software Creation, expanding the horizons of digi
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Surat, Gujarat, In
Services Provided
70% Blockchain & Web3 Development
10% API Development & Integration
20% Custom Web Application Development
AI Summary
“Code Elevator specializes in innovative software solutions across Web3, blockchain, cryptocurrency, NFT marketplaces, crypto exchanges, and MLM software, driving secure and scalable digital transformation for businesses.”
Devminds Studio
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Welcome to DevMinds Studio, the leading provider of customized software solutions. With seven years of global experience, we specialize in creating personalized web and mobile applications designed specifically for you. Our skilled team of developers is dedicated to turning your concepts into realit
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided
40% Custom Web Application Development
35% Mobile App Development (iOS & Android)
15% API Development & Integration
10% E-Commerce Development
AI Summary
“Devminds Studio delivers customized web and mobile software solutions globally, leveraging seven years of expertise to support startups and established businesses in realizing their digital visions.”
MiSiV
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What We Offer Web & Full-Stack Development We create responsive, scalable, and maintainable web applications that encompass both front-end interfaces and robust back-end systems. Our technology stack includes a variety of tools, primarily JavaScript (React, Node.js) and Python, along with modern
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% Machine Learning Model Development
20% API Development & Integration
20% Software Development Services
20% Engineering Services
AI Summary
“MiSiV excels in Software Development, delivering scalable custom web applications and seamless API integrations using modern technology stacks like JavaScript and Python, tailored for SMEs seeking robust digital tools.”
Hire FullStacks
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Established in 2019 and based in New Delhi, India, Hire Full Stacks leverages its robust research and development background and innovative capabilities. The company is now concentrating on harnessing emerging and disruptive technologies such as mobility, big data, cloud computing, and analytics to
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Atlanta, Georgia, Us
Services Provided+1 Services
20% API Development & Integration
20% QA & Software Testing
20% Software Development Services
20% E-Commerce Development
AI Summary
“Hire FullStacks demonstrates strong capabilities in Software Development through API Development, Custom Web Applications, Mobile Apps, E-Commerce platforms, and Application Testing. Their diverse technical services and focus make them an excellent fit in this category.”
softme
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At Sofme, we create personalized software aimed at fostering business growth. Whether it's through automation or customized applications, we deliver intelligent and effective solutions to address genuine business challenges. We go beyond mere development; we are your technology partner for sustained
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Almabra, Es
Services Provided
20% API Development & Integration
30% Custom Web Application Development
25% Ecommerce Marketing
25% Social Media Marketing
AI Summary
“Softme provides personalized software solutions, combining automation and custom applications to support business growth and address real challenges as a trusted technology partner.”
LinxHQ Pte Ltd
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Established in 2008, LinxHQ offers software outsourcing services to our clients. We assist them throughout the entire process, from gathering requirements to designing, developing, deploying, and maintaining their web-based and native mobile applications. You can view our portfolio at this link: htt
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Hanoi, Vn
Services Provided+1 Services
35% Mobile App Development (iOS & Android)
25% Custom Web Application Development
15% API Development & Integration
15% Backend Development
AI Summary
“Founded in 2008, LinxHQ provides comprehensive software outsourcing services, specializing in developing, deploying, and maintaining web-based and native mobile applications for diverse clients.”
Steadfast Collective
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As official Laravel partners, we create web applications that are utilized by millions daily. Our team consists of trusted Laravel developers who are dedicated to crafting enduring digital products and web applications. We specialize in PHP, Laravel, and Vue.js. According to Francis Doyle from the N
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+1 Services
35% Custom Web Application Development
25% Backend Development
15% Frontend Development
15% API Development & Integration
AI Summary
“Steadfast Collective, official Laravel partners, specializes in developing robust web applications using PHP, Laravel, and Vue.js, delivering reliable, business-critical digital solutions.”
Volare Software
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Volare Software is a custom software consultancy for enterprises and a Microsoft Partner, with a focus on Microsoft .NET and Azure solutions. Established in 2009 and based in the Netherlands since 2021, we work remotely on projects for enterprise clients in the United States and Europe. Our expertis
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Hilversum, North Holland, Nl
Services Provided
20% Backend Development
15% API Development & Integration
15% Custom Web Application Development
50% DevOps Engineering
AI Summary
“Volare Software is a Netherlands-based consultancy specializing in Microsoft .NET and Azure solutions for enterprises, delivering secure, maintainable software and cloud services via direct expert collaboration.”
DevDynamics
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Dev Dynamics is a forward-thinking startup focused on the Banking, Financial Services, and Insurance industries. Dedicated to advancing technology and finance, we provide tailored and off-the-shelf digital solutions that enable financial institutions, businesses, and individuals to excel in the digi
Highlights
$75,000+
Min Project Size
10-49
Employees
Dubai, Dubayy, Ae
Services Provided+1 Services
20% Custom Web Application Development
13% Mobile App Development (iOS & Android)
12% API Development & Integration
5% QA & Software Testing
AI Summary
“DevDynamics is an innovative startup delivering tailored digital solutions for banking, financial services, and insurance sectors, helping clients succeed through customized technology ecosystems aligned with their goals.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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