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

DevHub Masters LLC
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Located in Orlando, FL, Devhub Master LLC connects exceptional technical skills with affordable solutions. Our core team consists of senior developers with over a decade of experience, offering top-notch software engineering and staffing services within the same time zone as our US clients. This set
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Orlando, Florida, Us
Services Provided
20% API Development & Integration
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
AI Summary
“Devhub Master LLC in Orlando, FL provides experienced software engineering and staffing services, delivering cost-effective, high-quality technical solutions aligned with US client time zones.”
Caemcore
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We quickly deliver MVPs for startups and SaaS entrepreneurs. There's no corporate nonsense, no wasting budgets, and no lengthy discovery phases. Instead, we provide functional software, well-structured architecture, and ready-to-deploy products within 4 to 12 weeks.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided
50% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
AI Summary
“Caemcore specializes in rapidly delivering functional MVPs and ready-to-deploy software for startups and SaaS entrepreneurs, emphasizing efficient architecture without unnecessary delays or costs.”
Wise Beaver
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Similar to actual beavers, we thoroughly analyze the landscape before commencing construction. This involves gaining a comprehensive understanding of your industry, business, and the challenges you face. We have established a strong presence in Finance and Health & Fitness by creating .NET solutions
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Novi Sad, Rs
Services Provided
35% Custom Web Application Development
15% API Development & Integration
25% IT Staff Augmentation
25% Cloud Consulting & SI
AI Summary
“Wise Beaver delivers robust, tailored .NET software solutions across industries, notably finance and health, combining thorough analysis with proven client satisfaction and readiness for new challenges.”
Software Angels
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Your specialized IT firm for cutting-edge innovation and sophisticated digital transformation solutions. Here’s how one of our clients described their experience with us: "Our collaboration with Software Angels to create a suite of web applications has significantly digitized our operations. The a
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Pinhal Novo, Pt
Services Provided
20% API Development & Integration
25% Backend Development
40% Custom Web Application Development
15% Mobile App Development (iOS & Android)
AI Summary
“Software Angels specializes in innovative IT and digital transformation solutions, delivering quality web applications rapidly that streamline business processes and enhance operational efficiency.”
Indovate Technologies Pvt Ltd
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Indovate Technologies provides cutting-edge and dependable digital solutions that enable businesses to succeed in an interconnected environment. Our expertise lies in website development, mobile app development, ERP solutions, software development and troubleshooting, as well as AI model training. P
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Latur, Maharashtra, In
Services Provided
40% Custom Web Application Development
20% API Development & Integration
15% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Indovate Technologies Pvt Ltd offers comprehensive digital solutions including web, mobile, ERP, software development, and AI model training, emphasizing quality, scalability, and sustainable client growth.”
.wrk
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Since our founding in 2011, our team has successfully assisted more than 200 clients in transforming their concepts into tangible outcomes through high-quality development solutions. With a workforce of over 50 skilled professionals, primarily in technical roles, we operate from three offices worldw
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+1 Services
30% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% Backend Development
AI Summary
“.wrk. is a global IT firm specializing in web and mobile development, customized solutions, consulting, and dedicated teams, serving over 200 clients since 2011 with 50+ experts.”
Saudisoft
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Saudisoft is a prominent provider of IT, translation, and localization services, delivering integrated solutions across various industries through three main business lines: 1. **ICT Solutions Division**: Focused on providing customized solutions that address the specific challenges faced by our cl
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Riyadh, Riyadh, Sa
Services Provided
50% Custom Web Application Development
30% Backend Development
20% API Development & Integration
AI Summary
“Saudisoft, established in 1983, offers integrated IT, translation, localization, and distribution services across multiple industries, operating in the Middle East with a global client base.”
Poole Software Limited
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We offer tailored software development and support, in addition to custom web development services. Our expertise includes API integrations and mobile app development.
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Poole, England, Gb
Services Provided
50% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
AI Summary
“Poole Software Limited specializes in bespoke software development, delivering custom web and mobile applications, API integrations, and ongoing software support tailored to client needs.”
Freeterium LLC
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We create web and mobile applications, assist our clients in maintaining their codebases, and develop online services. Our team boasts significant experience, having successfully completed over 100 projects collectively. Some members bring over 20 years of industry experience, while others are enthu
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% API Development & Integration
30% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% Backend Development
AI Summary
“Freeterium LLC is a small, experienced team specializing in web and mobile applications, codebase maintenance, and online services, delivering quality solutions through strong client collaboration.”
Namazu Studios
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At Namazu, we handle all types of software projects efficiently and with adaptability, designed for growth. Our key advantage is Elements, a robust backend tool that speeds up development, reduces expenses, and allows for quicker market delivery. Regardless of whether you’re creating an app, a platf
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
San Diego, California, Us
Services Provided
20% API Development & Integration
50% Custom Web Application Development
30% Mobile App Development (iOS & Android)
AI Summary
“Namazu Studios delivers versatile software solutions using their proprietary Elements backend tool, enabling efficient, cost-effective development and faster market delivery for diverse projects.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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