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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8,490 Companies

List of the Best API Development & Integration Agencies

Scaefy
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Scaefy is a niche digital agency located in Istanbul, focusing on customized WordPress development, SEO enhancement, and web solutions geared towards performance. Established in 2023, our enthusiastic team of developers and designers empowers businesses to expand their digital footprint using advanc
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Istanbul, Istanbul, Tr
Services Provided+1 Services
15% Custom Web Application Development
20% API Development & Integration
10% Backend Development
5% CMS Development & Customization
AI Summary
“Scaefy, a 2023 Istanbul-based digital agency, specializes in custom WordPress development, SEO optimization, data migration, AI integration, Laravel solutions, and managed hosting to enhance digital presence.”
Triagons
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Triagons is focused on innovation and creates meaningful digital products using highly skilled professionals. By combining design and value, we enhance our clients' ideas in the digital landscape. Our areas of expertise include:
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Culiacan Rosales, Sinaloa, Mx
Services Provided
40% Mobile App Development (iOS & Android)
40% Custom Web Application Development
20% API Development & Integration
AI Summary
“Triagons specializes in innovative digital product development, leveraging expert professionals to merge design and value, enhancing clients' ideas across diverse digital landscapes.”
NextLine Technologies
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NextLine Technologies is a forward-thinking IT firm that offers high-quality tech solutions. Our goal is to enable businesses by equipping them with the latest technology.
Highlights
10-49
Employees
Sheridan, Wyoming, Us
Services Provided+1 Services
25% API Development & Integration
15% Managed IT Services
10% Cybersecurity Assessments & Hardening
25% Search Engine Optimization (SEO)
AI Summary
“NextLine Technologies is an innovative IT company providing advanced technology solutions that empower businesses with cutting-edge tools to enhance their operations and growth.”
scifamek
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A company that focuses on bespoke software development and supplying skilled developers to businesses or software teams.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Manizales, Caldas, Co
Services Provided
25% API Development & Integration
50% Custom Web Application Development
25% Mobile App Development (iOS & Android)
AI Summary
“Scifamek specializes in bespoke software development and provides skilled developers to businesses, supporting diverse software teams with tailored solutions and expert staffing.”
Nanodex
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Do you have a concept you want to launch? We are a group of Rails enthusiasts dedicated to creating new projects and delivering them to your customers efficiently and effectively. The top-notch, user-ready MVPs we develop are built to scale using industry best practices, along with ongoing support a
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Custom Web Application Development
25% API Development & Integration
25% SaaS Product Development
AI Summary
“Nanodex specializes in developing scalable, user-ready web applications including SaaS, marketplaces, chatbots, and lead generation sites using Ruby on Rails and modern technologies.”
Oves Enterprise
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Oves is seeking global growth partnerships. Our experienced consultants prioritize utilizing design, data, and engineering to achieve your business objectives. We primarily work with start-ups (including those at the MVP stage) and scale-ups that require quicker time-to-market solutions.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Cluj-Napoca, Cluj, Ro
Services Provided
10% E-Commerce Development
15% API Development & Integration
25% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“Oves Enterprise, a Romania-based technology firm, specializes in custom software development, e-commerce solutions, and IT staff augmentation, helping startups and scale-ups accelerate market readiness globally.”
Semantic Applications GmbH & Co. KG
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Semantic Applications GmbH & Co. KG is an agile IT services and software development firm that specializes in the semantic web, customized IT solutions, and consulting services designed to cater to the specific requirements of our clients. Established in Germany in 2011 and expanding to Croatia in 2
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Fulda, De
Services Provided
25% Custom Web Application Development
10% QA & Software Testing
15% API Development & Integration
50% DevOps Engineering
AI Summary
“Semantic Applications GmbH & Co. KG delivers tailored IT and semantic web solutions across multiple sectors, emphasizing client-focused consultancy, quality outcomes, and long-term strategic partnerships.”
Myware Pte Ltd
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Myware Pte Ltd is a prominent provider of technology solutions, focused on delivering tailored services to meet the specific requirements of our clients. We excel in areas such as website development, custom software creation, AI modeling, machine learning, Google advertising, and financial advisory
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Singapore, Singapore, Sg
Services Provided
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
15% API Development & Integration
50% Social Media Marketing
AI Summary
“Myware Pte Ltd specializes in tailored technology solutions including website development, custom software, AI, machine learning, digital advertising, and financial advisory, supporting diverse business success.”
BlockApex
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BlockApex is transforming the field of blockchain security and development. As a top-tier blockchain consulting firm, we provide cutting-edge solutions that empower startups, large enterprises, and Web3 innovators to develop confidently. Since our establishment in 2021, we have led the way in blockc
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Karachi, Sindh, Pk
Services Provided+2 Services
8% Mobile App Development (iOS & Android)
25% Custom Web Application Development
17% API Development & Integration
15% Custom AI Chatbot Development
AI Summary
“BlockApex is a leading blockchain consulting firm offering secure smart contract development, thorough security audits, and comprehensive Web3 solutions, empowering clients to build scalable, innovative decentralized systems.”
WPWeb Infotech
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WPWeb Infotech is a prominent company specializing in Web and Mobile App development, providing exceptional IT solutions for startups, as well as small to medium and large businesses worldwide. As a reliable partner in web development, WPWeb Infotech is the preferred choice for outsourcing developer
Highlights
$25,000+
Min Project Size
< $25/hr
Avg Hourly Rate
250-999
Employees
Ahmedabad, Gujarat, In
Services Provided
60% Custom Web Application Development
30% E-Commerce Development
10% API Development & Integration
AI Summary
“WPWeb Infotech is a global IT firm specializing in web and mobile app development, offering expert solutions and over 100 WordPress products for diverse industries and clients.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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