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

QM Logics
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Enabling Worldwide Businesses with Flexible AI-Powered Software Solutions | Shaping the Future of Smart Automation
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
9% Custom Web Application Development
6% API Development & Integration
3% E-Commerce Development
3% Legacy System Modernization
AI Summary
“QM Logics develops flexible AI-powered software solutions, offering smart automation technologies that enable businesses worldwide to enhance operational efficiency and future-proof their processes.”
Allisoft
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Allisoft is a prominent IT solutions provider located in Tanzania, focused on facilitating digital transformation. The company equips businesses and individuals with cutting-edge technology services. Recognized as one of the top IT and software firms in Tanzania, Allisoft delivers innovative IT solu
Highlights
10-49
Employees
Services Provided+23 Services
6% Mobile App Development (iOS & Android)
4% API Development & Integration
5% Backend Development
8% Custom Web Application Development
AI Summary
“Allisoft is a leading Tanzanian IT solutions provider delivering innovative digital transformation services, including website development, applications, and diverse technology solutions to businesses and individuals.”
ICraftAds Digital Marketing Agency
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ICraftAds is a top marketing agency in India specializing in digital advertising, branding solutions, and tailored IT services. Founded by experienced professionals from a global IT firm who ventured into entrepreneurship, the company operates both in India and internationally, creating a significan
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+34 Services
2% Search Engine Optimization (SEO)
1% Ecommerce Marketing
1% Email Marketing & Automation
1% Video Marketing Strategy
AI Summary
“ICraftAds is a professional Indian marketing agency offering digital advertising, branding, and IT solutions with over 15 years' expertise, serving diverse clients globally to achieve business goals.”
Bytezenith
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Bytezenith is a software development firm that has been creating innovative products and offering consulting services to small and medium-sized enterprises (SMEs) and large corporations since 2022. We focus on delivering finished products rather than selling hours of work.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+10 Services
5% API Development & Integration
12% Custom Web Application Development
7% Mobile App Development (iOS & Android)
3% E-Commerce Development
AI Summary
“Bytezenith is a software development firm established in 2022, delivering innovative products and consulting services to SMEs and large corporations with a focus on finished solutions.”
Ultimate Software Development IT Consulting
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Consulting and development services in software and artificial intelligence, encompassing application development, generative AI, big data, cloud solutions, ERP, CRM, enterprise and custom software, complex software, cybersecurity, system integration, implementation, transformation, outsourcing, and
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+34 Services
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
4% API Development & Integration
3% E-Commerce Development
AI Summary
“Ultimate Software Development IT Consulting offers comprehensive software and AI consulting, including application development, big data, cloud, ERP, CRM, cybersecurity, integration, and automation services.”
Katharos Techie
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**Katharos Techie – Transforming Ideas into Scalable Digital Solutions** At Katharos Techie, we bring your most ambitious business concepts to fruition through innovative, scalable, and effective digital solutions. As a leading software and AI development firm located in India, we excel at transfor
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
8% Mobile App Development (iOS & Android)
8% Custom Web Application Development
5% API Development & Integration
4% SaaS Product Development
AI Summary
“Katharos Techie delivers innovative, scalable digital solutions including software, AI development, UI/UX design, and staff augmentation, empowering businesses across the USA, UAE, and India to innovate and grow.”
BOMBAYDC
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BOMBAYDC – A premier UI/UX design, web design, and web development firm located in Mumbai, India. BOMBAYDC specializes in UI/UX design, along with web and eCommerce development, and app development tailored for startups, large enterprises, and global brands. With over a decade of experience, we crea
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+16 Services
6% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% E-Commerce Development
3% API Development & Integration
AI Summary
“BOMBAYDC is a Mumbai-based firm specializing in UI/UX, web, eCommerce, and app development, delivering user-centric digital solutions across diverse industries with proven expertise.”
Quanteon Solutions
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At Quanteon Solutions, we believe that technology should go beyond mere presence—it should create meaningful impact, open doors to new opportunities, and propel business growth. Since 2015, we have been assisting companies in sectors such as Healthcare, FinTech, E-Commerce, Insurance, and Sports in
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+13 Services
8% Mobile App Development (iOS & Android)
5% E-Commerce Development
2% Legacy System Modernization
4% API Development & Integration
AI Summary
“Quanteon Solutions delivers secure, scalable technology services across industries including Healthcare and FinTech, specializing in custom applications, AI, cloud, and data analytics to drive business growth.”
G8 Brooks FZE
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G8 Brooks Technology is a software development firm located in the UAE that focuses on enterprise SaaS platforms, API architecture, and comprehensive web development. We cater to clients in Africa, the UAE, and around the world, boasting extensive knowledge in multi-tenant systems, cloud infrastruct
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+14 Services
7% Custom Web Application Development
8% SaaS Product Development
4% Legacy System Modernization
5% Frontend Development
AI Summary
“G8 Brooks FZE is a UAE-based software development firm specializing in enterprise SaaS, API architecture, cloud infrastructure, and AI-driven solutions across diverse sectors globally.”
V
veez technologies
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Situated at the crossroads of contemporary web frameworks and top-tier e-commerce, our company serves as your reliable collaborator in developing web solutions that promote success. We focus on e-commerce development and web applications powered by large language models (LLMs), merging creativity wi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
6% Custom Web Application Development
4% API Development & Integration
2% Mobile App Development (iOS & Android)
8% E-Commerce Development
AI Summary
“Veez Technologies specializes in innovative e-commerce and web application development using modern frameworks and large language models, enhancing digital presence and online success for businesses.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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