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

Uvicraft
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Uvicraft empowers businesses of all sizes through our advanced software solutions. We focus on creating, innovating, and enhancing digital products, prioritizing user experience and leveraging emerging technologies. Our clients have transformed the travel sector with inventive booking platforms, rev
Highlights
2-9
Employees
Services Provided
45% Custom Web Application Development
15% Mobile App Development (iOS & Android)
25% API Development & Integration
15% E-Commerce Development
AI Summary
“Uvicraft delivers innovative software solutions across industries, specializing in custom development, UX/UI design, cloud migration, and AI integration to realize diverse digital goals.”
Clymin
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At Clymin, we simplify data to make it more accessible and actionable. Our web scraping and data extraction services transform complex information into straightforward insights, empowering your business to make better decisions. Regardless of whether you're in e-commerce, finance, or another sector,
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
San Francisco, California, Us
Services Provided+4 Services
15% AI Strategy & Roadmap Consulting
13% LLM Integration & Prompt Engineering
10% Generative AI
8% Custom AI Chatbot Development
AI Summary
“Clymin offers tailored web scraping and data extraction services, transforming complex information into actionable insights that empower businesses across sectors to make informed decisions and grow.”
Solveetech Solution Pvt Ltd
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Founded in 2019, SolveeTech is committed to fostering innovation and providing exceptional services in education management, property services, consultancy, and healthcare systems. We offer outsourcing services to clients across Australia, Canada, Europe, the Middle East, and the USA. Our aim is to
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Kathmandu, Bagmati, Np
Services Provided
40% Custom Web Application Development
25% API Development & Integration
15% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“Founded in 2019, SolveeTech delivers innovative software solutions and outsourcing services across education, property, consultancy, and healthcare sectors to global clients, enabling digital transformation.”
BOVO Digital
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Vos outils ne s'intègrent pas ? Vous souhaitez une application personnalisée pour dynamiser votre entreprise ? Je suis William, et en deux ans, j'ai amélioré les opérations de plus de 100 dirigeants et entrepreneurs. Mon atout ? L'automatisation intelligente grâce à l'IA et le développement No-Code
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Services Provided
28% API Development & Integration
22% Mobile App Development (iOS & Android)
50% AI Agent & Multi-Agent System Development
AI Summary
“BOVO Digital specializes in intelligent automation and custom no-code web and mobile applications, enhancing operational efficiency and accelerating growth for over 100 businesses via AI integration.”
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Mindful payments
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At Mindful Payments, we specialize in payment systems. Whether you are transitioning from an outdated infrastructure, need to adopt the latest standards in contactless payments, or require integration of a payment gateway into your system, we are here to assist you in successfully completing your pr
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Madrid, Madrid, Es
Services Provided
50% Custom Web Application Development
20% Mobile App Development (iOS & Android)
25% API Development & Integration
5% E-Commerce Development
AI Summary
“Mindful Payments delivers comprehensive payment system solutions, supporting transitions from legacy infrastructure, implementing modern contactless standards, and integrating payment gateways to ensure project success.”
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ItBuilders
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We create and assist in the development of technology solutions from conception to implementation. Our services include designing websites, mobile applications, CRM systems, internal tools, and automation processes. We connect various products with one another and with external systems. We also esta
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided
30% API Development & Integration
20% Mobile App Development (iOS & Android)
20% UX Research & Usability Testing
30% Web App UI Design
AI Summary
“ItBuilders develops and supports comprehensive technology solutions including websites, mobile apps, CRM, internal tools, automation, and call centers, ensuring scalable and efficient digital product delivery.”
Delta Software
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Delta Software, located in Bucharest, is a software development firm that specializes in affordable outsourcing solutions. We link businesses with premier developers from Eastern Europe, providing high-quality, scalable, and sustainable code. Our client-centric strategy guarantees quick delivery whi
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% Mobile App Development (iOS & Android)
50% Custom Web Application Development
25% API Development & Integration
AI Summary
“Delta Software, based in Bucharest, offers affordable outsourcing by connecting businesses with top Eastern European developers, delivering scalable, high-quality software solutions that reduce costs and improve profitability.”
VIVIFY DIGITAL
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We can collaborate with you and provide skilled personnel for your short or long-term projects. Our dedicated teams possess diverse expertise. Our goal is to streamline business operations by delivering innovative digital solutions that change how tasks are organized and carried out through the deve
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Aveiro, Pt
Services Provided+1 Services
23% API Development & Integration
20% Custom Web Application Development
7% Mobile App Development (iOS & Android)
30% UX Audit & Heuristic Evaluation
AI Summary
“Vivify Digital provides skilled teams delivering innovative, modular digital solutions that integrate with major ERP and MES systems, enhancing and streamlining business operations effectively.”
Graffitecs
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Graffitecs is a global IT solutions firm based in Dubai, bringing together specialists from various countries. We combine advanced technology with artistic innovation to create exceptional solutions. Our multicultural team includes members from the UAE, Jordan, Egypt, India, Pakistan, Italy, the USA
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+1 Services
20% Mobile App Development (iOS & Android)
20% API Development & Integration
20% E-Commerce Development
15% QA & Software Testing
AI Summary
“Graffitecs is a Dubai-based global IT firm uniting diverse specialists to deliver innovative, cloud-powered technology and creative solutions through multicultural collaboration across UAE, Pakistan, and Jordan offices.”
STWIN SPARX PVT LTD
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Established in 2019, STWIN SPARX PVT LTD is a comprehensive IT and BPO solutions provider committed to fostering the growth of startups and small to medium-sized enterprises throughout India. With a strong expertise in both technology and business, we focus on creating scalable digital solutions tha
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Udaipur, Rajasthan, In
Services Provided+1 Services
23% API Development & Integration
10% E-Commerce Development
18% Mobile App Development (iOS & Android)
32% Web App UI Design
AI Summary
“STWIN SPARX PVT LTD, established in 2019, offers comprehensive IT and BPO services including digital solutions and business process outsourcing to support startups and SMEs across India.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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