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

Navigo Smart Technologies
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Founded in the UK in 2023, Navigo Smart Technologies Limited is dedicated to utilizing GIS technology for digitizing venues and converting data into actionable insights. Our primary services encompass Indoor and Outdoor Mapping, Navigation for Large Areas, and Asset Tracking solutions specifically d
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% API Development & Integration
30% Custom Web Application Development
50% Mobile App Development (iOS & Android)
AI Summary
“Navigo Smart Technologies, founded in 2023 in the UK, specializes in GIS-based indoor/outdoor mapping, navigation, asset tracking, and app development to enhance venue digitization and client workflows.”
aCodeme
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Codeme is your complete solution for turning your digital aspirations into real accomplishments. We'll assist you throughout the entire process, from initial idea to launch, providing skilled development and steadfast support.
Highlights
2-9
Employees
Services Provided
30% Mobile App Development (iOS & Android)
50% Custom Web Application Development
20% API Development & Integration
AI Summary
“aCodeme offers comprehensive digital development services, guiding clients from initial concepts through to launch with expert solutions and ongoing support to realize their goals.”
Striver Technosoft LLP
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**Striver Technosoft - Empowering Your Digital Success Journey** Welcome to Striver Technosoft, your reliable partner in navigating the complex world of IT solutions. At Striver, we go beyond providing services; we create customized technology solutions aimed at propelling your business towards gre
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
30% Mobile App Development (iOS & Android)
50% Custom Web Application Development
20% API Development & Integration
AI Summary
“Striver Technosoft delivers expert IT solutions including software development, web design, cloud computing, and digital marketing, empowering businesses to achieve growth through innovation and client-focused services.”
Intent Solutions Group
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Intent Solutions Group is a highly efficient software development partner with over a decade of experience in providing customized solutions that meet specific business needs. As a reliable long-term collaborator for both established businesses and startups, we prioritize quick value delivery while
Highlights
50-249
Employees
Services Provided
40% Custom Web Application Development
25% Backend Development
20% Frontend Development
15% API Development & Integration
AI Summary
“Intent Solutions Group specializes in Custom Software Development, leveraging a diverse tech stack and global engineering talent to deliver tailored web applications, backend services, and API integrations that address unique business needs efficiently.”
Maheshwari Innovative IT Services LLP
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Maheshwari Innovative IT Services LLP provides top-notch QA and testing services promptly to its clients. Since our founding in 2022, we have concentrated on delivering outstanding IT solutions to international customers, utilizing cutting-edge technologies on a global scale. Our primary objective i
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Bhartiya, Uttar Pradesh, In
Services Provided
10% Mobile App Development (iOS & Android)
80% QA & Software Testing
10% API Development & Integration
AI Summary
“Maheshwari Innovative IT Services LLP delivers expert QA and IT solutions globally, emphasizing quality, reliability, and client growth since 2022 through skilled, value-driven professionals.”
Bytesved Technologies LLP
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Bytesved provides software development services across various technology platforms to enhance customer experiences and give your software products a competitive advantage. Our offerings include: At Bytesved Technologies, we offer consulting services to assist clients in making well-informed decisio
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Gandhinagar, Gujarat, In
Services Provided+2 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
15% API Development & Integration
10% E-Commerce Development
AI Summary
“Bytesved Technologies LLP delivers comprehensive software development, consulting, and IT support services across diverse platforms, enabling clients to enhance products and access skilled emerging talent.”
Zorix Lab
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Engineering Without Interruption. Located in the center of India’s technology hub, Zorix Lab offers a strategic time-zone benefit for businesses in the West. We facilitate a continuous 24-hour development cycle that speeds up your product's launch. While your teams in New York or London take a break
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
25% Custom Web Application Development
20% API Development & Integration
30% Backend Development
20% Frontend Development
AI Summary
“Zorix Lab, based in India’s tech hub, offers 24-hour development with expertise in scalable backend and frontend solutions, accelerating global product launches for enterprises and startups.”
D
Datadigs
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We specialize in integration services that help you connect your systems and processes effectively. Our offerings include B2B, B2C, and A2A integration through APIs, designed to enhance your workflows. Our experienced integration specialists assist in developing strategies, identifying integration p
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Apex, North Carolina, Us
Services Provided+2 Services
10% Mobile App Development (iOS & Android)
15% Custom Web Application Development
25% API Development & Integration
25% BI & Big Data Consulting & SI
AI Summary
“Datadigs offers expert integration services connecting diverse systems via APIs, enabling seamless data synchronization, streamlined workflows, and enhanced operational efficiency through tailored solutions and consultative collaboration.”
Analytics Engines
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We specialize in AI Strategy, Data Science, Data Engineering, and Delivery Enablement. Our team excels not only in developing advanced technology but also in grasping business needs. Our expertise extends beyond AI and data; we evaluate, advise, and help build technological capabilities for you, you
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Belfast, Northern Ireland, Gb
Services Provided+5 Services
8% LLM Integration & Prompt Engineering
7% Generative AI
7% Machine Learning Model Development
5% AI Strategy & Roadmap Consulting
AI Summary
“Analytics Engines provides expert AI strategy, data science, and engineering services, combining deep technology and business insight to develop innovative, actionable solutions across diverse challenges.”
Heka Software
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HEKA Software was established in London with the goal of offering European businesses fast-moving engineering teams that appear local while having the ability to scale globally. With more than four years of successful operations in Türkiye since 2021, we integrate a UK-based corporate headquarters w
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+3 Services
10% AI Strategy & Roadmap Consulting
13% LLM Integration & Prompt Engineering
15% Custom AI Chatbot Development
12% Machine Learning Model Development
AI Summary
“Heka Software offers scalable, local-feeling engineering teams with UK headquarters and Ankara tech center, blending legal security, proximity, and top technical expertise for European businesses.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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