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

YourCoder
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YourCoder is an agency specializing in full-stack web development and cybersecurity, committed to creating high-performance, secure, and scalable digital solutions. We focus on custom website creation, web applications, admin dashboards, and API integrations, utilizing contemporary technologies such
Highlights
2-9
Employees
Dingarpur, Uttar Pradesh, In
Services Provided
40% Custom Web Application Development
35% API Development & Integration
10% Mobile App Development (iOS & Android)
15% E-Commerce Development
AI Summary
“YourCoder specializes in full-stack web development and cybersecurity, delivering custom, secure, and scalable digital solutions with modern technologies for startups and growing businesses.”
Khey Digit Global Solutions Pvt Ltd
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KheyDigit Global Solutions Pvt Ltd is a forward-thinking VCDP (Virtual Consulting Delivery Partner), established by dedicated innovators and seasoned professionals. We assist global businesses in achieving intelligent digital transformation by aligning the latest technologies with their evolving req
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Hyderabad, Telangana, In
Services Provided+1 Services
33% API Development & Integration
14% Generative AI
13% BI & Big Data Consulting & SI
7% Cloud Consulting & SI
AI Summary
“Khey Digit Global Solutions Pvt Ltd delivers intelligent digital transformation through API development, AI-driven automation, cloud consulting, and strategic business solutions, enabling scalable innovation and operational excellence.”
Peddle
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Peddle is your reliable ally in driving business growth in the digital era. As HubSpot Gold Solutions Partners with more than 15 years of experience focusing on technology startups, we have facilitated the success of companies in B2B SaaS, services, e-commerce, and sectors like technology, healthcar
Highlights
2-9
Employees
Raleigh, North Carolina, Us
Services Provided+1 Services
33% CRM Consulting and SI
14% Pay Per Click
13% Demand Generation Marketing
7% Email Marketing & Automation
AI Summary
“Peddle is a HubSpot Gold Solutions Partner with over 15 years' experience, expertise in digital growth for startups across sectors, and certifications in major marketing platforms.”
ODDIN
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ODDIN LLC is dedicated to integrating IT technologies into engineering and design fields. Our goal is to automate as many processes as possible to maximize efficiency in our workflow. We have a specialized team that offers design solutions of varying complexity for the construction and production se
Highlights
50-249
Employees
Kyiv, Ua
Services Provided+2 Services
33% API Development & Integration
14% Generative AI
14% Robotic Process Automation (RPA)
3% ERP Consulting and SI
AI Summary
“ODDIN LLC is a Kyiv-based engineering firm specializing in automation-driven design and IT integration for construction and production, serving over 100 European clients with expert solutions.”
minicode
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Need a cloud application that leverages data? Struggling with outdated, cumbersome data? Worried about cybersecurity risks? Seeking a partner for product development? We're here for you. Since 2011, we have dedicated ourselves to providing tailor-made software and data analytics solutions for small
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Brisbane City, Queensland, Au
Services Provided
55% Custom Web Application Development
30% API Development & Integration
15% Legacy System Modernization
AI Summary
“Since 2011, Minicode delivers custom software and data analytics solutions, helping small to medium businesses modernize data management, enhance cybersecurity, and support product development.”
Epitcore
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Epitcore: Merging Digital Values to Boost Business Growth At Epitcore, we prioritize both people and technology in our operations. We focus on custom software development for businesses of all sizes, from small and medium enterprises to entrepreneurs with innovative product concepts. Our Key Compet
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Nugegoda, Western Province, Lk
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Epitcore specializes in custom software development, integrating technology and human-centric approaches to drive digital innovation and sustainable growth for businesses of varying sizes.”
OstrichTech Software Solutions
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OstrichTech is a specialized tech firm that delivers comprehensive software solutions for businesses of any size. Whether you need custom web and mobile applications or smart home automation, we're here to help bring your ideas to life. Our team merges extensive technical knowledge with an understan
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Beograd, Belgrade, Rs
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“OstrichTech Software Solutions delivers innovative, user-friendly software and smart automation services with high quality and lasting client partnerships across diverse business needs.”
Bizxnexus
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BizXnexus is a web development and AI integration firm located in South Florida, dedicated to businesses committed to growth. We create and develop tailored websites, web applications, and intelligent automation tools that transform your online presence from merely existing to becoming a revenue-gen
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Boca Raton, Florida, Us
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“BizXnexus is a South Florida firm specializing in tailored web development and AI integration, delivering scalable, revenue-focused digital solutions for businesses of all sizes.”
KORSENEX
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Korsenex LLP is a technology startup recognized by DPIIT and based in Bhubaneswar, Odisha. We focus on creating high-performance B2B SaaS products, tools for Enterprise Automation, and solutions for Government Technology (GovTech). Founded by a team of dedicated engineers, our goal is to connect int
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Bhubaneswar, Odisha, In
Services Provided
40% Custom Web Application Development
30% API Development & Integration
20% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Korsenex LLP, an Odisha-based tech startup, develops AI-driven B2B SaaS solutions across GovTech, retail, hospitality, and smart agriculture, enhancing automation and operational efficiency in India.”
ICEKOME LLC
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At our software engineering consultancy, we focus on developing innovative solutions that enable businesses to succeed in the digital age. Our team of expert professionals provides a variety of software engineering services customized to address the specific requirements of clients from various sect
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Custom Web Application Development
35% API Development & Integration
15% E-Commerce Development
AI Summary
“ICEKOME LLC is a software engineering consultancy delivering customized digital solutions across sectors to empower businesses, leveraging expert professionals and innovative technologies for success.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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