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

Reed Consulting LLC
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Are you dealing with costly and overly complicated tech solutions? Reed Consulting offers straightforward, budget-friendly, and effective options. We create tailored websites, develop mobile applications, implement cloud services, and provide strategic advice—all while ensuring transparent pricing,
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Services Provided
34% API Development & Integration
33% Operational Process Consulting
33% DevOps Engineering
AI Summary
“Reed Consulting LLC delivers affordable, tailored technology solutions including website design, mobile app development, cloud services, and strategic consulting, emphasizing transparency and efficient results.”
eBox Code
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We specialize in backend development, API integration and development, as well as mobile app development for both iOS and Android platforms. Our goal is to assist you in navigating the digital transformation journey for your company or business.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Culiacan Rosales, Sinaloa, Mx
Services Provided+1 Services
35% Backend Development
30% API Development & Integration
25% Mobile App Development (iOS & Android)
5% E-Commerce Development
AI Summary
“eBox Code specializes in backend and API development, alongside iOS and Android mobile apps, aiding businesses in their digital transformation efforts.”
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Exlabs
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We are a technology partner that integrates expertise in Cloud Native, DevSecOps, and NodeJS. What services do we offer? What are our quality standards?
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Gliwice, Silesian, Pl
Services Provided
23% API Development & Integration
10% Legacy System Modernization
17% Custom Web Application Development
50% Cloud Consulting & SI
AI Summary
“Exlabs is a technology partner specializing in Cloud Native, DevSecOps, and NodeJS, delivering integrated solutions with a focus on expertise and quality standards.”
DataCortex
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DataCortex develops high-quality AI, data engineering, and decision intelligence tailored for rapidly growing startups—without the expense of a $200k+ data team. We transform disjointed data into automated workflows and real-time intelligence ready for decision-making through comprehensive, producti
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
7% AI Strategy & Roadmap Consulting
4% Custom AI Chatbot Development
8% Machine Learning Model Development
5% Workflow Automation (Zapier / Make / n8n)
AI Summary
“DataCortex delivers rapid, enterprise-quality AI and data engineering solutions for startups, automating data workflows and decision intelligence without costly teams, led by experienced founders globally.”
WSaaS
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WSaaS is an AWS-Certified Data and AI Consulting Firm dedicated to providing expert guidance and advanced solutions in cloud, data, and AI for CEOs, CIOs, and CTOs, facilitating business growth and operational efficiency. As your trusted partner, we help you swiftly obtain the insights needed to exp
Highlights
$10,000+
Min Project Size
10-49
Employees
Services Provided+4 Services
7% AI Strategy & Roadmap Consulting
7% BI & Big Data Consulting & SI
5% Machine Learning Model Development
3% Custom AI Chatbot Development
AI Summary
“WSaaS is an AWS-certified firm specializing in AI strategy, data analytics, and software development, delivering advanced cloud-based solutions that transform data into actionable insights for business growth.”
Erudite Software Ltd
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Revolutionizing Business Processes with AI-Driven Software Solutions We are an innovative software development firm focused on AI-enhanced solutions throughout the entire Microsoft technology framework. Our goal is to update and optimize business operations through smart, tailor-made software that
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
30% API Development & Integration
15% QA & Software Testing
15% Frontend Development
AI Summary
“Erudite Software Ltd. delivers AI-driven, custom software solutions leveraging Microsoft technologies to enhance business efficiency, modernize systems, and support scalable, intelligent digital transformation.”
LunarBuild
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We assist individuals in creating apps and launching them in only a few weeks through the use of visual development tools.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“LunarBuild empowers users to rapidly develop and launch applications using visual development tools, streamlining the app creation process within weeks for diverse needs.”
Codeverse Weenggs Solutions LLP
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We are a premier provider of IT solutions, committed to offering innovative technology services that help businesses succeed in the digital world. Our areas of expertise include Custom Software Development, Web and Mobile Application Development, Cloud Solutions, and Data Analytics. We prioritize qu
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided
25% API Development & Integration
50% Custom Web Application Development
25% Mobile App Development (iOS & Android)
AI Summary
“Codeverse Weenggs Solutions LLP delivers customized IT solutions including software, web, mobile, cloud, and analytics across diverse industries, emphasizing innovation, quality, and client collaboration for business growth.”
Foo Bar
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A specialized consulting firm that concentrates on developing applications for small and medium enterprises.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Pittsburgh, Pennsylvania, Us
Services Provided
60% Custom Web Application Development
30% API Development & Integration
10% Legacy System Modernization
AI Summary
“Foo Bar is a consulting firm specializing in application development, delivering tailored technological solutions to support the growth of small and medium enterprises across industries.”
Nocode Nest
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We are among the leading NoCode agencies, staffed by highly skilled professionals who have developed programs, applications, and digital solutions for a wide range of clients. Our team specializes in using top NoCode platforms such as Bubble.io, Webflow, Airtable, Zapier, and Make (Integromat), amon
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
60% Mobile App Development (iOS & Android)
30% API Development & Integration
10% QA & Software Testing
AI Summary
“Nocode Nest is a leading NoCode agency delivering diverse digital solutions through expert use of platforms like Bubble.io, Webflow, Airtable, Zapier, and Make (Integromat).”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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