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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8,490 Companies

List of the Best API Development & Integration Agencies

6th Sense Sites
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6thSenseSites aims to address a common frustration: In today's landscape, creating a website typically involves coordinating between designers for aesthetics, developers for features, and SEO specialists for visibility—wasting both time and money merely to be found on Google. But what if that proces
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
New Delhi, Delhi, In
Services Provided
50% API Development & Integration
30% Brand Identity Design
20% Marketing Collateral Design
AI Summary
“6thSenseSites simplifies website creation by integrating design, development, UI/UX audits, and SEO/AEO services, offering comprehensive solutions for efficient online presence management.”
Trueson
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Trueson is a forward-thinking full-service consultancy known for its expertise in software development and data integration. For the past eight years, we have offered advanced solutions in CRM, Data, BI, and Digital Content to our clients, utilizing a distinctive blend of technical solutions, consul
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Amsterdam, North Holland, Nl
Services Provided
35% CRM Consulting and SI
15% BI & Big Data Consulting & SI
50% API Development & Integration
AI Summary
“Trueson is a full-service consultancy specializing in software development, data integration, CRM, BI, and digital content to improve customer engagement and stakeholder relationship management.”
Tegra Solutions (Pty) Ltd
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Tegra specializes in API Management, Secure Data Transport, and Cyber Security Solutions. With over 20 years of experience and partnerships with reputable software providers, we have a deep understanding of our clients' needs and challenges. Our solutions and services are customized to meet market d
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Pretoria, Gauteng, Za
Services Provided
50% API Development & Integration
35% Managed IT Services
15% Cybersecurity Assessments & Hardening
AI Summary
“Tegra Solutions delivers customized API management, cybersecurity, systems integration, and managed services, leveraging 20+ years' expertise to support digital transformation across Southern Africa.”
The Upthrive Agency
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We are a results-oriented digital agency that focuses on SEO optimization and API automation to help businesses grow more effectively. Our team combines technical know-how with data-driven strategies to enhance search visibility, streamline operations, and eliminate inefficiencies that hinder growth
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Wraxall, England, Gb
Services Provided
50% API Development & Integration
45% Search Engine Optimization (SEO)
5% Email Marketing & Automation
AI Summary
“The Upthrive Agency is a digital firm specializing in SEO optimization and API automation to boost search visibility, streamline operations, and support sustainable business growth across industries.”
BuildShip
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BuildShip is a low-code visual backend creator that enables you to quickly deploy APIs, scheduled tasks, AI workflows, and cloud jobs. You can connect to any database, tools, and AI models to form complete backend processes. Utilize pre-existing nodes or leverage AI to design custom logic nodes tail
Highlights
10-49
Employees
Services Provided
50% API Development & Integration
50% AI Strategy & Roadmap Consulting
AI Summary
“BuildShip is a low-code backend platform enabling rapid API, AI workflow, and cloud job deployment by integrating databases, tools, and AI models for scalable, customizable backend development.”
CoderAIM
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We specialize in data scraping and have three years of experience creating high-performance, multithreaded crawlers and comprehensive data pipelines. Our skills encompass: 🔰 Circumventing anti-bot measures, captchas, and IP restrictions. 🔰 Managing complex applications and dynamic websites. 🔰 Exp
Highlights
2-9
Employees
Services Provided
50% API Development & Integration
50% BI & Big Data Consulting & SI
AI Summary
“CoderAIM specializes in advanced data scraping, developing high-performance multithreaded crawlers and pipelines to efficiently handle complex, dynamic websites and overcome anti-bot measures.”
IOA Digital
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We assist companies of all sizes in minimizing the time dedicated to manual activities. Some examples of automation include:
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Edmonton, Alberta, Ca
Services Provided
50% API Development & Integration
50% CRM Consulting and SI
AI Summary
“IOA Digital helps companies reduce manual work through innovative automation solutions, enhancing operational efficiency and productivity across diverse business processes and industries.”
VIZBL AI INC
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VIZBL creates immersive 3D modeling and Augmented Reality solutions that foster stronger connections between companies and their customers. By combining meticulous design, technical know-how, and a focus on human experience, we provide technology that enhances people's confidence while making busine
Highlights
10-49
Employees
Services Provided
50% API Development & Integration
50% Ecommerce Marketing
AI Summary
“VIZBL AI INC. develops immersive 3D modeling and augmented reality solutions that enhance customer engagement, improve business efficiency, and deliver impactful human-centered technology experiences.”
Recut
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Free URL shortener that allows you to generate ideal URLs for your business. Recut enables you to create and distribute branded links using your own custom domains at scale. Sign up for free!
Highlights
2-9
Employees
Services Provided
50% API Development & Integration
50% Other Digital Marketing
AI Summary
“Recut offers a free URL shortening service that enables businesses to create and distribute branded links using custom domains, enhancing brand visibility and link management at scale.”
ReachMax
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ReachMax is a dedicated branch of Local Pros that was established in 2025 to offer businesses around the globe expert WhatsApp automation solutions. Local Pros has been supporting local businesses since 2015 and has utilized WhatsApp technology for the last five years. ReachMax marks our renewed com
Highlights
2-9
Employees
Services Provided
50% API Development & Integration
50% Other Digital Marketing
AI Summary
“ReachMax, a branch of Local Pros, specializes in global WhatsApp Business API solutions, offering setup, automation, marketing, and integration services to enhance business communications and efficiency.”

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Top API Development & Integration Firms

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