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

Lakeview Labs
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Established in 2013 in Chicago, Lakeview Labs has created more than 30 applications and partnered exclusively with high-growth startups and mid-sized businesses in the Midwest. We intentionally maintain a small team, handling a maximum of seven projects per year, to provide our clients with focused
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Chicago, Illinois, Us
Services Provided
20% Custom Web Application Development
45% Mobile App Development (iOS & Android)
20% Backend Development
15% API Development & Integration
AI Summary
“Lakeview Labs, founded in 2013 in Chicago, specializes in developing top-ranked applications across various categories, partnering with high-growth startups and mid-sized Midwest businesses.”
Grohigh
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GroHigh is an international technology consulting and product development firm that assists businesses in speeding up their growth with smart, data-focused solutions. We focus on custom software development, AI and machine learning integration, cloud services, and digital transformation consulting.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
3% Workflow Automation (Zapier / Make / n8n)
4% AI Strategy & Roadmap Consulting
3% AI Model Fine-Tuning & Training
3% MLOps & Model Deployment Infrastructure
AI Summary
“GroHigh is a global technology consulting and product development firm specializing in custom software, AI, cloud services, and digital transformation to accelerate business growth and efficiency.”
DataDrill
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DataDrill is a data engineering partner specifically designed for the life sciences sector. Established in 2022 in Novi Sad, our mission is to assist CROs, pharmaceutical companies, biotech firms, and digital health teams in consolidating disparate data, reducing manual reporting, and ensuring clini
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Novi Sad, Rs
Services Provided+2 Services
35% Custom Web Application Development
15% API Development & Integration
15% AI Strategy & Roadmap Consulting
10% LLM Integration & Prompt Engineering
AI Summary
“DataDrill specializes in data engineering for life sciences, helping organizations consolidate data, streamline reporting, and optimize workflows for audit readiness with pragmatic, scalable solutions.”
Harifly Technologies Private Limited
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Harifly Technologies is a multifaceted web development firm that focuses on tailored website creation, web application development, and comprehensive full-stack services. They also excel in Android app development, custom software solutions, and UI/UX design. With nearly universal acclaim, all revie
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% E-Commerce Development
AI Summary
“Harifly Technologies excels in bespoke web and Android app development, full-stack solutions, and UI/UX design, praised for technical expertise, project management, and reliable delivery.”
Eyecon Consultant
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Eyecon Consultant is a reputable software development and technology solutions provider dedicated to enhancing business operations with dependable, high-quality digital products. We specialize in custom software creation, business automation, RFID solutions, barcode and QR code systems, website deve
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% API Development & Integration
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Eyecon Consultant delivers custom software, automation, and integration solutions across industries, enhancing operational efficiency, tracking accuracy, and sustainable business growth through reliable, scalable technology.”
Bitlooms
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We are a specialized software studio that transforms intricate challenges into seamless digital solutions. We collaborate with forward-thinkers to create, develop, and expand the technology of the future.
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
25% API Development & Integration
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Bitlooms is a software studio specializing in transforming complex problems into seamless digital solutions, partnering with innovators to develop advanced future technologies.”
Berg Media Digital
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At Berg Media Digital, we focus on providing advanced digital solutions aimed at transforming businesses and fostering growth. With over a decade of experience, we offer strategic consulting, digital marketing, eye-catching websites, and comprehensive branding services, all geared towards converting
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Abu Dhabi, Abu Zaby, Ae
Services Provided
20% E-Commerce Development
40% Custom Web Application Development
20% API Development & Integration
20% Mobile App Development (iOS & Android)
AI Summary
“Berg Media Digital delivers strategic consulting, digital marketing, eye-catching websites, and branding services to transform businesses and drive growth with over a decade of expertise.”
UXridge
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At UXridge, we understand that design goes beyond mere appearances; it’s about crafting user experiences that are both meaningful and intuitive. We prioritize empathy, research, and teamwork to create solutions that address complex challenges and surpass user expectations. Our team is committed to s
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Durban North, Za
Services Provided
20% API Development & Integration
10% QA & Software Testing
20% Custom Web Application Development
50% Brand Identity Design
AI Summary
“UXridge specializes in empathetic, research-driven design focused on creating intuitive user experiences through innovative solutions, teamwork, and up-to-date practices, enhancing lives and businesses.”
Followbright
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Since 2002, our award-winning team, recognized nationally, has served as a reliable partner for countless U.S. businesses, organizations, and well-funded entrepreneurs/startups seeking top-tier website planning, problem-solving, consulting, and development. When You Need More than Just an Attractive
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
18% API Development & Integration
32% Custom Web Application Development
30% Web App UI Design
20% Interaction Design
AI Summary
“Followbright, an award-winning team since 2002, offers strategic website planning, design, and development with clear, responsive communication, solving complex digital challenges for U.S. businesses and startups.”
Agiledrop - EU-based Official Laravel Partner
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Agiledrop assists businesses and organizations in enhancing their development capabilities by supplying skilled and dependable web developers. We focus on open source web technologies, particularly Laravel and PHP. Our clientele spans various sectors, including technology and telecommunications, tra
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Ljubljana, Si
Services Provided+2 Services
35% Custom Web Application Development
15% API Development & Integration
20% Custom AI Chatbot Development
13% AI Strategy & Roadmap Consulting
AI Summary
“Agiledrop, an EU-based official Laravel partner, provides expert open source developers, enabling diverse clients to swiftly augment teams with skilled professionals adhering to best practices in security and accessibility.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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