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

Advanced Millennium Technologies
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Advanced Millennium Technologies (AMT), a prominent global service provider, offers consulting, implementation, business transformation, and operational solutions to clients worldwide. The company integrates cutting-edge technologies to meet critical business needs. AMT was founded in Bangalore, Ind
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Bengaluru, Karnataka, In
Services Provided+8 Services
8% Mobile App Development (iOS & Android)
5% API Development & Integration
5% QA & Software Testing
7% Backend Development
AI Summary
“Advanced Millennium Technologies delivers global consulting and agile software solutions, specializing in custom web, mobile, AI, IoT, cloud, blockchain, CRM, and enterprise application development.”
Manifest FTS
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We leverage innovation to create value for businesses and brands. Manifest is a digital consultancy and software development firm that enables progressive brands to thrive with state-of-the-art digital solutions. Our skills encompass brand and digital strategy, user experience design, software devel
Highlights
Services Provided+8 Services
5% API Development & Integration
8% Custom Web Application Development
2% E-Commerce Development
5% Mobile App Development (iOS & Android)
AI Summary
“Manifest FTS is a digital consultancy and software development firm delivering innovative brand strategy, user experience design, and data solutions to empower progressive businesses and foster growth.”
Aanyor Technology Pvt LTd
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Aanyor Technology Pvt Ltd is an innovative IT solutions company located in Surat, India. Established in 2025, we focus on custom software development, ERP solutions, mobile applications, and cloud services. We create comprehensive digital products and enterprise platforms utilizing advanced technolo
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
12% Custom Web Application Development
5% API Development & Integration
8% Mobile App Development (iOS & Android)
3% Blockchain & Web3 Development
AI Summary
“Aanyor Technology Pvt Ltd is a Surat-based IT firm specializing in custom software, ERP, mobile apps, cloud services, AI/ML, and blockchain to drive global digital transformation.”
Afrisyntech Solutions
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Afrisyntech is a technology company located in Kenya that focuses on providing innovative software solutions, AI systems, and scalable digital platforms tailored for startups, SMEs, and larger enterprises. Our skilled team, composed of software engineers, AI experts, and business analysts, collabora
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+10 Services
14% Custom Web Application Development
7% Mobile App Development (iOS & Android)
8% API Development & Integration
5% E-Commerce Development
AI Summary
“Afrisyntech Solutions, based in Kenya, delivers innovative software, AI, and fintech solutions tailored to startups, SMEs, and enterprises, emphasizing quality, scalability, and client collaboration for digital transformation.”
Merim Tech
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MERIM Tech is an innovative and energetic IT company leading the way in technological progress. We are dedicated to exploring new frontiers by providing tailored solutions to meet various business requirements. Our skilled team possesses extensive expertise in fields like software development, web d
Highlights
10-49
Employees
Aurangabad, Maharashtra, In
Services Provided+10 Services
6% SaaS Product Development
3% E-Commerce Development
3% CMS Development & Customization
4% API Development & Integration
AI Summary
“MERIM Tech is a dynamic IT company specializing in software development, web design, AI, and IT consulting, delivering innovative, tailored solutions worldwide with a client-focused, ethical approach.”
allaboutapps
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allaboutapps is a premier full-service software agency headquartered in Vienna, specializing in bespoke mobile, web, and AI solutions for businesses. We assist companies in developing, optimizing, and scaling their digital products—from initial concept to launch—while emphasizing performance, user e
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Vienna, Vienna, At
Services Provided+9 Services
7% Custom Web Application Development
12% Mobile App Development (iOS & Android)
3% E-Commerce Development
7% Backend Development
AI Summary
“allaboutapps is a Vienna-based full-service software agency delivering tailored mobile, web, AI, and cloud solutions, emphasizing performance, scalability, and user experience for diverse businesses.”
We Technolabs
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WeTechnolabs is a group of passionate technology aficionados and proficient engineers, developers, and programmers. Our primary focus is on strategic research and development, especially on innovative concepts still in the idea phase. We excel in tackling challenges, particularly those that involve
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+6 Services
14% Custom Web Application Development
17% Mobile App Development (iOS & Android)
3% API Development & Integration
14% Product UX Strategy
AI Summary
“WeTechnolabs specializes in strategic R&D and diverse technology services including app development, AI/ML, and consulting, transforming innovative ideas into practical, client-focused solutions.”
AppCycle Studio
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AppCycle Studio is a specialized mobile development firm focused on creating high-quality, scalable applications for startups, growing companies, and large enterprises. With a strong background in iOS, Android, and cross-platform technologies, we support our clients throughout the entire process, fr
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
28% Mobile App Development (iOS & Android)
5% API Development & Integration
14% Product UX Strategy
12% Mobile App UI Design
AI Summary
“AppCycle Studio delivers end-to-end mobile development services, specializing in iOS and Android apps for startups to enterprises, emphasizing quality, scalability, and long-term client partnerships.”
Macondo Softwares
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At Macondo Magic Softwares, we offer IT solutions that are specifically designed to meet your unique requirements. Our skilled team has backgrounds in top technology companies and remains up-to-date with industry trends. We take a consultative approach to every project, ensuring successful outcomes.
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Chia, Co
Services Provided+9 Services
4% Blockchain & Web3 Development
3% Legacy System Modernization
8% Custom Web Application Development
5% E-Commerce Development
AI Summary
“Macondo Softwares delivers customized IT solutions with expertise in software development, UI/UX design, AI integration, and cloud consulting, emphasizing quality, partnership, and tailored support.”
Brevton Infotech
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Brevton Infotech, part of the Brevton Group of Companies, is an innovative technology firm that provides intelligent, data-driven, and future-oriented solutions designed to help businesses innovate, grow, and transform with assurance. We connect advanced technology with the practical needs of busine
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+15 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
4% API Development & Integration
4% Frontend Development
AI Summary
“Brevton Infotech delivers intelligent, scalable technology solutions, integrating AI, software development, cloud services, and automation to drive business innovation, efficiency, and sustainable growth.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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