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

Elevanta Services Co., Ltd.
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Elevanta was established by a Senior Executive with over ten years of practical experience in managing intricate manufacturing and supply chain operations. This background allows us to approach Odoo implementation from a Managing Director's perspective. We go beyond mere system configuration; we lev
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% Custom Web Application Development
20% API Development & Integration
10% E-Commerce Development
43% ERP Consulting and SI
AI Summary
“Elevanta leverages a decade of manufacturing leadership to deliver comprehensive Odoo ERP solutions, optimizing workflows, Thai tax compliance, and failed implementation recovery for enhanced operational efficiency.”
LogicalFire IT Consultants Pvt Ltd
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LogicalFire IT Consultants is a leading technology partner that focuses on large-scale digital engineering. We connect robust enterprise architecture with innovative solutions. Our expertise lies in .NET Core Microservices and Azure Cloud, enabling us to create resilient, scalable multi-tenant SaaS
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New Delhi, Delhi, In
Services Provided+5 Services
3% E-Commerce Development
15% Custom Web Application Development
5% Mobile App Development (iOS & Android)
18% API Development & Integration
AI Summary
“LogicalFire IT Consultants specializes in scalable digital engineering using .NET Core Microservices and AI-driven solutions, delivering resilient, future-proof architectures across fintech, insurtech, and enterprise domains.”
Technecto
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At Technecto, we offer cost-effective, top-notch digital services designed to support the success of small businesses, startups, and entrepreneurs. Whether you need web development or digital marketing, we're here to ensure your growth.
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
45% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Technecto provides affordable, high-quality digital services including web development and marketing aimed at fostering growth for small businesses, startups, and entrepreneurs.”
Cybreg
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Inteligentní IT řešení pro správu rizik a dodržování předpisů, které vyhovují DORA, NIS2 a dalším regulacím. Připravená data a komplexní proces implementace v souladu s požadavky regulačních orgánů.
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Brno-Zabovresky, Cz
Services Provided+1 Services
20% API Development & Integration
14% QA & Software Testing
33% Robotic Process Automation (RPA)
23% DevOps Engineering
AI Summary
“Cybreg offers intelligent IT solutions for risk management and regulatory compliance, ensuring readiness for DORA, NIS2, and other standards through comprehensive implementation processes.”
Sydney Software Development
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Since 2010, SSD has focused on optimizing financial processes with both custom and ready-made automation solutions. We provide fixed-price engagements, ensuring you understand the total cost of your project upfront. Reach out today for a conversation and a complimentary assessment of your project ne
Highlights
$5,000+
Min Project Size
2-9
Employees
Surry Hills, New South Wales, Au
Services Provided+1 Services
15% Custom Web Application Development
15% API Development & Integration
4% QA & Software Testing
33% Cybersecurity Assessments & Hardening
AI Summary
“Sydney Software Development, established in 2010, specializes in custom and ready-made automation solutions to optimize financial processes, offering transparent fixed-price engagements and free project assessments.”
micobo gmbh
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Micobo is a prominent software development firm based in Europe that assists financial institutions and issuers in overseeing their assets on the Blockchain. The company's Enterprise Tokenization Platform and API integration offer a tailored, regulatory-compliant white-label SaaS solution designed f
Highlights
$250,000+
Min Project Size
10-49
Employees
Frankfurt am Main, Hesse, De
Services Provided
50% Blockchain & Web3 Development
35% SaaS Product Development
15% API Development & Integration
AI Summary
“Micobo GmbH is a European software developer delivering compliant Enterprise Tokenization SaaS and APIs, enabling financial institutions to manage blockchain digital assets and streamline investor onboarding.”
Afri Software Solutions
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We are a company providing customized software solutions to businesses in emerging markets, with a strong base in Ethiopia. Our expertise lies in developing effective, scalable tools that tackle genuine business issues. Our team consists of seasoned professionals in software development, business st
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
45% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Afri Software Solutions delivers tailored, scalable software to emerging market businesses, emphasizing trust, quality, and collaboration to drive sustainable growth and operational success.”
Free Thinkers Consulting
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Free Thinkers Consulting is a senior-led partner specializing in Salesforce development, dedicated to assisting small and mid-sized businesses in personalizing Salesforce to align with their operational needs. We move past standard configurations to provide customized, intelligent solutions that enh
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Brandon, Florida, Us
Services Provided+2 Services
33% CRM Consulting and SI
5% ECM Consulting and SI
7% ERP Consulting and SI
5% Other IT Consulting and SI
AI Summary
“Free Thinkers Consulting specializes in tailored Salesforce development for small to mid-sized businesses, delivering customized, efficient solutions through authentic, fully domestic collaboration for sustainable success.”
Bucky Agency
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Bucky Agency assists professional services firms in optimizing their operations with tailored AI automation and workflow systems. We create secure and scalable solutions that minimize manual tasks, enhance client experiences, and foster sustainable growth.
Highlights
$5,000+
Min Project Size
2-9
Employees
St. Petersburg, Florida, Us
Services Provided
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
15% API Development & Integration
50% AI Strategy & Roadmap Consulting
AI Summary
“Bucky Agency specializes in designing AI-driven automation and workflow solutions to streamline operations, improve client experiences, and support sustainable growth for professional services firms.”
dMorpheus
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Established in 2013, DMorpheus has earned a reputation as a reliable technology partner for Fortune 500 companies, large multinational corporations, small and medium-sized businesses, and startups. Our international team of creative professionals, based in Austria and specializing in web development
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Klagenfurt am Worthersee, Carinthia, At
Services Provided
40% Web App UI Design
30% Custom Web Application Development
20% E-Commerce Development
10% API Development & Integration
AI Summary
“dMorpheus excels in custom web application development, e-commerce solutions, and API integration, offering clients tailored and scalable software that meets complex functional requirements with advanced Wix Studio and Velo capabilities.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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