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.

How this list is built

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

Greeklancer
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
GreekLancer — Your Trusted Technology Partner At GreekLancer, we assist startups, enterprises, and agencies around the globe in bringing their digital concepts to life. Our expertise includes: 🌐 Web Development 📱 Mobile App Development 🎨 UI/UX Design 📈 Digital Marketing 🛠️ Developer Support & M
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
6% API Development & Integration
4% E-Commerce Development
15% Mobile App Development (iOS & Android)
8% Product UX Strategy
AI Summary
“GreekLancer is a remote-first technology partner offering customized web development, mobile app creation, UI/UX design, digital marketing, and ongoing developer support for global clients.”
M
Myriagon Technology
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We offer a comprehensive business solution that encompasses branding, design, and development.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Karachi, Sindh, Pk
Services Provided+4 Services
8% API Development & Integration
14% Custom Web Application Development
8% Mobile App Development (iOS & Android)
4% E-Commerce Development
AI Summary
“Myriagon Technology delivers comprehensive business solutions integrating branding, design, and development to enhance market presence and drive company growth effectively.”
Dolnexistech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
DolnexisTech is a contemporary, India-based company specializing in Full Stack Web and Mobile App Development, offering innovative digital solutions worldwide. With operational centers in India and partnership locations in the US and UK, we enable startups, SMEs, and large enterprises to grow more e
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+10 Services
5% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% API Development & Integration
4% SaaS Product Development
AI Summary
“DolnexisTech, an India-based firm, delivers full-stack web and mobile app development, AI integration, custom ERP/CRM, and digital marketing services globally for startups to enterprises.”
Isoft Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We focus on addressing the needs of small and medium-sized businesses by providing customized solutions that enhance efficiency, lower expenses, improve user experience, and increase productivity. Our committed team collaborates with you to grasp your goals and delivers personalized software, mobile
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
5% Mobile App Development (iOS & Android)
4% API Development & Integration
5% Custom Web Application Development
2% E-Commerce Development
AI Summary
“Isoft Technologies delivers customized software, mobile apps, and websites for small and medium businesses, enhancing efficiency, productivity, and user experience with advanced technologies.”
OneWorldITSolution
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
I assist founders, agencies, and service-oriented businesses in transforming slow and confusing websites into 𝗳𝗮𝘀𝘁, 𝗰𝗼𝗻𝘃𝗲𝗿𝘀𝗶𝗼𝗻-𝗼𝗿𝗶𝗲𝗻𝘁𝗲𝗱 𝗪𝗼𝗿𝗱𝗽𝗿𝗲𝘀𝘀 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝘀 that effectively deliver leads, sales, and measurable growth—often within the initial 30 days. My wo
Highlights
< $25/hr
Avg Hourly Rate
Services Provided+3 Services
17% Custom Web Application Development
3% API Development & Integration
14% E-Commerce Development
3% Mobile App UI Design
AI Summary
“OneWorldITSolution specializes in creating fast, conversion-focused WordPress websites with custom development, SEO optimization, and scalable designs to drive measurable business growth and user engagement.”
Decnic Systems
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
*UP TO 50% DISCOUNTS AVAILABLE!* Reach out via Global Skype (call/message) at Decnicsystems@gmail.com, or contact us on WhatsApp at +918700851650. You can also email us at itservices@decnic.com or visit our website at https://decnic.com. At DECNIC, an experienced IT technology partner, we offer a wi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+15 Services
3% Legacy System Modernization
5% Backend Development
6% Custom Web Application Development
3% E-Commerce Development
AI Summary
“Decnic Systems is an experienced IT partner offering software development, cloud infrastructure, AI & automation, data analytics, cybersecurity, and digital marketing services to optimize client IT investments.”
Spirit Solutions
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
SpiritSolutions is a software development firm that specializes in creating scalable digital products for startups and expanding businesses. The team develops SaaS platforms, automation systems, and high-performance web applications utilizing contemporary technologies like Node.js, React, Next.js, a
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
4% Backend Development
3% Frontend Development
AI Summary
“Spirit Solutions specializes in scalable software development for startups, delivering custom SaaS, web, and mobile applications with modern technologies across fintech, eCommerce, education, and digital platforms.”
Quantum Horizon
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Quantum Horizon is a technology consulting firm located in Cape Town that assists businesses in modernizing, migrating, and automating their systems. We provide application development, cloud migration, database solutions, and AI automation services to clients in the UK, US, Europe, and Africa. Our
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
6% SaaS Product Development
6% API Development & Integration
9% Custom Web Application Development
4% Legacy System Modernization
AI Summary
“Quantum Horizon, based in Cape Town, offers technology consulting specializing in cloud migration, application development, database management, and AI automation to optimize and modernize business systems globally.”
Innovasoft
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Innovasoft is a reputable software development agency that focuses on customized digital solutions. We specialize in essential services such as SaaS, PaaS, and IaaS development, alongside the creation of web and mobile applications, API integrations, and bespoke website solutions. Our commitment to
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Riyadh, Riyadh, Sa
Services Provided+14 Services
6% SaaS Product Development
5% Custom Web Application Development
4% API Development & Integration
3% Mobile App Development (iOS & Android)
AI Summary
“Innovasoft delivers tailored digital solutions, including SaaS, AI, blockchain, and IoT, combining innovation and expert consulting to enhance user experiences and advance technological progress globally.”
Hartley Lab
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Our goal is to equip you with the skills necessary to thrive and excel in the digital era.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Pune, Maharashtra, In
Services Provided+19 Services
10% Custom Web Application Development
5% QA & Software Testing
4% Legacy System Modernization
5% Mobile App Development (iOS & Android)
AI Summary
“Hartley Lab specializes in empowering individuals with essential skills to succeed and advance in the digital age through comprehensive educational solutions.”

...

...

...

Latest insights & expert perspectives

Explore data-backed surveys with inputs from top industry experts.

Stated minimum project sizes among the firms listed under software development services on Edverise, with the $50,000 band shaded

Vendor Selection

Questions to Ask a Software Development Agency: Six With Proof

A vetting script for second-round agency calls: six questions, the document each answer has to produce, and what a directory listing or a badge really proves.

Nihar Ranjan Rout

10/31/2026

Three software development quotes of $38,000, $94,000 and $210,000 converted to effective hourly rates of $79, $73 and $87.50

Vendor Selection

How to Compare Software Development Quotes Priced 5x Apart

Three bids for the same build are rarely comparable as written. A normalization checklist, a weighted grid adapted from FAR Part 15.3, and the hourly arithmetic.

Akash Mohapatra

10/31/2026

Chart of minimum project size stated by firms listed under AI agent development on Edverise, with the $50,000 band highlighted

Vendor Selection

AI Agent Development Cost: Build, Tokens, Reliability

An AI agent has three costs. Compute the monthly token bill from published list prices, then set the build quote against what listed firms actually charge.

Santanu Prasad Sahoo

10/31/2026

Check All Our Blogs

One Platform. One Promise. One Trust.

Edverise is building the trusted way to find tech vendors. List your company early, or talk to us about backing the platform.

Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

M

Where buyers look next

Latest insights & expert perspectives

Questions to Ask a Software Development Agency: Six With Proof

How to Compare Software Development Quotes Priced 5x Apart

AI Agent Development Cost: Build, Tokens, Reliability

One Platform. One Promise. One Trust.