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

Jidat IT
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Web Development & Automation Agency | Scalable Solutions for Ambitious Teams We assist startups, agencies, and educators in automating processes, expanding platforms, and creating innovative products. 🔹 Over 6 Years of Experience | EST Time Zone | Full-Time Team | Long-Term Commitment At [Agency Na
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Islamabad, Pk
Services Provided
30% Custom Web Application Development
5% Mobile App Development (iOS & Android)
15% API Development & Integration
50% Web App UI Design
AI Summary
“Jidat IT specializes in scalable web development and automation, delivering custom web apps, API integrations, and no-code workflows to startups and agencies for streamlined business solutions.”
ExN
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We transform your concept into a fully operational, clean, and efficiently optimized website quickly. Over 20 happy clients have selected ExN as their main software development agency.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Novi Sad, Rs
Services Provided
15% API Development & Integration
30% Custom Web Application Development
5% E-Commerce Development
50% DevOps Engineering
AI Summary
“ExN is a software development agency specializing in rapidly transforming concepts into fully operational, clean, and optimized websites, trusted by over 20 satisfied clients.”
BDSD Technology
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
BDSD Technology is a prominent software development company with numerous global clients. We specialize in integrating various GDS systems such as Amadeus, Sabre, Galileo, Travelport UAPI, Abacus, Wordspan, and Travefusion for flight API integration. Additionally, we have incorporated over 100 hotel
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Noida, Uttar Pradesh, In
Services Provided
15% Mobile App Development (iOS & Android)
19% API Development & Integration
33% Search Engine Optimization (SEO)
33% Managed IT Services
AI Summary
“BDSD Technology specializes in developing integrated travel solutions, offering global B2B and B2C booking platforms with comprehensive GDS and aggregator integrations, supported by robust R&D and 24/7 services.”
Young & Heever
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Young & Heever is an innovative Digital Agency located in Wollongong, specializing in Web Design and Business Process Automation. We connect well-designed websites with effective systems. Where many agencies merely focus on launching, we explore the intricacies of your business framework. By incorpo
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Tullimbar, New South Wales, Au
Services Provided
30% Custom Web Application Development
20% API Development & Integration
20% Generative AI
30% Workflow Automation (Zapier / Make / n8n)
AI Summary
“Young & Heever is a Wollongong digital agency specializing in web design and business process automation, integrating AI and systems to streamline operations for startups and small businesses.”
Techwebsoft
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We offer budget-friendly custom web development services with an emphasis on timely delivery for businesses of all sizes, from startups to large enterprises. Our specialty includes creating mobile apps, customized CRM/ERP systems, business automation software, and bespoke web applications that enhan
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Klemzig, South Australia, Au
Services Provided
20% API Development & Integration
30% Mobile App Development (iOS & Android)
20% Conversion Rate Optimization (CRO)
30% Search Engine Optimization (SEO)
AI Summary
“Techwebsoft delivers affordable custom web and mobile solutions, including CRM/ERP systems and business automation software, serving diverse Australian businesses with scalable, timely digital innovations.”
1Center
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Located in Charlotte, North Carolina, with additional offices in the US and India, 1Center is a highly reputable and comprehensive e-commerce partner for a wide range of clients, from large global corporations to emerging businesses. Over the past 16 years, our team has successfully developed hundre
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Ahmedabad, Gujarat, In
Services Provided+2 Services
15% API Development & Integration
25% E-Commerce Development
10% Custom Web Application Development
18% Product UX Strategy
AI Summary
“1Center is a trusted e-commerce partner offering design, engineering, and growth expertise to global brands, delivering tailored B2C, B2B, and D2C solutions that drive revenue and loyalty.”
K4 Tech Solutions
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
K4 Tech Solutions is a burgeoning IT outsourcing firm focused on tailored mobile and web application development. Our committed team provides scalable and user-friendly solutions designed to help businesses enhance growth and increase profitability. We emphasize open communication, teamwork, and goi
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided
10% Blockchain & Web3 Development
20% API Development & Integration
35% Custom Web Application Development
35% Mobile App Development (iOS & Android)
AI Summary
“K4 Tech Solutions offers tailored mobile and web application development services, delivering scalable, user-friendly IT solutions to support business growth and enhance profitability.”
Appwise Solution
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Appwise Solutions, we turn concepts into cutting-edge digital solutions. Our expertise lies in three main fields: web design and development, mobile application development, and tailored software solutions.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Karachi, Sindh, Pk
Services Provided
35% Custom Web Application Development
35% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Appwise Solutions specializes in web and mobile app development alongside customized software solutions, transforming ideas into advanced digital products with professional expertise.”
GEXABYTE
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
GEXABYTE is a prominent blockchain and software development firm located in Almaty, Kazakhstan, providing cutting-edge Web 2.0 and Web 3.0 solutions since 2018. Our team of over 50 skilled professionals offers comprehensive development services for blockchain projects, cryptocurrency exchanges, and
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Almaty, Almaty City, Kz
Services Provided
5% Mobile App Development (iOS & Android)
10% API Development & Integration
35% Blockchain & Web3 Development
50% Other IT Consulting and SI
AI Summary
“GEXABYTE is a leading Kazakh blockchain and software firm delivering Web 2.0 and 3.0 solutions, specializing in blockchain development, smart contracts, DeFi, and enterprise applications since 2018.”
Cloudflight
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
WHY CHOOSE CLOUDFLIGHT The Cloudflight Group is a premier partner for comprehensive digital transformation services. The company provides strategic consulting, tailored software development, and cloud operations, emphasizing eCommerce, IoT, artificial intelligence, and cloud-native application devel
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Amstetten, At
Services Provided+2 Services
15% API Development & Integration
25% Custom Web Application Development
10% E-Commerce Development
20% Custom AI Chatbot Development
AI Summary
“Cloudflight is a leading digital transformation partner offering strategic consulting, custom software development, and cloud operations across Europe, specializing in eCommerce, IoT, AI, and cloud-native 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

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.