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

RabIT Solutions
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Our mission is to support our clients in achieving growth through technological innovation and creating a significant impact in their sectors. Since 2024, we have been certified in ISO 9001 and ISO 27001. We strive to deliver fully tailored software solutions of the utmost quality to both small and
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Szeged, Csongrad Csanad, Hu
Services Provided+4 Services
13% QA & Software Testing
13% API Development & Integration
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
AI Summary
“RabIT Solutions delivers customized, high-quality software solutions globally, supporting SMEs and large corporations through technological innovation and a skilled, dedicated team focused on client success.”
Sytium
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Sytium is a forward-thinking software development firm focused on providing strong, high-performance software and websites. We excel in developing reliable applications, effective automation solutions, and customized websites that are carefully crafted to meet the unique goals of each client.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Services Provided+1 Services
20% API Development & Integration
30% Custom Web Application Development
25% Web App UI Design
15% UX Research & Usability Testing
AI Summary
“Sytium is a software development firm specializing in high-performance applications, effective automation solutions, and tailored websites designed to meet diverse client objectives reliably and efficiently.”
Digip Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
India-based software consulting service.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
20% API Development & Integration
40% Custom Web Application Development
15% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Digip Technologies is an India-based software consulting firm specializing in delivering diverse digital solutions across industries, enhancing business processes with innovative and tailored technology services.”
Webexpert Infotech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At WebXpert Infotech, we hold the belief that digital solutions should offer more than just aesthetic appeal; they must create genuine, measurable outcomes. That’s why we craft websites and software that not only exist but also perform, inspire, and foster growth. Whether you are a startup ready to
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% API Development & Integration
25% E-Commerce Development
AI Summary
“WebXpert Infotech specializes in goal-driven web and software development, offering custom IT solutions, UI/UX design, and e-commerce services to foster business growth and success.”
Cold Banana Limited
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are Cold Banana, specialists in .NET, Umbraco Gold Partners, and experts in Kentico and Sitecore. Located in Bournemouth, we provide comprehensive online solutions throughout the UK and EMEA. We're pleased to note that we've never encountered an unsolvable issue. Utilizing various CMS platforms,
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Bournemouth, England, Gb
Services Provided+3 Services
23% Custom Web Application Development
10% Mobile App Development (iOS & Android)
12% API Development & Integration
5% E-Commerce Development
AI Summary
“Cold Banana is a Bournemouth-based specialist in .NET and leading CMS platforms, delivering innovative web and mobile solutions across the UK and EMEA with award-winning expertise.”
Trimtab Solutions DOO
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
TrimTab Solutions assists businesses in maximizing the value of their data. We specialize in SQL and Python, with experience in creating intricate stored procedures for common platforms like Oracle and Microsoft SQL Server, as well as PostgreSQL and MySQL. What sets TrimTab Solutions apart is our co
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Beograd, Belgrade, Rs
Services Provided+6 Services
17% BI & Big Data Consulting & SI
3% ERP Consulting and SI
13% Cloud Consulting & SI
13% API Development & Integration
AI Summary
“TrimTab Solutions excels in data management, offering tailored data warehousing, business intelligence, ETL development, and migration services by leveraging SQL and Python expertise to optimize business data value.”
GeekDance
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
GeekDance is a technology consulting and product engineering firm that focuses on digital transformation and AI-based solutions. Established in 2015 and based in Shenzhen, China, the company operates four research and development centers in Hangzhou, Xi’an, and Zhuhai, and has successfully completed
Highlights
$75,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Shenzhen, Guangdong, Cn
Services Provided+2 Services
25% Custom Web Application Development
15% API Development & Integration
10% Mobile App Development (iOS & Android)
20% AI Strategy & Roadmap Consulting
AI Summary
“GeekDance is a Shenzhen-based technology consulting firm specializing in AI-driven digital transformation, custom software, and IoT solutions, delivering enterprise-grade projects across 12+ countries with strong R&D focus.”
UnicodeTech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At UnicodeTech, we transform innovative concepts into impactful digital products. Whether it's bespoke software or cloud solutions, we assist businesses in optimizing their operations, growing, and achieving success through effective technology. Our dynamic and ambitious team is dedicated to fosteri
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
15% API Development & Integration
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
20% Product UX Strategy
AI Summary
“UnicodeTech specializes in developing innovative digital products and customized technology solutions, enabling businesses to enhance operations, grow, and achieve success through effective software and cloud services.”
GEM Corporation
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Established in 2014, GEM Corporation has emerged as a leading mid-size IT services and consulting firm, gaining global recognition for its excellence and innovation. With a team of over 400 IT experts, GEM specializes in offering technology solutions that promote digital transformation for clients a
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
250-999
Employees
Hanoi, Vn
Services Provided+5 Services
20% Custom Web Application Development
13% Mobile App Development (iOS & Android)
13% API Development & Integration
5% Legacy System Modernization
AI Summary
“GEM Corporation, founded in 2014, is a global IT services and consulting firm specializing in innovative digital transformation solutions across multiple industries, serving Fortune 500 clients worldwide.”
Shunyavkash
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Shunyavkash is your strategic partner for technical growth! We collaborate with driven individuals and companies to achieve tangible results. Whether it’s creating high-performing websites, integrating CRMs seamlessly, or developing comprehensive SaaS platforms, we provide forward-thinking digital s
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+5 Services
18% Custom Web Application Development
13% API Development & Integration
10% SaaS Product Development
5% Backend Development
AI Summary
“Shunyavkash partners with businesses to deliver scalable digital solutions, including high-performance websites, CRM integrations, and SaaS platforms using React, Node.js, and CMS expertise.”

...

...

...

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.