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

TiboLogic
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
I am a full-stack software developer with over a decade of experience in enterprise settings. As the founder of TiboLogic, I provide tailored .NET solutions, system integrations, and business automation services to clients around the globe. My Areas of Expertise: - **Custom .NET Development**: Cre
Highlights
$100-149/hr
Avg Hourly Rate
Services Provided+1 Services
35% Custom Web Application Development
25% API Development & Integration
20% Backend Development
15% Frontend Development
AI Summary
“TiboLogic specializes in custom .NET development, system integrations, and business process automation across finance, healthcare, and enterprise sectors, delivering tailored, scalable solutions globally with expert full-stack expertise.”
Gravit-e Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Gravit-e creates web applications and tailored software solutions to assist in the growth and optimization of your business. Our software is specifically designed to meet the individual requirements of your company and to tackle the distinct challenges you face now and in the future. We specialize i
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Surrey, British Columbia, Ca
Services Provided
30% Custom Web Application Development
10% Cloud Consulting & SI
10% API Development & Integration
10% Cloud Consulting & SI
AI Summary
“Gravit-e Technologies, a Canadian firm, specializes in customized web applications, cloud consulting, and software solutions that streamline business processes and support sustainable growth.”
PrimeWeb
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At PrimeWeb, we are dedicated to making your digital aspirations a reality. Our team focuses on cutting-edge software solutions that inspire creativity and help realize your vision.
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Sofia, Sofia, Bg
Services Provided
23% Custom Web Application Development
17% Mobile App Development (iOS & Android)
10% API Development & Integration
50% LLM Integration & Prompt Engineering
AI Summary
“PrimeWeb delivers innovative software solutions that empower creativity and transform digital visions into reality, supporting diverse technology needs with a dedicated professional team.”
Blott
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
As an international AI consulting firm, we focus on comprehensive transformation for intricate, heavily regulated sectors such as banking, insurance, capital markets, and wealth and asset management. We collaborate with visionary leaders to create AI-driven products, smart interfaces, and autonomous
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+5 Services
7% Mobile App Development (iOS & Android)
14% API Development & Integration
13% Custom Web Application Development
20% Product UX Strategy
AI Summary
“Blott is an international AI consulting firm specializing in transforming complex, regulated financial sectors by developing AI-driven products, smart interfaces, and autonomous systems with precision.”
EUX Digital
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
As an official WooCommerce Pro Partner, we specialize in creating custom WooCommerce solutions and integrating complex APIs for both B2C and B2B enterprises. We address the technical challenges that hinder the scalability of WooCommerce stores, optimizing everything from checkout efficiency and data
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Sydney, New South Wales, Au
Services Provided+1 Services
25% E-Commerce Development
15% Custom Web Application Development
10% API Development & Integration
35% Web App UI Design
AI Summary
“EUX Digital specializes in custom WooCommerce solutions and advanced API integrations, delivering scalable, high-performance ecommerce platforms with tailored plugins, UX design, hosting, and ongoing support.”
Electric Octopus
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Electric Octopus is a marketing technology engineering firm composed of 76 experts across seven international locations. The agency provides tailored, AI-driven revenue infrastructure to B2B companies with annual revenues exceeding $2 million, addressing the issue of fragmented technology solutions.
Highlights
$25,000+
Min Project Size
10-49
Employees
Yerevan, Am
Services Provided+11 Services
19% API Development & Integration
6% Legacy System Modernization
5% Account-Based Marketing (ABM)
1% Content Marketing Strategy
AI Summary
“Electric Octopus is a global marketing technology firm specializing in AI-driven, customizable revenue infrastructure for B2B clients, enhancing lead quality, attribution accuracy, and ROI through advanced engineering solutions.”
Ant Farm
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Ant Farm, we create solid architectural designs that align with your business objectives and technological requirements, guaranteeing that your software is both resilient and adaptable for future challenges. Our experience spans across startups, mid-sized firms, and large organizations, allowing
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Pune, Maharashtra, In
Services Provided+2 Services
18% Custom Web Application Development
20% API Development & Integration
8% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Ant Farm delivers expert software architecture and development, cloud infrastructure, code auditing, and strategic technology consulting to startups and enterprises, ensuring scalable, secure, and high-quality solutions.”
O'Dwyer Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Our goal is to assist our clients in creating billion-dollar enterprises by designing, developing, and deploying top-tier software that not only delights customers but also meets your existing and future business requirements.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
London, England, Gb
Services Provided+6 Services
14% API Development & Integration
7% QA & Software Testing
13% Custom Web Application Development
13% Machine Learning Model Development
AI Summary
“O'Dwyer Software develops and deploys high-quality software solutions designed to meet current and future business needs, enabling clients to build billion-dollar enterprises.”
RISEPLUS TECHNOLOGY CO., LTD.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
RISEPLUS TECHNOLOGY CO., LTD. is a software development firm with more than 10 years of experience providing customized solutions for businesses around the globe. Our areas of expertise include web application development (using Angular, Next.js, Ruby on Rails, Node.js, and Golang), mobile app devel
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
20% API Development & Integration
20% Software Development Services
20% Backend Development
20% Mobile App Development (iOS & Android)
AI Summary
“RISEPLUS TECHNOLOGY CO., LTD. excels in Software Development, providing customized web and mobile application solutions, along with API development and microservices architecture, showcasing their deep expertise and agile methodology in delivering tailored software products.”
I
interbranche Internetagentur München GmbH
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Interbranche, we develop various systems to link ERP systems with online shops. For these projects, we create custom middleware to connect with our proprietary shop system as well as popular open-source shop systems. Additionally, we have built 150 WordPress sites and 20 Magento 2 stores. As an a
Highlights
$250,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Munich, Bavaria, De
Services Provided+1 Services
20% API Development & Integration
20% Executive Search Services
20% HR Consulting Services
20% Mobile App Development (iOS & Android)
AI Summary
“interbranche Internetagentur München GmbH excels in Software Development by creating custom middleware linking ERP systems with online shops, developing mobile apps across iOS and Android, and delivering tailored web development 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

I

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.