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

UTECH
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Utech is an innovative technology group designed to assist trucking and logistics companies in boosting profits and creating new revenue streams. We are dedicated to empowering our clients to fulfill their unique goals through user-friendly and responsive software solutions. By providing accessible
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Oakbrook Terrace, Illinois, Us
Services Provided
50% Custom Web Application Development
20% Mobile App Development (iOS & Android)
30% API Development & Integration
AI Summary
“Utech delivers innovative software solutions for trucking and logistics, empowering businesses with integrated tools to enhance profitability, streamline operations, and foster growth locally and globally.”
Interactor Ltd.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Interactor Inc. is a software development firm based in Hachioji, Tokyo. We create a wide range of software solutions for small, medium, and publicly traded companies. The programming languages we utilize depend on client needs and include Java, C#, C++, PHP, Python, and JavaScript. Our frameworks e
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Hachioji, Jp
Services Provided
50% Custom Web Application Development
30% API Development & Integration
20% Mobile App Development (iOS & Android)
AI Summary
“Interactor Ltd. develops customized software solutions using diverse programming languages and frameworks for various clients, delivering firmware to web and desktop applications with flexible team models.”
Swift Hailing
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We leverage technology to effectively tackle challenging problems. Our primary objective is to create and support software applications that drive innovation throughout Africa. This includes everything from API integrations and enterprise systems to the development of web and mobile applications.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Nairobi, Ke
Services Provided
25% Custom Web Application Development
35% API Development & Integration
15% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Swift Hailing develops innovative software solutions including web, mobile, and enterprise systems, leveraging technology to drive innovation and solve complex challenges across Africa.”
MusicTech Lab
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
MusicTech Lab focuses on creating and developing digital platforms tailored for the music industry, including e-commerce solutions for virtual products like digital music and licenses, online courses, and downloadable software. Our goal is to foster the growth of the music sector by providing cuttin
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Krakow, Lesser Poland, Pl
Services Provided
30% Custom Web Application Development
30% API Development & Integration
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
AI Summary
“MusicTech Lab develops tailored software, web, and mobile solutions for the music industry, integrating AI and APIs to enhance digital commerce and innovation in music technology.”
Markoverse Labs
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Markoverse Labs assists developing businesses by providing professional HubSpot CRM setup, creating cost-effective automations, handling API integrations, managing CRM migrations, generating custom reports, and more.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
34% CRM Consulting and SI
33% API Development & Integration
33% Email Marketing & Automation
AI Summary
“Markoverse Labs specializes in professional HubSpot CRM setup, API integrations, CRM migrations, automation, and custom reporting to support growing businesses efficiently and cost-effectively.”
ArmadilCo LTD
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
ArmadilCo LTD is a consulting firm in cybersecurity that focuses on securing products in the fields of medical devices, critical systems, and financial technology. We collaborate with you to design, develop, and upkeep reliable and secure products and systems.
Highlights
$5,000+
Min Project Size
2-9
Employees
Plovdiv, Plovdiv, Bg
Services Provided
24% Cybersecurity Assessments & Hardening
10% IT Compliance & Governance
33% IT Staff Augmentation
33% API Development & Integration
AI Summary
“ArmadilCo LTD is a cybersecurity consulting firm specializing in designing, developing, and maintaining secure products and systems across medical devices, critical systems, and financial technology sectors.”
EasyAutomate
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Assists small and medium enterprises in gaining a competitive edge by automating sales, marketing, and administrative tasks. It outlines processes, assesses return on investment, and deploys AI solutions and integrations—resulting in time savings, cost reductions, and increased efficiency.
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Laziska Gorne, Silesian, Pl
Services Provided+1 Services
33% API Development & Integration
17% AI Strategy & Roadmap Consulting
7% CRM Consulting and SI
10% Custom AI Chatbot Development
AI Summary
“EasyAutomate empowers small and medium enterprises by automating sales, marketing, and administrative processes through AI-driven solutions, enhancing efficiency, reducing costs, and maximizing returns.”
Flyntech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Flyntech is a specialized boutique software consultancy focused on comprehensive .NET development and enterprise integrations. Founded and managed by an experienced full-stack .NET developer, the company provides high-quality, scalable solutions that include custom web applications and intricate int
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Velika Gorica, Hr
Services Provided
35% API Development & Integration
45% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Flyntech is a boutique software consultancy specializing in comprehensive .NET development, enterprise integrations, and scalable solutions for government, healthcare, and logistics sectors, emphasizing compliance and agile collaboration.”
Teiva Systems
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Since 2007, Teiva Systems experts have been creating business applications on the ServiceNow platform. Our offerings encompass a range of services, including: - Development of ServiceNow applications - Implementation, customization, and integration of ServiceNow solutions - Application managed serv
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Since 2007, Teiva Systems delivers comprehensive ServiceNow solutions, including development, customization, integration, and managed services, as a trusted Premier Partner.”
PolygonWeb
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Welcome to Polygonweb, your reliable ally in remote software development! In this digital era, we have transformed the conventional workplace by assembling a team of exceptional experts from across the world to provide innovative solutions customized to meet your specific business requirements.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Polygonweb is a remote software development company that assembles global experts to deliver innovative, customized digital solutions tailored to diverse business needs.”

...

...

...

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.