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

Edify
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Edify is a cloud-based company that provides ready-made products for customer support and office communication, as well as REST APIs for developers. We incorporate machine learning and natural language processing for ongoing analysis and insights. Our platform seamlessly integrates with Salesforce a
Highlights
10-49
Employees
Carmel, Indiana, Us
Services Provided+2 Services
14% Custom Web Application Development
20% API Development & Integration
23% Machine Learning Model Development
10% Conversational AI & Voice Assistant Development
AI Summary
“Edify is a cloud-based software company offering AI-powered customer support and communication solutions, integrating platforms like Salesforce and Zendesk to unify communication channels through custom APIs.”
Coinage
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Offering IT development services
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Warszawa, Masovian, Pl
Services Provided
20% API Development & Integration
50% Blockchain & Web3 Development
20% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Coinage provides comprehensive IT development services, delivering tailored technology solutions to meet diverse client needs across various industries with professional expertise.”
Sociotrend Media Private Limited
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are an innovative IT and digital marketing firm that provides comprehensive technology solutions and data-focused marketing strategies. Our offerings range from tailored software development to SEO, social media, and performance marketing, all aimed at helping businesses expand, develop, and succ
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
20% API Development & Integration
20% Mobile App Development (iOS & Android)
10% E-Commerce Development
5% Affiliate Marketing Program Management
AI Summary
“Sociotrend Media Private Limited delivers comprehensive IT and digital marketing solutions, including custom software development, SEO, and performance marketing, to drive business growth and digital success.”
AdvantISS
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
AdvantISS assists organizations in over 10 sectors to enhance their business operations through tailored software solutions. Our dedicated team of more than 50 IT experts enables clients to achieve their business objectives more swiftly by creating high-quality innovative software, upgrading and mig
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Sumy, Ua
Services Provided+9 Services
20% Custom Web Application Development
15% Legacy System Modernization
13% API Development & Integration
3% ERP & CRM Development
AI Summary
“AdvantISS delivers comprehensive software solutions across 10+ sectors, specializing in application development, legacy modernization, cloud migration, and IT consulting with a skilled 50+ expert team.”
Coherent Solutions
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Coherent Solutions is a premier global digital engineering firm operating in 10 countries, supported by a workforce of more than 2,000 adept engineers. We leverage cutting-edge technologies, exceptional talent, and efficient processes to assist our clients in reaching their business objectives and m
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
1000-9999
Employees
Minneapolis, Minnesota, Us
Services Provided+13 Services
12% API Development & Integration
8% Legacy System Modernization
14% Custom Web Application Development
3% Conversational AI & Voice Assistant Development
AI Summary
“Coherent Solutions is a global digital engineering firm with 2,000+ engineers across 10 countries, delivering advanced technology solutions to help clients achieve business success and competitive advantage.”
Smotly
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We specialize in creating modern websites using headless solutions integrated with native AI technologies such as Medusa.js, Strapi, Next.js, and n8n. Our tech stack, which incorporates native AI, allows us to launch projects up to ten times faster and at an average cost that is 30% lower than tradi
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Champs-sur-Marne, Ile De France, Fr
Services Provided
38% E-Commerce Development
12% API Development & Integration
50% UX Research & Usability Testing
AI Summary
“Smotly specializes in rapid, cost-effective development of modern websites and web applications using headless architectures and native AI technologies, serving diverse business needs.”
eByteLogic
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
eByteLogic is your ideal technology partner, providing exceptional services in embedded systems, mobile application development, and web solutions. With over ten years of extensive experience, we have assisted businesses from diverse industries in transforming their concepts into reality through cus
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
25% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% API Development & Integration
10% E-Commerce Development
AI Summary
“eByteLogic specializes in embedded systems, mobile apps, and web solutions, leveraging over a decade of experience to deliver customized, reliable, and scalable technology services that drive business success.”
Maverickignite solutions llp
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
MaverickIgnite Solutions LLP is an AI-driven technology firm based in Bengaluru, India. We develop intelligent and scalable software solutions that assist businesses in automating processes, making data-informed decisions, and speeding up their digital transformation. Our leadership team, consisting
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
18% Custom Web Application Development
13% Mobile App Development (iOS & Android)
15% API Development & Integration
5% Legacy System Modernization
AI Summary
“MaverickIgnite Solutions LLP, Bengaluru-based AI-driven firm, delivers scalable software, enterprise solutions, AI automation, and system integration across diverse industries, enabling digital transformation and operational efficiency.”
Azat team
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are Azat, a web development team that specializes in supporting web development agencies and studios through outsourcing. We also engage directly with clients on long-term projects. Our primary technology stack includes: - Laravel - Vue/React - Yii2 - PHP - WordPress On the front end, we utiliz
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bodyke, Ie
Services Provided+2 Services
35% Custom Web Application Development
20% API Development & Integration
10% E-Commerce Development
15% Backend Development
AI Summary
“Azat is a web development team specializing in outsourcing and long-term projects using Laravel, Vue/React, PHP, and WordPress, serving fintech, edtech, logistics, and manufacturing sectors.”
Parafernalia Interativa
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a group of strategists, designers, and developers dedicated to crafting exceptional digital experiences that enhance the online growth of our clients and partners. Our team creates and provides mobile applications, web applications, and APIs that collaborate to offer comprehensive digital sol
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Rio de Janeiro, Rio De Janeiro, Br
Services Provided+3 Services
15% Mobile App Development (iOS & Android)
15% Custom Web Application Development
13% API Development & Integration
5% Backend Development
AI Summary
“Parafernalia Interativa specializes in developing integrated digital solutions, including mobile and web applications plus APIs, to drive online growth and enhance client experiences.”

...

...

...

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.