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

EVOCODE
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
EVOCODE is a comprehensive custom software and web development company located in Prague. For over seven years, we have effectively assisted small and medium-sized enterprises in sectors such as automotive, real estate, logistics, fintech, and legal in creating high-quality, cost-efficient custom so
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Prague, Prague, Cz
Services Provided+1 Services
10% API Development & Integration
20% Custom Web Application Development
13% Backend Development
7% Frontend Development
AI Summary
“EVOCODE is a Prague-based software development firm delivering custom, cost-efficient IT solutions, consulting, and automation services for SMEs across diverse industries, ensuring transparency and expertise.”
Pell Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
• Entirely US-based— Our staff is full-time and never outsourced • Direct Collaboration between Clients and Engineers— No more miscommunications • Focused on Long-term Partnerships— Work directly with software engineers • Over 90 Perfect 5-Star Ratings— Exceptional service and support • Pre-
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Denver, Colorado, Us
Services Provided+2 Services
20% Custom Web Application Development
13% API Development & Integration
7% Legacy System Modernization
10% E-Commerce Development
AI Summary
“Pell Software delivers custom AI-driven business software with US-based engineers, emphasizing direct client collaboration, long-term partnerships, and cost-effective pre-built templates for optimized workflows.”
Vision Infotech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Vision Infotech is a global IT solutions provider that has been operating since 2012. With over 11 years of experience, we focus on offering straightforward and sustainable solutions by leveraging the latest technologies. Our mission is to assist high-potential businesses in improving their efficien
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Surat, Gujarat, In
Services Provided+2 Services
18% Custom Web Application Development
15% Mobile App Development (iOS & Android)
12% API Development & Integration
5% ERP & CRM Development
AI Summary
“Vision Infotech, established in 2012, delivers comprehensive IT solutions including software and web development, specialized integrations, and staff augmentation to enhance business efficiency and scalability.”
Pixels and Grids
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Welcome to Pixels and Grids, a specialized web development agency with over two years of experience in crafting high-quality web applications and dashboards. Our proficiency in Next.js, Tailwind CSS, TypeScript, and MongoDB allows us to provide robust, scalable solutions tailored to your business re
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
40% Custom Web Application Development
20% API Development & Integration
15% SaaS Product Development
10% E-Commerce Development
AI Summary
“Pixels and Grids is a skilled web development agency specializing in scalable web applications, SaaS platforms, and data-driven dashboards, leveraging modern technologies for tailored digital solutions.”
Draco Servicios
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Draco Servicios es una empresa enfocada en la transformación digital y en ofrecer soluciones tecnológicas que fomentan el crecimiento, la eficiencia y la innovación. Creamos, desarrollamos e implementamos soluciones que optimizan las operaciones, automatizan procesos y enriquecen la experiencia tant
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bogota, Bogota Capital District, Co
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% AI Agent & Multi-Agent System Development
AI Summary
“Draco Servicios specializes in digital transformation, delivering technological solutions that enhance operational efficiency, automate processes, and improve experiences across diverse industries.”
Aadhi Global Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Since 2013, AGT has been a leader in Software and Embedded systems development. Based in Chennai, we focus on providing advanced solutions for a wide range of industry sectors. Discover our offerings, which include everything from application development to extensive IT consulting, designed to addre
Highlights
10-49
Employees
Chennai, Tamil Nadu, In
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% Cloud Consulting & SI
AI Summary
“Aadhi Global Technologies, established in 2013 in Chennai, specializes in software and embedded system development, offering tailored IT consulting and application development across diverse industries.”
Travo Byte
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Travo Byte is a travel tech firm focused on providing Travel CRM solutions and developing websites for travel agencies and tour operators. Our platforms streamline lead management, bookings, itineraries, and customer communication, enabling travel businesses to automate their operations and grow eff
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
New Delhi, Delhi, In
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% CRM Consulting and SI
AI Summary
“Travo Byte delivers travel technology solutions including CRM platforms and website development to help travel agencies and tour operators automate operations, manage leads, bookings, and enhance customer communication.”
Alchemy Consulting Group
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Alchemy Group, we develop software solutions tailored to your specific requirements, placing users at the forefront. Say goodbye to the hassle of entering the same information in multiple locations and the mismatch often seen with generic apps designed for a wide audience. Our philosophy is "We u
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
La Verne, California, Us
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% Other IT Consulting and SI
AI Summary
“Alchemy Consulting Group delivers tailored software solutions that integrate smoothly with existing systems, enhancing productivity, customer service, and business workflows across diverse industries.”
Inxptk
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Insonix, we focus on simplifying complex situations into manageable tasks and prioritizing them for action. By effectively integrating state-of-the-art technology solutions with your current systems, we enable you to scale quickly and realize technology's full potential. In this era of technologi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Pathankot, Punjab, In
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% Web App UI Design
AI Summary
“Insonix specializes in integrating advanced technology with existing systems to simplify complex challenges, enabling rapid business scaling and unlocking IT potential since 2010.”
ECJ Technology
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
ECJ Technology is a fully Australian owned and operated company located in Sydney that specializes in internet and application development. We provide a wide range of technology solutions, starting from initial consulting and solution design, continuing through development, implementation, and ongoi
Highlights
$5,000+
Min Project Size
2-9
Employees
Woolloomooloo, New South Wales, Au
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% Workflow Automation (Zapier / Make / n8n)
AI Summary
“ECJ Technology is an Australian company providing comprehensive consulting, custom software, web applications, and digital automation services, focused on aligning technology solutions with business growth strategies.”

...

...

...

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.