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

Nekot
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Nekotes es una compañía de desarrollo de software a medida y ágil que se especializa en la creación de soluciones digitales destinadas a fomentar la transformación tecnológica en empresas y startups. A través de un enfoque colaborativo y orientado al usuario, integramos diseño UX/UI, desarrollo web
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% API Development & Integration
30% Mobile App Development (iOS & Android)
35% Custom Web Application Development
10% Blockchain & Web3 Development
AI Summary
“Nekotes specializes in agile, custom software development, delivering scalable digital solutions by integrating UX/UI design, web and mobile development, and system integration to drive technological transformation.”
Tekulse
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Tekulse is a company specializing in software development and IT services, providing creative solutions for web, mobile, and enterprise systems. We prioritize quality, reliability, and customer satisfaction, assisting businesses in creating scalable products and reaching their digital objectives.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
35% Custom Web Application Development
30% Mobile App Development (iOS & Android)
25% API Development & Integration
10% E-Commerce Development
AI Summary
“Tekulse delivers innovative software development and IT services, focusing on quality and scalability to help businesses achieve digital transformation through web, mobile, and enterprise solutions.”
Compitcom Digital Solutions Pvt. Ltd.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Hello! We're the innovative team behind some fantastic online visuals. 😎✨ What We Offer: 👀 Striking Designs: We create attention-grabbing images and logos. If you want something to stand out, that's our specialty! Functional Websites: Ever visited a website that is both user-friendly and visually
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
20% API Development & Integration
15% Mobile App Development (iOS & Android)
65% E-Commerce Development
AI Summary
“Compitcom Digital Solutions Pvt. Ltd. specializes in creating striking designs, functional websites, and strategic brand promotion to enhance and grow your online presence effectively.”
Hash Coders
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Hash Coders, we provide tailored software solutions that enhance business growth. Our skilled developers are experts in creating scalable web and mobile applications, smooth API integrations, and robust POS systems. We prioritize dependability, creativity, and tangible results for clients around
Highlights
2-9
Employees
Services Provided
25% API Development & Integration
35% Custom Web Application Development
30% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Hash Coders delivers customized software solutions worldwide, specializing in scalable web and mobile applications, API integrations, and reliable POS systems focused on innovation and client success.”
AxisMerge Solutions
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At AxisMerge Solutions, we are dedicated to revolutionizing businesses with innovative technological solutions. With extensive experience in software development, web design, and digital transformation, we collaborate with organizations to create scalable applications that are prepared for the futur
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
25% API Development & Integration
15% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“AxisMerge Solutions specializes in software development, web design, and digital transformation, delivering tailored, scalable technology solutions that enhance growth, operations, and user experience for future readiness.”
slashdev SDG UG
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We provide Team as a Service, offering flexibility and the capability to swiftly adapt to dynamic environments while managing complex projects from start to finish. You can access the skills and expertise you require and pay as you use them. Our services encompass IoT solutions, MedTech, and Industr
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Berlin, Berlin, De
Services Provided+1 Services
30% Custom Web Application Development
20% API Development & Integration
20% AI Strategy & Roadmap Consulting
25% Machine Learning Model Development
AI Summary
“slashdev SDG UG offers flexible Team as a Service solutions, excelling in IoT, MedTech, and Industry 4.0 through data science, embedded firmware, and comprehensive project management.”
AppMatic Tech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Appmatic Tech is a leading force of skilled engineers specializing in the latest technologies, web solutions, and mobile design and development, providing services to clients around the globe. Our areas of expertise include: • Food Industry (enhanced customer engagement and conversion, improved coo
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
50% Mobile App Development (iOS & Android)
40% Custom Web Application Development
10% API Development & Integration
AI Summary
“AppMatic Tech delivers expert software solutions across diverse industries including food, healthcare, SaaS, social networking, and education, leveraging advanced technologies for global clients.”
Appynja
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Appynja provides a packaged service for developing mobile apps at a significantly lower cost than hiring a senior mobile developer. You won't face the lengthy hiring process or be tied down by a complicated contract. Simply click a button to access our services, and if you're not satisfied, you can
Highlights
Services Provided
85% Mobile App Development (iOS & Android)
15% API Development & Integration
AI Summary
“Appynja offers fast, affordable mobile app development services with easy access, flexible cancellation, and typically delivers new features within 72 hours, eliminating complex hiring processes.”
The Software House
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
**About Us** We assist CTOs and product teams in developing scalable software more efficiently while addressing critical delivery challenges. **Our Offer** Based in Poland, we have a team of over 300 product professionals who support software delivery for clients in the US, UK, Germany, and S
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Gliwice, Silesian, Pl
Services Provided+2 Services
35% Custom Web Application Development
20% Backend Development
15% Frontend Development
15% API Development & Integration
AI Summary
“The Software House is a Polish tech firm with 300+ professionals, delivering scalable software solutions to global clients, optimizing productivity, and meeting urgent project deadlines efficiently.”
Bimetri
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
A decade of experience in IoT, software development, and custom web-based solutions (using React.js and JSF for the frontend, and Java for the backend), along with expertise in React Native mobile app development.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Ankara, Tr
Services Provided
45% Custom Web Application Development
35% Mobile App Development (iOS & Android)
20% API Development & Integration
AI Summary
“Bimetri specializes in IoT, software development, and custom web and mobile solutions, utilizing React.js, JSF, Java, and React Native for diverse digital applications.”

...

...

...

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.