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

Vintech Software & Consultancy Service
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
About Vintech Softwares Established in 2022, Vintech Softwares is a dynamic software development agency focused on delivering secure, scalable, and maintainable digital solutions. Despite being a relatively new and rapidly expanding company, our team has over ten years of combined full-stack experie
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Rajkot, Gujarat, In
Services Provided
40% Custom Web Application Development
10% Mobile App Development (iOS & Android)
40% API Development & Integration
10% E-Commerce Development
AI Summary
“Vintech Softwares, established in 2022, delivers secure, scalable custom software and SaaS solutions, API integrations, and full-stack development for startups to enterprises worldwide.”
Macra Systems
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a well-regarded software company focused on software development. Situated on Northern Bypass at the Venus Complex, Macra Systems features a team of highly skilled professionals who excel in API development and integration, bulk SMS services, and mobile app development for both Android and iO
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% Custom Web Application Development
40% Mobile App Development (iOS & Android)
40% API Development & Integration
AI Summary
“Macra Systems is a proficient software development firm specializing in API integration, bulk SMS services, and mobile app creation for Android and iOS, staffed by expert professionals.”
Ksense Technology Group LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Ksense is a leading software development firm that focuses on crafting cutting-edge applications utilizing the latest technologies. Our team boasts more than ten years of experience in software development and is dedicated to achieving outstanding outcomes for your organization. We have a solid hist
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Salt Lake City, Utah, Us
Services Provided
55% Custom Web Application Development
35% API Development & Integration
10% Legacy System Modernization
AI Summary
“Ksense Technology Group LLC delivers innovative custom software, API integration, and enterprise modernization solutions, leveraging over a decade of experience with diverse clients including leading institutions.”
Refactor Forge
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Following the launch, many teams face rising technical debt, performance challenges, and risky deployments that hinder growth. We specialize in the post-MVP stage, enhancing existing Laravel applications to ensure they can scale without the need for expensive rewrites. Our offerings include codebase
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
60% Custom Web Application Development
40% API Development & Integration
AI Summary
“Refactor Forge specializes in scaling Laravel applications post-launch by addressing technical debt, enhancing performance, and improving deployment reliability to support sustained business growth.”
Retool Pro
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are expert Retool Application Developers with five years of dedicated experience. Our skills focus on creating both aesthetically pleasing and functional application dashboards, leveraging Retool components and workflows to improve business processes. We have effectively integrated a wide range o
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% API Development & Integration
10% Mobile App Development (iOS & Android)
35% BI & Big Data Consulting & SI
15% CRM Consulting and SI
AI Summary
“Retool Pro specializes in developing customized, efficient Retool application dashboards integrating numerous data sources and APIs to optimize business workflows and processes.”
Kleinschmidt Inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Kleinschmidt Inc. links the global supply chain by providing dependable and adaptable B2B data integration solutions, including EDI, API, and diverse format translations for industries such as logistics, retail, manufacturing, and customs. With over four decades of innovation, we offer comprehensive
Highlights
$1,000+
Min Project Size
50-249
Employees
Deerfield, Illinois, Us
Services Provided
15% E-Commerce Development
35% API Development & Integration
50% Managed IT Services
AI Summary
“Kleinschmidt Inc. offers reliable, scalable B2B data integration solutions including EDI, API, and format translation with personalized U.S.-based support, serving diverse industries worldwide.”
Logtrics Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Logtrics is a software development company renowned for its high-performance solutions that are secure, scalable, and ready for production. We collaborate with startups and established enterprises to design, develop, and enhance contemporary digital products utilizing Go, React, React Native, and AW
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% API Development & Integration
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
AI Summary
“Logtrics Technologies specializes in developing secure, scalable software solutions using Go, React, React Native, and AWS, delivering reliable, cloud-native digital products for startups and enterprises.”
QllmSoft
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At QllmSoft, we are dedicated to custom software development, AI solutions, web and mobile application creation, and API integration. This community welcomes tech enthusiasts, developers, startups, and businesses eager to maintain their edge in the digital world. What You Can Expect Here: ✅ Insigh
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% API Development & Integration
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
AI Summary
“QllmSoft specializes in custom software, AI, web and mobile applications, and API integration, fostering a community for developers and businesses embracing digital transformation and innovation.”
OrganiCode
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We prioritize creating enduring, authentic, and evolving relationships with our clients through coding. Our goal is to collaborate with you in delivering software solutions that address your challenges effectively and straightforwardly. We have developed solutions in various industries, including fi
Highlights
2-9
Employees
Services Provided
40% API Development & Integration
30% Mobile App Development (iOS & Android)
30% Custom Web Application Development
AI Summary
“OrganiCode delivers tailored software solutions across finance, freight management, and telecommunications, fostering lasting client collaborations to address diverse challenges effectively and clearly.”
Micata, inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Micata offers subscription services for development teams tailored to businesses of all sizes aiming to quickly and efficiently launch digital products. Our monthly contracts provide dedicated full-stack teams that can deliver functional products within 1.5 to 2 months, whether you're a startup crea
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Chiyoda City, Tokyo, Jp
Services Provided
33% API Development & Integration
33% Cloud Consulting & SI
20% UX Research & Usability Testing
14% Interaction Design
AI Summary
“Micata provides subscription-based full-stack development teams for businesses to rapidly build, design, and manage digital products with flexible cycles, cloud infrastructure, and strategic support across industries.”

...

...

...

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.