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.

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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

Incredible Visibility Inc.
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Incredible Visibility (IV) is a dynamic design and development firm established in 2016. Based in Florida, with development hubs in India and Brazil, our team of over 80 experts focuses on comprehensive digital solutions, including custom development and technology consulting. Key Services: Achievem
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Parkland, Florida, Us
Services Provided+7 Services
13% API Development & Integration
8% E-Commerce Development
20% Custom Web Application Development
10% Mobile App Development (iOS & Android)
AI Summary
“Incredible Visibility Inc. is a Florida-based digital design and development firm offering custom solutions and technology consulting with global expertise in India and Brazil.”
EASISTEM YAZILIM
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"We can launch applications quickly." Our company has been a part of the software industry since 2008 and is committed to looking ahead. We create software projects aimed at achieving maximum efficiency and profitability through customer satisfaction. The primary focus of all our software is to ensu
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Trabzon, Trabzon, Tr
Services Provided+2 Services
13% Mobile App Development (iOS & Android)
17% API Development & Integration
15% Custom Web Application Development
5% Legacy System Modernization
AI Summary
“EASISTEM YAZILIM develops user-friendly, efficient software since 2008, specializing in database systems, API integrations, AI projects, and collaborative application development for diverse industries.”
LiteBreeze Infotech
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LiteBreeze: Exceptional Swedish Leadership, Elite 1% Developers LiteBreeze is a Swedish web development firm with a local office in Kochi, India. Established in 2004 by David Claesson, we combine efficient Swedish leadership with the expertise of India’s top 1% developers to create high-quality, s
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Karlstad, Varmland, Se
Services Provided+2 Services
40% Custom Web Application Development
15% API Development & Integration
20% Backend Development
10% Frontend Development
AI Summary
“LiteBreeze Infotech is a Swedish-Indian web development firm specializing in custom, complex web applications with top-tier developers, emphasizing quality, clear communication, and business-focused technology solutions.”
IQONIC
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Werbeagentur, die auf wirkungsvolles Online-Marketing und anfrageoptimiertes Webdesign spezialisiert ist. Steigern Sie Ihre Online-Präsenz und Sichtbarkeit durch SEO, Google Ads und bezahlte Werbung. Optimieren Sie Abläufe und automatisieren Sie Routineaufgaben mit Software- und Webentwicklung, eins
Highlights
Nurnberg, Bavaria, De
Services Provided+1 Services
25% Search Engine Optimization (SEO)
20% Performance Marketing
5% Other Digital Marketing
30% Custom Web Application Development
AI Summary
“IQONIC is a full-service agency specializing in impactful online marketing, optimized web design, and custom software development to enhance visibility, automate processes, and improve web performance.”
Emphasoft Nordic
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We are a premier agency offering custom software development services and tailored staff augmentation solutions in Finland and around the world.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Espoo, Fi
Services Provided+1 Services
35% Custom Web Application Development
20% API Development & Integration
20% Backend Development
15% Frontend Development
AI Summary
“Emphasoft Nordic is a leading software development agency providing custom solutions and staff augmentation services in Finland and globally, delivering tailored IT expertise to diverse clients.”
Hivekind
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Transform your organization through automation and AI. We assist in automating internal processes with AI, allowing your team to reduce time spent on routine tasks and focus more on creative, impactful, and high-priority activities.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Kuala Lumpur, My
Services Provided+3 Services
15% Custom Web Application Development
10% API Development & Integration
25% Web App UI Design
13% AI Strategy & Roadmap Consulting
AI Summary
“Hivekind delivers customized software solutions integrating AI-driven automation, intuitive UI/UX design, and robust IT infrastructure support to optimize organizational efficiency and innovation.”
Zonaku Teknologi Digital
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Zonaku is an Indonesia-based digital technology firm that focuses on custom software development and web solutions. The company has assisted organizations of various sizes, from educational institutions to large enterprises, in enhancing their digital transformation using innovative, scalable, and s
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
South Jakarta, Jawa, Id
Services Provided
40% Custom Web Application Development
10% Mobile App Development (iOS & Android)
15% API Development & Integration
35% E-Commerce Development
AI Summary
“Zonaku Teknologi Digital is an Indonesian firm specializing in custom software and web solutions, enhancing digital transformation with secure, scalable, and user-focused applications for diverse sectors.”
Codeavour (Private) Limited
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We are an IT service provider with a wealth of experience in developing highly innovative technology solutions that foster scalable IT and computing environments for our clients. Our goal is to achieve outstanding results and distinguish ourselves through our extensive technical engineering expertis
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+2 Services
12% Mobile App Development (iOS & Android)
15% API Development & Integration
7% E-Commerce Development
33% CRM Consulting and SI
AI Summary
“Codeavour (Private) Limited delivers innovative IT solutions, leveraging extensive technical expertise to create scalable computing environments and achieve exceptional client outcomes with efficient execution.”
Lumora
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Lumora is a specialized educational game development studio that provides comprehensive outsourcing solutions for organizations looking to leverage play for learning. We focus on creating tailored serious games, interactive simulations, and gamified educational experiences for a diverse clientele, i
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided
35% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% API Development & Integration
10% QA & Software Testing
AI Summary
“Lumora is an educational game studio delivering tailored serious games, simulations, and gamified learning across platforms, enhancing knowledge retention and skill development for diverse clients.”
NiralSpectrum Solutions
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NiralSpectrum is an expanding IT service firm guided by seasoned professionals who specialize in Web and Cross-Platform Mobile Application Development. We have completed over 10 projects across different industries, assisting startups and businesses in creating scalable, high-performance application
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Coimbatore, Tamil Nadu, In
Services Provided
15% API Development & Integration
40% Mobile App Development (iOS & Android)
35% Frontend Development
10% Backend Development
AI Summary
“NiralSpectrum Solutions is an IT service firm specializing in web and cross-platform mobile app development using ReactJS, React Native, NextJS, and eCommerce platforms like WordPress and WooCommerce, delivering scalable, high-quality digital products.”

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Latest insights & expert perspectives

Explore data-backed surveys with inputs from top industry experts.

Minimum project sizes stated by UX audit firms listed on Edverise, with the no-minimum and $1,000 bands shaded

Vendor Selection

UX Audit Cost: Price Tables Say $8,000, Most Firms Start Lower

Agency tables put a full UX audit at $8,000 and up. 60% of 3,038 listed audit firms state a $1,000 minimum or none. Here is what to pay and what to demand.

Akash Mohapatra

11/9/2026