Top API Development & Integration Companies

TouchZen Media

Verified

A boutique mobile app agency based in Orange County, CA, helping startups and growing companies design, build, and scale iOS, Android, and web apps.

5.0(42)

5.0

42 reviews

We’re more than a digital agency — we work as an extension of your team. From concept to launch, we design and build products that are functional, intuitive, and aligned with your goals. Since 2014, our focus has been on crafting experiences that feel effortless and meaningful for the people who use them — delivering results that stand out for their clarity and impact.

Weelorum

Verified

AI-Powered Mobile Apps | iOS, Android, Flutter, React Native | MVP in 8 Weeks

5.0(23)

5.0

23 reviews

WHY CLIENTS CHOOSE WEELORUM: We're not just another dev shop. We use AI-assisted development to deliver your mobile app faster, with fewer iterations, and at a fraction of the traditional cost. What makes us different: • AI-Accelerated Discovery Phase: 2 weeks instead of 4, same quality, half the cost • Claude AI + Cursor integration: 3x faster prototyping and code generation • Full-cycle delivery: Design → Development → QA → App Store launch • Long-term partnerships: avg 3+ years with our clients (Digiproduct — 5+ years) INDUSTRIES WE SPECIALIZE IN: • HealthTech (HIPAA-aware): Swim-Wise AI wellness platform • FinTech (Secure Payments): Jon D. Rock financial app • Social & Marketplace: Photo Shoot, Dating apps • E-Commerce: GetBooks digital bookstore • White-label for agencies: Digiproduct (5+ years) TECH STACK: iOS (Swift, SwiftUI) | Android (Kotlin, Jetpack Compose) | Flutter | React Native Node.js | Firebase | AWS | AI/ML Integration | Claude AI | Computer Vision OUR PROCESS: 1. Discovery Phase (2 weeks) — Research, wireframes, interactive prototype 2. Design (2–3 weeks) — UI/UX, design system, animations 3. Development (4–8 weeks) — Agile sprints, weekly demos, CI/CD 4. QA & Launch — App Store optimization, release management WHAT CLIENTS SAY: "We felt like collaborators, not clients" — Co-Founder, Social Media Startup "Released the final app in just three months" — CEO, Jon D. Rock "5+ years and counting" — Founder, Digiproduct

MeanPug Digital

Verified

Loyal Marketing for Ambitious Law Firms

MeanPug Digital provides award-winning marketing to ambitious law firms. We specialize in design and branding, web development, SEO, digital advertising, legal content implementation, PR, CRM integration, custom software development, traditional media advertising, and strategic consulting for firms that want to challenge the status quo.

Mashlabz Technologies

Verified

Web & API development agency building scalable, high-performance digital solutions tailored to your business growth

Mashlabz is a web and API development agency focused on turning ideas into reliable, scalable digital products. We work with startups, growing businesses, and enterprises to design and build everything from sleek user interfaces to powerful backend systems. Our approach is simple: understand your goals first, then build with purpose. We don’t just jump into coding—we take time to analyze your business needs, plan the right architecture, and choose technologies that will support your growth long-term. Throughout the process, we keep communication clear and collaborative, so you’re always informed and in control. What makes us different is our end-to-end thinking and attention to detail. Instead of piecing together disconnected solutions, we deliver cohesive systems that are fast, secure, and built to scale. We prioritize clean code, performance, and real-world usability—so your product not only works, but stands out.

DesIDEA

Verified

Trusted technology partner delivering software solutions for over 20 years

4.8(4)

4.8

4 reviews

DesIDEA is a trusted global technology partner delivering high-impact software development and consulting services. ISO 9001 and ISO 27001 certified, DesIDEA specializes in SAP® implementations, custom application development, Web development, end-to-end QA testing, and cloud hosting and support through flexible engagement models. Leveraging deep expertise in SAP, .NET, Sitecore, Salesforce, Azure Data Engineering, RPA, and AI, DesIDEA empowers organizations with scalable, secure, and innovative solutions that reduce costs, minimize risk, and accelerate business growth.

WD Strategies

Verified

Build a Powerful Digital Footprint

We’re passionate about helping businesses tackle a variety of challenges from the initial website setup to optimizing for online visibility, conducting online advertising campaigns, developing more efficient process, and more. Our team has experts who specialize in disciplines like web design/development, software engineering, marketing, SEO, SEM/PPC, integrations, multimedia development, and different financial focuses ranging from bookkeeping to job cost analysis, financial compliance, transfer pricing issues, and strategy consulting.

DLabsAI

Verified

End-to-end AI development and data engineering with KPI-driven methodology

5.0(6)

5.0

6 reviews

We're an AI company that helps organizations implement intelligent automation and modern data infrastructure. Founded in 2015 with roots in healthcare innovation, we've completed 70+ projects across education, healthcare, retail, fintech, and more. Every project begins with thorough validation and planning to establish clear business KPIs before development starts. This approach minimizes implementation risk, maximizes ROI, and has enabled successful AI adoption for organizations ranging from global universities and enterprise clients to growing startups. Our technical expertise spans AI automation (virtual assistants, document processing, conversational AI), machine learning (NLP, computer vision, generative AI), and cloud data engineering (data warehouse migrations, lakehouse implementations, real-time analytics). We offer fixed-price projects, dedicated teams, workshops, and ongoing support—engaging with clients at any stage from validating AI feasibility to scaling existing implementations.

XAPP DESIGN

Verified

Custom Digital Marketing Solutions

5.0(7)

5.0

7 reviews

We've been developing and delivering custom digital marketing solutions since 2003! From creating our own custom ecommerce platform to CMS development like Wordpress, we can work with and connect to pretty much anything. We prioritize results by helping businesses acheive the level of success they want and finding the right technology and avenues to make it so.

Vodworks

Verified

Solving Your Technology Puzzles

5.0(5)

5.0

5 reviews

We are a global provider of end-to-end software development services. We help clients across the world use modern technology to transform challenges into lasting business value, operational efficiency, and revenue growth. With an international team of over 200 tech experts, we offer tech consulting, engineering, data, and team augmentation services. Since our inception in 2012, we have worked with numerous industry leaders and innovative startups, creating value across diverse sectors like media, telecommunications, gaming, fintech, and beyond. As a company, we are driven by a passion for advancing society through technology. We therefore also invest heavily in research and development and collaborate closely with entrepreneurs and startups to build innovative tech solutions to life.

Fulminous Software

Optimize your company with our innovative and versatile technology solutions.

5.0(59)

5.0

59 reviews

Fulminous Software is a leading web development company, mobile app development company, and custom software development company delivering cutting-edge digital solutions globally. The company specializes in end-to-end digital product development services, including software consulting, product strategy, UI/UX design services, and MVP development. Fulminous Software offers a wide range of services such as mobile app development (Android app development, iOS app development, cross-platform app development), web application development, SaaS application development, and enterprise software development tailored to diverse business needs. The company also provides advanced solutions in AI development services, machine learning development, blockchain development, IoT development, AR/VR development, and game development services. In addition, Fulminous Software excels in eCommerce development, CRM development, ERP software development, and custom business software solutions, helping startups, SMEs, and enterprises accelerate their digital transformation journey. With a highly skilled team of software developers, UI/UX designers, QA engineers, and product consultants, Fulminous Software is committed to building scalable, secure, and high-performance applications. The company follows agile development methodologies, ensuring faster delivery and continuous improvement. Known for its flexible engagement models (dedicated developers, fixed cost, hourly hiring), transparent communication, strict NDA compliance, and client-centric development approach, Fulminous Software ensures every idea is transformed into a market-ready, user-friendly, and revenue-generating digital product at competitive pricing.

High Digital

Verified

Custom Data Solutions that Drive Business Growth

5.0(20)

5.0

20 reviews

High Digital is a Cyber Essentials Plus certified and ISO/IEC 27001 accredited data first digital partner. We design, build, and deliver data first products and solutions. We adopt a collaborative and agile approach to cover all areas from product planning and design to UI/UX, development, delivery, and support. We facilitate AI adoption in businesses by creating the platform, then we can support AI and ML initiatives that add real value We have significant experience building HSE, Martech, SaaS, ESG, analytics, Bi, and logistics data products.

The Blue Box

Your partner for automate intelligently. Scale confidently. Build beyond apps.

5.0(8)

5.0

8 reviews

At The Blue Box, we believe software should reduce complexity, automate work, and create real operational leverage. We partner with companies ready to move beyond manual processes and disconnected tools. From early MVPs to scalable platforms, we design and build intelligent digital systems powered by software and AI. Our approach is simple: understand your operations, identify automation opportunities, and build solutions that support long-term growth. No unnecessary complexity. No generic development. Just systems designed to scale. We work as your digital partner, helping you streamline processes, integrate AI thoughtfully, and build platforms that evolve with your business. The company serves as a long-term product partner for startups and scaling businesses in USA and LatAm, guiding them from initial validation through launch, growth, and optimization. Our client portfolio spans regulated and high-growth sectors including SaaS, FinTech, Healthcare, LegalTech, and EdTech, with HIPAA and GDPR compliance practices enabling us to operate confidently in compliance-sensitive environments.

Goji Labs

Verified

An award-winning digital product agency that builds it right.

5.0(94)

5.0

94 reviews

For over a decade, we’ve helped leading brands launch 400+ digital products. Our expertise spans product strategy, UI/UX design, and software development. We believe no great venture should be held back by execution. That’s why we lead with strategy, work as true partners, and build products that scale. We help you define the right thing to build then design, develop, and launch it with clarity and purpose. Our partners have raised over $1B in funding—and counting.

Jett Develops

Full-Stack & AI Development Company

5.0(1)

5.0

1 review

Jett is a strategic product design and development company that goes beyond what's expected to achieve businesses' most daring goals.

Loopstudio

Secure Software Development and Design

5.0(2)

5.0

2 reviews

Welcome to Loopstudio. We are the strategic secure software development partner for businesses that harness the power of technology to create competitive advantages. Our services are designed to support companies launch secure and intuitive software, modernize legacy systems, optimize data ecosystems, and create AI initiatives that deliver ROI. For either SaaS products or business applications, we are a trustworthy and experienced technology partner that delivers high quality software. Our LATAM-based team counts with hundreds of delivered projects under our belts and over a decade partnering with US companies. We partner with CTOs, CIOs, and Product Heads to build and transform exceptional web and mobile products. OUR CORE SERVICES: - MVPs & POCs - Legacy System Modernization - AI-enabled Processes - AI Adoption Roadmap and Projects - Data Engineering / Data Environment Optimization and Modernization - Product Revamp / Redesign - Fractional CTO / Architect - High-Performance Team - Design, Development, Data, and Management

nextap solutions s.r.o

Your Long-Term Product Engineering Partner

5.0(3)

5.0

3 reviews

We’re a team of developers, designers, and product thinkers who partner with startups and scaleups to build and grow digital products that last. At NEXTAP, we don’t just write code — we become part of your journey. From MVP to millions of users, we’ve helped founders and teams scale with long-term collaboration, fast delivery, and real ownership. Over the past decade, we’ve worked with fintech companies like ClearScore and Bippit, as well as creative platforms such as Steller. We’ve grown teams from a single developer to 15+ people, delivered mobile and web products used by millions, and contributed to apps that were honored with recognition such as Apple’s Best of 2019 and the TravelTech AI Innovator 2024. Our expertise covers native iOS and Android development, modern web applications, and AI — including AI agents, content generation, and much more. No matter the stack, we care about clean solutions, maintainable code, and product decisions that make sense. Based in Czechia and working globally, we believe the best results come from building lasting relationships. We’re not just here to launch your product — we’re here to grow it with you.

Designatives

Elevating brands through strategy, design, and high-performance digital products.

5.0(7)

5.0

7 reviews

Designatives is a Budapest-based creative design and technology agency working with ambitious startups and established brands across Europe and the US. We specialize in brand identity, website design and development, UI/UX, product design, motion, and 3D — combining strategic thinking with refined execution. Our work spans Web3, technology, hospitality, education, and forward-thinking B2B companies. What sets us apart is our design-first mindset. We don’t just make things look good — we build brands and digital platforms that create clarity, authority, and long-term value. Every project is approached with deep research, iterative refinement, and close collaboration. Beyond traditional branding and web projects, we also build AI-powered systems and custom digital tools, helping companies operate more intelligently and efficiently. At Designatives, the goal isn’t to blend in. It’s to elevate beyond the ordinary.

Floating Dots

Connecting the dots between vision, product design, and custom software development behind successful web & mobile apps.

5.0(2)

5.0

2 reviews

Floating Dots is a product software development company founded in 2017, around a team of creative and enthusiastic people. Since then, we had successfully set up custom software services for companies with technological needs as well as start-ups. Our services are scalable so we can address the needs of businesses of all sizes. We are defined by our curiosity and passions. That’s why we are striving to ensure the high quality of the solutions we develop. The industries in which we have a deep understanding of the complexity of business processes are: - Education - Retail (e-commerce) - HR - Finance - Manufacturing - Healthcare - Social - Consumer products - Hospitality & Leisure We cover a complete set of services and abilities for for all stages of the software products lifecycle: - Web Development - Mobile Development - UI & UX Design - DevOps - Quality Assurance - Business Analysis - Technical Support Managing all the stages of the software lifecycle is what we do to ensure the success of your ideas: - ideation - architecture - design - development - quality assurance - operations - support

April Innovations

Verified

Full Stack Enterprise App Development Company

5.0(1)

5.0

1 review

We are a full stack software engineering company with focus on Banking and Fintech applications. We have serviced clients in USA, UK and India. Our core areas of expertise are Enterprise Apps, Artificial Intelligence, Mobile Apps, E-Commerce, Platforms. We have worked on projects that has half a million users and have delivered projects with Bank level security. We prefer to work on micro teams model where we build a micro team for each of our client that acts as an extended tech team for the client.