Top Performing Cross Platform Companies in United States

• Full-cycle expertise covering mobile, web, eCommerce, AI, software, and APIs
• Strong frontend and backend development with frameworks like ReactJS, AngularJS, VueJS, NextJS, and TypeScript
• Proven ability in React Native and cross-platform mobile apps for faster launches
• eCommerce expertise with WordPress, custom platforms, and seamless integrations
• AI focus including chatbots, ChatGPT development, and intelligent automation
• Reliable global presence paired with Ukrainian engineering talent
• Transparent communication, timely delivery, and proactive problem-solving

Project: AI-Driven eCommerce Enhancement for Alviva Group
Alviva Group partnered with Coderfy to enhance their online sales platform. The project involved developing an AI-powered product recommendation engine integrated into their eCommerce system. Coderfy combined custom API development with ReactJS for a seamless user interface and used AI algorithms to suggest products based on customer behavior. The solution improved user engagement and conversion rates. The client praised Coderfy’s flexibility, technical expertise, and proactive suggestions that added business value beyond the initial scope.

• They offer full-lifecycle app development, from discovery and roadmap through design, coding, QA, deployment, and post-launch support.
• Technical versatility: native development (Kotlin / Java / Swift), cross-platform frameworks (Flutter, React Native), AI/ML integrations, and strong backend + cloud capabilities.
• Strong quality focus: code reviews, performance optimizations, security audits, and attention to design and UX.
• Global mindset: experience with clients across multiple geographies, ability to handle timezone and cross-border collaboration.
• Responsive and client-oriented: clients often note their communication, flexibility, and professionalism.

• KidSecure (US-based project): Novumlogic built a cross-platform mobile app using Flutter for both Android and iOS. Features included real-time monitoring, alerts, parental control, screen time scheduling, secure, encrypted storage, and two-step authentication. The outcome: high user growth, good retention, reliable performance, and positive feedback from parents for enhanced child safety.
• Plantly (Marketplace App): Developed both app and seller backend, secure payment gateway, intuitive UI/UX, strong filtering and search, leading to increased engagement, more sellers, wider product range, higher download numbers, and user satisfaction.

Radixweb is trusted globally for its ability to deliver versatile, high-impact technology solutions that bridge innovation with business goals. What distinguishes the company is its holistic approach to digital transformation, combining design, development, and deployment with precision and scalability.

Their teams work closely with clients to understand both the functional and emotional aspects of digital experiences, ensuring every project delivers measurable business value.

The company’s strength lies in its cross-domain expertise, covering mobile, web, e-commerce, virtual reality, AI, and blockchain technologies. This diversity allows the company to build integrated ecosystems rather than isolated solutions, enabling clients to stay ahead in a fast-evolving digital landscape. Their emphasis on transparency, agile collaboration, and adaptive scaling ensures each project is handled with efficiency and care.

Radixweb’s design-first philosophy ensures intuitive user experiences, while their engineering depth guarantees high performance and reliability. From immersive VR solutions to secure API frameworks and AI-driven business tools, the company maintains a consistent standard of innovation and quality.

Moreover, clients value their proactive communication, quick turnaround times, and readiness to adopt new technologies, making Radixweb a long-term partner for sustainable digital growth.

Radixweb partnered with a European retail brand to build a unified online storefront integrating AI-driven recommendations and a responsive web interface. The solution increased online engagement by 40% and conversion rates by 25%. The client highlighted Radixweb’s design expertise, responsiveness, and clear communication throughout the project.

Hire NCrypted if you want a partner experienced in launch-to-scale mobile builds with template-based speed plus custom engineering where needed. Their selling points are ISO-certified processes and long experience with startup MVPs, an in-house product library (clone scripts) to accelerate time-to-market, and a portfolio of travel, edtech, and marketplace solutions - useful when you need domain best practices baked into the app. They also claim global delivery centers and ongoing support capabilities.

NCrypted lists several recognizable engagements: they developed a real-estate portal for Indiabulls and powered the original versions / booking engine for OYO (Oravel/BistroStays origin story is referenced on their site). They also delivered TeachMeNow for GEMS Education (a large e-learning rollout). These case pages highlight feature work (mobile apps + responsive web + search filters + cloud hosting) and ongoing maintenance support as key results. For historical context, NCrypted’s site documents involvement with OYO’s early product and cites BistroStays as an original platform used by Oravel.

“I’ve been working with NCrypted for over 3 years now, and they are always right there hand-in-hand for anything I need. My last experience has been incredibly quick … I will never had any bad comments or complaints with NCrypted.”
— GoguiO, Founder | Timlessther

• Deep experience in native and cross-platform app development.
• Uses modern frameworks like Flutter, React Native, Kotlin, and Swift.
• Proven process from wireframes to post-launch analytics and maintenance.
• Prioritizes app speed, usability, and secure data integration.
• Experienced in multi-industry product delivery with repeat enterprise clients.

• Expertise in Flutter and React Native.
• Focus on usability, speed, and long-term performance.
• Integrates apps with custom APIs and backend systems.
• Offers end-to-end mobile lifecycle services, from design to deployment.
• Experienced in multi-sector app delivery, including retail and enterprise mobility.

• Wide coverage of technologies, including mobile, e-commerce, VR, blockchain, software, and backend development.
• Experience across global markets with multi-industry project exposure.
• Ability to deliver end-to-end solutions from UI/UX to deployment and maintenance.
• Suitable for clients wanting one vendor for complete digital product development.
• Strong multi-stack capability enabling cross-platform delivery and integrations.

• Their mobile-first expertise influences strong, responsive web builds.
• The ability to handle both front-end and backend logic ensures cohesive, scalable websites.
• Suitable for businesses needing custom functionality rather than template-based sites.

“ClickTap engineers are very knowledgeable about the technical aspects and delivered a smooth experience.” - Verified Reviewer, Reviews.io

• Support for cross-platform development ensures a wider audience reach using shared codebases. 
• End-to-end services from ideation and design through deployment and maintenance reduce vendor hand-offs. 
• Global presence gives strong oversight for domestic clients looking for responsive project management.
• Experience across industries means greater adaptability to different mobile-app use-cases. 

• They bring a strong track record in mobile with well-documented processes from ideation through deployment and maintenance. 
• Their mobile app capability spans native and cross-platform, allowing clients to weigh cost, speed, and quality trade-offs. 
• They support startups through large enterprises and have built dozens of apps across multiple industries, offering a breadth of experience and domain insight.

Client: LOCCI (civic-engagement mobile platform) - EitBiz was engaged to rebuild the mobile application for LOCCI, overcoming issues of unoptimized and redundant code, and enabling integration of modular themes to support scalability. 

Approach: EitBiz implemented a modular architecture using React Native, TypeScript, Redux, and Material UI, streamlining performance and enabling feature expansion. 

Outcome: The redesigned app achieved improved maintainability, smoother user experience, and easier rollout of future themes/modules (specific quantitative metrics were not published). Feedback:

From client reviews, EitBiz is praised for strong communication and delivery of apps that “look and function at the highest level”.

• Skilled in native and cross-platform app development.
• Focus on UI quality, responsiveness, and app stability.
• Integrates mobile apps with backend and analytics systems.
• Experienced in startup launches and enterprise mobility.
• Offers continuous post-deployment support and updates.