October 2, 2025

Top eCommerce App Development Companies (and What to Look For)

In this article, we’ve highlighted some of the top eCommerce app development companies shaping the industry today, including our own approach at Big Human. Whether you’re just starting to explore app development or looking to level up your current platform, these insights will help you choose the right team to bring your vision to life.

Why eCommerce Mobile App Development Matters

An eCommerce website alone isn’t enough anymore. Users expect instant access, seamless checkout, and personalized experiences from their phones.

Leading mobile app development companies start with the essentials — frameworks like React Native or Flutter that support payment gateways, CRMs, and APIs for smooth, connected experiences. Then they add custom design and strategy to bring your eCommerce app to life.

At Big Human, we’ve seen how the right app can transform a business — driving higher conversion rates, stronger retention, and a branded experience that stands out. Well-built eCommerce stores don’t just support sales, they scale with demand and become key drivers of measurable growth.

How Did We Choose the eCommerce App Development Companies on This List?

Simple: We know what it takes to make an online store succeed. The agencies below may be competitors, but recognizing how other teams push the boundaries of great eCommerce design and development is part of how we test the limits of our innovation.

Top eCommerce App Development Companies

1. Big Human

Okay — we’re biased. But we’ve earned this spot: Our eCommerce app development services go beyond building apps. Our human-first approach grounds every project in user research, brand strategy, and thoughtful UX design. Every storefront feels intuitive, engaging, and built to convert.

As a full-service eCommerce app development agency, we manage everything in-house, from product strategy to React Native development and long-term support. That end-to-end expertise means faster collaboration, consistent quality, and apps that scale seamlessly across iOS and Android apps. We pair brand-driven visuals with reliable engineering, resulting in products that look sharp and handle real-world demands like inventory management, checkout flows, and high-traffic scalability.

Our partnerships don’t end at launch, either. We provide ongoing support and optimization to keep apps aligned with evolving expectations and new technologies.

Notable Clients:

Chelsea Piers Fitness: We reimagined the Chelsea Piers Fitness app to capture the brand’s premium, high-energy experience. Our team rebuilt the app’s architecture from the ground up, introducing features like seamless class scheduling, café ordering, and credit management that cut friction from everyday member interactions. Beyond functionality, we elevated the user experience with bold visuals, responsive layouts, and intuitive navigation as sleek as the brand’s state-of-the-art facilities.
Fusion Worldwide: Fusion Worldwide, a global distributor of electronic components, needed an eCommerce platform capable of handling a complex inventory and customer base. We built a scalable eCommerce system with smarter navigation, faster search, and a streamlined checkout process, all while refreshing the company’s brand identity for a worldwide debut at electronica 2024.

2. Appinvetiv

AppInventiv builds end-to-end eCommerce apps for brands worldwide, focusing on customized solutions optimized for speed, performance, and conversion. They emphasize full-cycle delivery and layer in technologies like machine learning, AR, and real-time scalability features tailored to diverse business models.

Notable Clients:

Adidas: Appinventiv helped Adidas expand its mobile footprint specifically in Saudi Arabia and Qatar by turning their web-centric model into an app. The project included deep localization, support for multiple currencies, complex animations, and engaging landing content. The result: over two million downloads on the App Store.
6th Street: AppInventiv tackled app performance issues with a user-centric redesign for 6th Street, a UAE fashion startup. The eCommerce app development company rebuilt critical modules, restructured product listings, tiled in social media-based shopping features, and optimized load times.

3. Fantasy

Fantasy also earned a nod on our list of best digital product design agencies. The company focuses on crafting high-performance eCommerce experiences with speed, relevance, and simplicity while eliminating friction and fragmentation for users. Their approach blends bold design with smart system logic to deliver conversion-driven customer journeys across devices.

Notable Clients:

Kohler: Fantasy partnered with Kohler to elevate its digital commerce experience. The work combined strategic design and seamless integration to create a platform that made product discovery faster and purchasing smoother.
Harrods: The ecommerce app development company also worked with Harrods, a luxury department retailer in the UK. Fantasy helped Harrod’s rethink its digital presence by translating the luxury brand’s sophisticated retail identity into a clean, consistent app experience.

4. Apptunix

Apptunix is an established development company with years of experience. They aim to deliver end-to-end mobile solutions that emphasize scalability, user engagement, and innovation. Their portfolio showcases a diverse range of projects, using emerging technologies such as AR/VR, AI-powered automation, and cloud-native architectures to enhance user experiences and efficiency.

Notable Clients:

Vrbo: Apptunix developed a travel app for Vrbo, the popular vacation rentals brand. The app provides users with a streamlined experience for booking accommodations. It features user-friendly interfaces, secure payment gateways, and real-time booking confirmations.
Expo City Eats: In collaboration with Expo City Dubai, Apptunix created a food delivery app named Expo City Eats. This platform facilitates on-demand food ordering and delivery within the Expo City grounds, catering to the needs of both guests and residents.

5. Trango Tech

Trango Tech is another seasoned eCommerce app development company. Their services encompass custom eCommerce solutions, backend and frontend development, CRM integration, and cross-platform functionality on iOS and Android apps.

Notable clients:

SuperFlex: Trango Tech developed SuperFlex’s app to transform the parcel delivery business into a multi-vendor marketplace. The app enables commission-based transactions, registration fees, and transaction fees.
Altras: Trango Tech implemented a comprehensive fitness and wellness platform. From tracking workouts to managing wellness programs, the app combines an intuitive design with robust backend features to keep everything running smoothly.

What to Look for in an eCommerce App Development Company

Not all eCommerce app development companies are created equal. The right partner understands your business, your users, and your goals. From seamless UX to scalable architecture, and secure payment systems to long-term support, every detail counts.

Here’s what to prioritize when choosing a team that can turn your app idea into a high-performing, user-friendly reality.

Their Portfolio and Case Studies Match Your Business Goals

Look beyond flashy screenshots and pay attention to the problems each software agency has solved. A strong portfolio shows polished design, thoughtful strategy, smooth cross-platform functionality, and measurable results. If they’ve delivered Android and iOS apps that scale, engage users, and boost conversions, that’s a good sign they can do the same for your business.

They Consider Both UI and UX Design

An eCommerce app won’t convert if it feels clunky or confusing. Design is what guides your users from discovery to checkout. Great UI/UX design doesn’t just look polished; it reduces friction, builds trust, and keeps customers coming back.

When evaluating eCommerce app development companies, look at how they approach user research and prototyping. Do they test designs with real users before launch? Can they simplify navigation for complex product catalogs or streamline checkout flows to prevent cart abandonment? At Big Human, this is core to our process.

As 1800wheelchair CEO Joseph Piekarski shared, “Big Human did an amazing job with the refresh of our brand and the complete redesign of our eCommerce website. The team was consistently easy to work with, responsive, and always game to innovate and find new ways to communicate our brand to the audience.”

They Have Technical Expertise (and Can Communicate It)

Great design will draw users in, but technical execution is what keeps them there. An eCommerce app lives or fails by its tech stack. The best agencies know how to balance clean frontend experiences with robust backend engineering. This ensures your eCommerce app can handle real-world challenges like high-traffic sales, multi-currency transactions, or complex product catalogs with real-time inventory management and dynamic pricing.

Essentially: does the agency have the technical ability to bring your vision to life?

An experienced team should also be able to present technical decisions in plain English, connect those choices back to your business goals, and streamline inevitable issues. That’s how you know you’re working with partners, not just software developers for hire.

They Provide Post-Launch Support and Scalable Solutions

Launching your eCommerce app shouldn’t be the end of the partnership. The real test comes when user traffic spikes, new devices roll out, or your business pivots into fresh markets. A strong development partner sticks around to optimize, troubleshoot, and keep your app aligned with new tech and customer expectations.

Post-launch support ensures you’re not scrambling when issues arise, and scalable architecture future-proofs your investment. The right agency builds with growth in mind, making it easy to add new cutting-edge features, integrate third-party tools, and handle traffic changes from seasonal surges to global expansion.

Choose Big Human as Your eCommerce Business Partner

The right eCommerce app development company does more than check boxes; it builds with vision. You need a partner who can bring strategy, design, and engineering together in a seamless process that drives growth and keeps customers coming back.

At Big Human, we create digital storefronts that scale with your business, engage users, and make your brand impossible to ignore. From initial product strategy and UX design to ongoing optimization and bug fixes, we stay with you every step of the way to ensure your app keeps performing as your needs evolve.

Ready to transform your eCommerce experience? Let’s build something extraordinary together.