Callstack

Cross-platform engineering, built for scale We help businesses build and scale cross-platform apps - web, mobile, desktop, TV, and beyond - faster and with fewer trade-offs. Our services span Consulting, Product Development, and Enterprise Solutions, tailored to meet the needs of companies at every stage of growth.

React Universe: one model, every platform We use a single programming model - rooted in React and React Native—to build apps that run seamlessly across platforms. That means fewer silos, faster time to market, and tighter team collaboration. React, created by Meta and backed by a global open source community, has become the industry standard for building modern user interfaces. With React Native, that same model extends far beyond mobile—powering production apps on web, desktop, TVs, wearables, and more.

Engineered for the enterprise We work with engineering orgs to solve complex, cross-platform challenges at scale. Whether it’s re-architecting legacy systems or building from scratch, we help teams stay efficient, modern, and production-ready—backed by our React Native Enterprise Framework, libraries used by millions, and proven delivery across industries.

Leading the React community from the inside We're not just adopters—we help define where React Native goes next. As core contributors to the framework and maintainers of major community libraries, we lead from within. We share what we learn through OSS, and we help shape the ecosystem through events like React Conf, React Universe Conf, and the React Universe On Air podcast. If you're building modern apps and want to stay on the edge of what’s next, we're already in your orbit.