React vs Solid: Virtual DOM or Fine-Grained Reactivity?

Background

React and SolidJS share a familiar JSX syntax, which makes the transition look straightforward at first glance. Under the hood, they differ fundamentally. React re-renders entire components on every state change, then uses a virtual DOM to compute the minimal set of actual DOM operations. Solid, by contrast, applies fine-grained reactivity where signals are directly wired to specific DOM nodes. This means Solid never re-executes a component function after its initial run. The difference becomes most apparent in applications with frequent data updates and complex UIs, where Solid consistently uses less CPU time. In 2026, this architectural distinction remains relevant as React attempts to close the performance gap through the React Compiler.

What are the key differences between React and SolidJS?

When to choose which?

What is the verdict on React vs SolidJS?

React remains the undisputed standard for frontend development in 2026, offering the largest ecosystem, the broadest talent pool, and continuous innovation through Server Components and the React Compiler. For the vast majority of projects, React is the safe and productive choice. SolidJS delivers objectively better runtime performance and a smaller bundle through fine-grained reactivity that eliminates the need for a virtual DOM. In benchmarks, Solid is consistently faster, and many developers find its reactive model more elegant. However, the ecosystem is significantly smaller, which limits its viability for enterprise projects that depend on third-party integrations. The decision comes down to priorities: if you value the largest ecosystem and broadest support, React wins. If runtime speed is the top priority and you can work with a smaller ecosystem, SolidJS is the technically superior option.

Which option does MG Software recommend?

At MG Software, React is our primary UI framework. The seamless integration with Next.js, TypeScript, and the vast library ecosystem allows us to ship high-quality applications efficiently. We follow SolidJS developments with genuine interest, particularly because Solid's fine-grained reactivity has inspired React's own evolution through the React Compiler and Signals proposals. For client projects, we recommend React unless there are demonstrable performance requirements that Solid addresses better, such as real-time dashboards handling thousands of concurrent DOM updates. In those cases, we evaluate SolidJS as a serious alternative. The investment in the React ecosystem consistently pays off through faster development, simpler maintenance, and a wider pool of qualified developers to draw from.

Migrating: what to consider?

Migrating from SolidJS to React requires rewriting reactive primitives: createSignal becomes useState, createEffect becomes useEffect, and Solid stores are replaced by a state management library of your choice. Although the JSX syntax looks similar, the reactive model is fundamentally different. React components re-execute on every state change, while Solid components run only once. This means conditional logic and loops need restructuring. Migrating in the opposite direction involves similar effort. Plan 2 to 5 months depending on project size, and start by migrating shared utilities before tackling component-level rewrites.