What Is SolidJS? Comparing SolidJS vs React vs HTMX (2026)

You've built something in React, heard SolidJS is faster, and seen HTMX showing up everywhere on developer Twitter. Now you're trying to figure out which one belongs in your next project. The SolidJS vs React debate has been running for a few years, but the HTMX vs SolidJS question is newer, and the answer depends less on benchmarks than on what kind of app you're building.

This guide covers how all three work, where each one wins, and a concrete decision framework for picking the right one.

SolidJS vs React vs HTMX: Quick Comparison

The table tells most of the story, but the nuance matters. Each tool solves a different problem. The SolidJS vs React and HTMX vs SolidJS comparisons below go deeper on the tradeoffs that the table can't capture.

What Is SolidJS?

Understanding SolidJS on its own terms makes both the SolidJS vs React and HTMX vs SolidJS comparisons clearer later.

SolidJS is a declarative JavaScript library for building user interfaces, created by Ryan Carniato. Its core idea is fine-grained reactivity: when state changes, only the exact Document Object Model (DOM) nodes that depend on that state update. No component re-runs, no virtual DOM diffing, no reconciler. The compiler converts reactive code into precise DOM manipulation instructions at build time.

If you know React, SolidJS feels familiar immediately. It uses JSX (JavaScript XML), has components, and has an equivalent for every React hook. The mental model shift is that a SolidJS component function runs exactly once. All reactive behavior comes from signals, not from re-execution of the component.

SolidJS vs React: How They Actually Differ

This is the comparison most developers need first, because React is the default most teams are coming from. The SolidJS vs React decision often comes down to three things: rendering model, state ergonomics, and ecosystem depth.

The Rendering Model

React builds a virtual copy of the DOM in memory. When state changes, it re-renders the component, diffs the new virtual DOM against the previous version, and applies the minimum changes to the real DOM. This reconciliation process adds overhead proportional to how complex the component tree is and how frequently state changes.

SolidJS skips reconciliation entirely. During compilation, it analyzes which DOM nodes depend on which signals and generates direct update instructions. A signal change triggers a targeted DOM write, nothing more. This is why SolidJS consistently outperforms React in benchmarks involving frequent or fine-grained updates.

State Management

React manages state with hooks. useState triggers a full component re-render on every setter call. Managing performance means reaching for useMemo, useCallback, and carefully declared useEffect dependency arrays, which are the source of most React performance bugs in production.

SolidJS uses signals as its state primitive:

import { createSignal } from 'solid-js';

const [count, setCount] = createSignal(0);
// Only DOM nodes reading count() update when setCount is called

Effects in SolidJS automatically track their reactive dependencies by watching which signals are read during execution. No dependency arrays to declare, no stale closure bugs.

import { createEffect } from 'solid-js';

createEffect(() => {
  console.log('Count is now:', count());
  // Re-runs automatically when count() changes
});

Memos cache derived computations and only recalculate when upstream signals change:

import { createMemo } from 'solid-js';

const doubled = createMemo(() => count() * 2);

Performance

The SolidJS vs React performance gap is most visible in:

• Lists and tables with frequent updates

• Real-time data (dashboards, feeds, collaborative tools)

• Animations and high-frequency state changes

• Large component trees where React re-renders propagate unnecessarily

For standard CRUD applications, marketing sites, and typical SaaS dashboards, the difference is not something users will notice. The SolidJS vs React performance advantage matters at scale or in frame-budget-sensitive UIs where every millisecond counts.

Ecosystem

This is where React wins decisively. Every major design system, every third-party library, and most hiring pools assume React. SolidJS has solid routing via solid-router, a meta-framework in SolidStart, and a growing community, but you'll hit gaps that simply don't exist in the React ecosystem.

If you need a specific library that only has a React version, that often resolves the SolidJS vs React question before anything else does.

SolidJS vs React: When to Choose Each

Choose SolidJS over React when:

• You're starting a greenfield project where performance is a core requirement

• You're building real-time UIs, data visualizations, or collaborative tools

• Your team is comfortable with a short reactive model learning curve

• Bundle size matters and you want minimal runtime overhead

Stick with React when:

• You're working in an existing React codebase

• Your team is React-fluent and the project timeline is tight

• You need ecosystem depth (specific libraries, hiring, community)

• You're building a standard content site or SaaS app where React's performance is more than adequate

HTMX vs SolidJS: A Different Kind of Comparison

Comparing HTMX vs SolidJS is less straightforward than SolidJS vs React, because they solve fundamentally different problems. HTMX is not a JavaScript framework in the same sense. It's a library that extends HTML with hypermedia attributes, letting your server return HTML fragments in response to user interactions. The HTMX vs SolidJS question is really asking: should your application logic live on the client or the server?

How HTMX Works

HTMX adds attributes like hx-get, hx-post, and hx-swap to HTML elements. When a user clicks a button, HTMX sends a request to the server and swaps the returned HTML into the DOM. Your server does the work; the browser renders what it receives.

<button hx-get="/api/count" hx-target="#counter" hx-swap="innerHTML">
  Get Count
</button>
<div id="counter">0</div>

No JavaScript Application Programming Interface (API) calls in your frontend code. No client-side state management. No component re-renders. The server owns the state; HTMX handles the plumbing between the server response and the DOM.

HTMX vs SolidJS: Where Each One Wins

HTMX wins when:

• Your app is primarily content-driven with occasional interactivity

• You're a backend developer who wants to add interactivity without writing a full JavaScript frontend

• Your server already holds all the state and you want to keep it there

• You're building forms, admin dashboards, content management interfaces, or e-commerce flows

• You want the smallest possible JavaScript footprint on the client

SolidJS wins when:

• Your app needs rich client-side interactivity: drag-and-drop, real-time collaboration, complex animations

• State changes frequently and needs to update multiple parts of the UI simultaneously

• You're building a single-page application (SPA) where server round-trip latency would degrade the experience

• Your team is already comfortable in JavaScript and wants to stay in that model

The Real Tradeoff in HTMX vs SolidJS

HTMX trades client-side complexity for server-side simplicity. Every interaction that requires a state change needs a server round-trip. On fast connections this is often imperceptible; on slow connections or high-latency APIs, it shows.

SolidJS trades server simplicity for client-side power. You get instant, offline-capable, richly interactive UIs, but you're now responsible for managing state on the client, which adds complexity that HTMX sidesteps entirely.

Neither choice is wrong. The HTMX vs SolidJS decision comes down to where your app's complexity actually lives, and which side of the stack your team is stronger on. Most developers who have worked through the HTMX vs SolidJS choice land on HTMX for content-heavy projects and SolidJS for anything that needs persistent client-side state.

Three-Way Decision Guide

If you're still weighing all three, use this:

Pick SolidJS if: You're building a performance-critical SPA, real-time dashboard, or collaborative tool where frequent state changes and complex client-side interactions are the core of the product. You want the smallest bundle with the highest rendering performance.

Pick React if: You need ecosystem depth, team familiarity, or access to a specific library. You're building a standard SaaS product, marketing site, or anything where React's massive community and tooling investment matters more than raw performance.

Pick HTMX if: Your interactivity is relatively simple (forms, toggles, pagination, live search), you're a backend-first team, or you want to ship a production-quality interactive UI without committing to a JavaScript framework. HTMX pairs especially well with Python, Go, Ruby, and Elixir backends.

Code Comparison: The Same Feature in All Three

Here's a simple counter in each library to make the model differences concrete. The HTMX vs SolidJS gap becomes obvious here: one manages state on the server, the other on the client.

SolidJS

import { createSignal } from 'solid-js';

function Counter() {
  const [count, setCount] = createSignal(0);
  return (
    <div>
      <p>Count: {count()}</p>
      <button onClick={() => setCount(count() + 1)}>Increment</button>
    </div>
  );
}

The component function runs once. Every subsequent update writes directly to the <p> node.

React

import { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);
  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={() => setCount(count + 1)}>Increment</button>
    </div>
  );
}

The full component re-renders on every click. React's reconciler ensures only the changed DOM node actually updates, but the entire component JavaScript still executes.

HTMX

<!-- Server returns an updated <p> tag on each POST -->
<p id="count">Count: 0</p>
<button hx-post="/increment" hx-target="#count" hx-swap="outerHTML">
  Increment
</button>

No client-side state. The server maintains the count and returns an updated <p> tag on every POST. Simple and clean, but requires a server round-trip on each click.

Running a Blog on Your Stack

If you're building on any of these stacks and need a blog that doesn't require building a Content Management System (CMS) from scratch, Wisp is worth a look. It's a headless blog CMS built specifically for Next.js and React frontends, with a Content Application Programming Interface (API) and JavaScript Software Development Kit (SDK) that connects to your existing app. Writers get a Notion-style editor with no Markdown required; developers get clean API responses delivered via a global Content Delivery Network (CDN).

Wisp supports custom React components inside posts, AI-powered contextual CTAs, and semantic related post suggestions. The Next.js Starter Kit gets a blog running in minutes. The free plan includes unlimited blogs and posts, so there's no commitment to try it alongside whatever stack you're building on.

FAQ

Is SolidJS faster than React?

In most benchmarks, yes. SolidJS avoids the virtual DOM reconciliation step that React performs on every state change, and its compiler generates direct DOM update instructions at build time. The SolidJS vs React performance gap is most visible in applications with frequent or fine-grained updates: dashboards, real-time feeds, large lists. For typical CRUD apps and marketing sites, both are fast enough that users won't notice a difference.

Is HTMX vs SolidJS even a fair comparison?

Not exactly. HTMX and SolidJS operate at different levels of the stack. HTMX is a hypermedia library that keeps state on the server; SolidJS is a client-side JavaScript framework that manages state in the browser. They're complementary tools for different architectures, not direct competitors. Some projects even use both in different parts of the same application.

Can I use HTMX with React or SolidJS?

Technically yes, but it's rarely the right call. Mixing HTMX with a client-side framework means managing two competing models for where state lives. Most projects should pick one approach and commit to it.

Is HTMX a replacement for React?

For some projects, yes. If your app is primarily content-driven with relatively simple interactivity (forms, search, pagination, toggles), HTMX can replace a React frontend entirely with less JavaScript and simpler architecture. For rich, stateful single-page applications, HTMX's server round-trip model becomes a limiting factor.

How hard is it to learn SolidJS if I already know React?

The JSX syntax and component structure are nearly identical, so the surface-level transition is fast. The real adjustment in the SolidJS vs React shift is the reactivity model: SolidJS components run once rather than on every state change, and you read signal values by calling them as functions (count() not count). Most React developers are productive in SolidJS within a few days, though fully internalizing the reactive model takes longer.

Does SolidJS have a meta-framework like Next.js?

Yes. SolidStart is SolidJS's official meta-framework, covering server-side rendering, file-based routing, and API routes. It's the SolidJS equivalent of Next.js, though the ecosystem and community around it is smaller. If you need the full Next.js feature set and ecosystem maturity, React remains the stronger choice.

Is HTMX good for SEO?

HTMX works well with server-rendered HTML, which is inherently SEO-friendly. The initial page load contains all the content search engines need to index. Dynamic updates via HTMX replace HTML fragments after that initial render, which generally does not affect crawlability. For SEO-sensitive projects, HTMX's server-first model is often a stronger starting point than a fully client-rendered SPA in React or SolidJS.