Spline alternatives: 9 ways to put 3D on a website

The best Spline alternatives depend on where you want the 3D to be made. If you write code, Three.js with React Three Fiber replaces Spline outright. If you sell physical products, Vectary or Google's model-viewer fit better. If you want a visual editor on an open engine, PlayCanvas is the closest match. And if the 3D is only there to make a marketing page look cinematic, you may not need a 3D runtime on the page at all.

That last case is worth checking first. A camera move that every visitor sees the same way is a film, and a film or a cut-out render ships as a video or an image, which every browser already knows how to show. That is where Thanor, a library of website designs with full prompts, fits among the nine below.

Spline itself is a browser-based 3D design tool where teams model, animate and ship interactive scenes together, and it is very good at what it does. There are four good reasons to look elsewhere: you want to own the runtime, you need a configurator or AR, you want the result written as code an AI model can extend, or per-seat pricing is hard to justify for one hero object.

How these alternatives were compared#

Every fact below was read on the vendor's own site, documentation or pricing page on 9 November 2026. No benchmarks were run, so nothing here claims one engine is faster than another. Each tool was judged on five questions that decide whether it can replace Spline on a real website:

1. Where the 3D is made. In code, in a visual editor, or by an AI model from a written specification.
2. What ships to the visitor. Who owns the runtime, and whether you can host it yourself.
3. What the free plan leaves out. Watermarks, export limits and commercial use.
4. What it costs at the time of writing, from the vendor's own page, per seat where the vendor bills per seat.
5. What happens on a phone. Whether the tool documents a lighter path for small screens.

The fifth question is the one Spline's own documentation takes seriously. Its optimization guide recommends fewer than three lights per scene, no more than three subdivision levels, and one or two embeds per page.

What Spline is good at, and what people chase with it#

Spline's strengths are real. It models with primitives, booleans and sculpting, generates 3D from text or an image on paid plans, adds states, events and physics without code, and lets several people edit one file at once. It exports a public URL, a <spline-viewer> web component that lazy-loads by default, or, on Pro, code for vanilla JavaScript, Three.js, React, Next.js and react-three-fiber, according to its export documentation.

On a marketing page, most scenes chase one of two looks: a charming 3D character, or a hero product that moves as you scroll. Both can be built without a live scene at all.

Grumps swaps four still renders on a turntable and floods the screen with each toy's color. Palenque moves one transparent WebP from section to section. Neither needs Spline, Three.js or a GPU budget, and both read as 3D. When the visitor does need to turn the object, the nine tools below are the honest options.

The nine alternatives at a glance#

Prices are the lowest paid tier shown on each vendor's page at the time of writing. Spline is included as the reference row.

Three.js and React Three Fiber: best for full control#

Three.js is the long-standing open-source JavaScript 3D library, MIT licensed, at release r187 since 30 October 2026, with a WebGPURenderer that falls back to WebGL 2. React Three Fiber renders Three.js from React components; v9 pairs with React 19, and drei adds helpers such as useGLTF and Environment. Spline's own code export targets both, which makes this the natural place to land.

• Pros: free for any use, the largest ecosystem, and every major AI model writes it fluently.
• Pros: the runtime is yours, so nothing ships that you cannot read.
• Cons: there is no Spline-style editor; the scene is code, and so is every performance decision.
• Cons: for timeline animation you need another tool. Theatre.js was the usual one, but its last public release, 0.7.2, dates from May 2024.

Versus Spline, you trade the editor for ownership. A scene that takes an afternoon in Spline's editor takes longer to write, but an AI model can write most of it when the brief states the camera, light and material as values, and the result is code you own outright, with nothing billed per seat.

Pricing: free. If you are rebuilding a scene with AI, the values a model needs are in how to make a 3D website with Claude, and finished sites built this way are in Three.js website examples.

Babylon.js: best complete engine for app-like 3D#

Babylon.js is a web rendering engine licensed Apache-2.0. Version 9.0 was announced in March 2026 on the Windows Developer blog, and WebGPU has been supported since 5.0, according to its documentation. It comes with a browser Playground, a Node Material Editor and a free, open-source desktop Babylon.js Editor for Windows, macOS and Linux.

• Pros: the tools come with it, from the Node Material Editor to Gaussian splat support, and it is free for commercial use.
• Pros: the desktop editor gives designers a place to work without code.
• Cons: its tooling leans toward applications and games, so a simple marketing hero can feel like more engine than the job needs.
• Cons: the visual editor is a desktop app; in the browser you get the Playground, which is code.

Versus Spline, Babylon.js asks for code where Spline asks for clicks, and gives back an engine that does far more than display a scene, with nothing billed per seat. For a team that has outgrown Spline's states and events, it is the step up rather than the step sideways.

Pricing: free. Choose it over Three.js when the 3D is an application, such as a viewer, a configurator or a training tool, rather than a hero.

PlayCanvas: best visual editor on an open engine#

PlayCanvas pairs an engine that is open source under MIT with a collaborative editor hosted in the browser. It supports WebGPU with WebGL 2 compatibility, ships a thin React wrapper, @playcanvas/react, and web components such as <pc-app> and <pc-entity>, according to its developer manual. Its free, MIT-licensed SuperSplat editor handles Gaussian splats.

• Pros: the closest thing to Spline's editor experience on an engine you can read and self-host.
• Pros: web components make embedding a scene in a plain page short.
• Cons: the editor is shaped like a game engine, with entities and scripts, so the first hour is slower than Spline's.
• Cons: storage limits apply on each plan.

Versus Spline, both are browser editors where several people can work on one scene. The difference is underneath: the PlayCanvas engine is open source under MIT, so a published scene runs on code you can read, fork and host.

Pricing: on the plans page, Free with 1GB, Personal at $15 a month with 10GB, and Organization at $50 per seat a month with 50GB, at the time of writing.

Needle Engine: best for Unity and Blender teams#

Needle Engine is a web 3D engine built on three.js. You author in Unity or Blender, or in code, and it exports a <needle-engine> web component with automatic compression and WebXR and AR support across iOS, Android, Quest and Vision Pro, according to its documentation.

• Pros: teams that already work in Unity or Blender keep their tools and get a web build out of them.
• Pros: compression and AR are handled for you.
• Cons: the free Hobby plan is non-commercial and shows Needle branding.
• Cons: it is a heavier setup than Spline for one object on one page.

Versus Spline, the starting point differs. Spline is where you model; Needle assumes the model, the materials and often the interactions already exist in Unity or Blender, and gets them onto a web page with compression handled. If the 3D starts life in a game engine, rebuilding it in Spline is the long way round.

Pricing: Pro is €49 per seat a month, billed yearly, on the pricing page at the time of writing. Choose it when the 3D already exists in a game engine and has to reach the web.

Vectary: best for product configurators and AR#

Vectary is a browser 3D tool aimed at no-code product configurators, embeds and AR in the browser without an app, with an AI ideation canvas on top. It is the alternative for a shop whose visitors need to pick a color, a material or an option and see it in 3D.

• Pros: configurators without code, which is the job Spline is least shaped for.
• Pros: AR that opens in the browser, without an app to install.
• Cons: the free plan allows five projects with private share links only.
• Cons: at the time of writing, app-free AR, WebXR and the Viewer API sit on the custom-priced Business plan, and unbranded public sharing comes through a separate Distribution add-on.

Versus Spline, a configurator is the difference. Spline can switch a color with states, but a configurator with many options, materials and AR is Vectary's core job. The trade is price, because the features that make it a configurator, AR included, sit on the higher plans.

Pricing: Starter is listed at $25 a month and Team at $250 a month on the pricing page, which shows prices in local currency. Check the AR line before you commit, because it decides the plan.

model-viewer: best free way to show one product in AR#

<model-viewer> is Google's open-source web component for displaying an interactive glTF model and opening it in AR, under Apache 2.0, with three.js as a peer dependency. It hands off to WebXR, Android Scene Viewer or iOS Quick Look, and can generate the iOS USDZ file for you, according to its AR examples.

• Pros: one HTML tag, free, and AR on both major phone platforms.
• Pros: loading posters, camera controls and lighting are attributes on the tag, not code.
• Cons: it shows a model; it does not build a scene or a page around it.
• Cons: you still need a good glTF, which usually means Blender. Blender's glTF exporter supports Draco compression but does not export area lights or world lighting.

Versus Spline, a Spline scene for one product is a designed moment, and model-viewer is a utility. It will not give you a hero, but it will give every product page a 3D view and AR for the cost of a glTF file.

Pricing: free. For a product detail page, this is the shortest path from a model file to a working 3D and AR view.

Unicorn Studio: best for WebGL effects without code#

Unicorn Studio is a visual tool for WebGL web components built from shaders, media, 3D and motion. It offers more than 75 effects, lets paid users upload their own GLB or glTF models up to 30 MB, and embeds through a JavaScript SDK its docs describe as about 50kb gzipped, with Framer, Webflow and plain HTML among the documented targets.

• Pros: shader looks such as light, distortion and particles, made visually without writing GLSL, with custom GLSL allowed.
• Pros: rendering stops when a scene leaves the viewport, per its performance docs.
• Cons: it is an effects tool first; modeling an object still happens elsewhere.
• Cons: the free plan is non-commercial, with up to eight publishes carrying Unicorn branding.

Versus Spline, the two make different things. Spline makes objects; Unicorn Studio makes surfaces, light and motion. If the Spline scene you are replacing is really an effect, a glowing gradient or a field of particles, Unicorn Studio does it without modeling anything.

Pricing: Legend is $20 billed monthly or $168 a year on the pricing page. The full comparison is in Unicorn Studio alternatives.

Rive: best for interactive characters and UI#

Rive describes itself as a 2D and 3D engine for games, apps and interactive UI. Its core is vector animation driven by state machines, with MIT-licensed runtimes for the web, iOS, Android, Flutter, React and more. Its 3D arrives through GPU Canvas, whose web support its docs mark as experimental.

• Pros: the best tool here for a character or a control that reacts to state, such as a mascot that blinks on hover or a toggle with personality.
• Pros: small files and runtimes on every platform.
• Cons: it is 2D first; treat its 3D as experimental for now.
• Cons: free exports play a Rive splash screen.

Versus Spline, both use states, for different material. Spline's states move a 3D object between poses; Rive's state machines drive 2D artwork through any number of states, with inputs from your code. For a true 3D object, Spline remains the better fit.

Pricing: Cadet from $9 per seat a month, billed yearly, on the pricing page at the time of writing. Choose it when the Spline scene you are replacing is really an animated character.

Thanor: best for a whole AI-built page with a 3D look#

Thanor is a library of website designs and has no 3D editor. Each design is shown as a live preview and paired with a long, exact prompt that you paste into Claude, ChatGPT, Gemini, Cursor, Lovable, v0 or Bolt, and the model builds the site. Each prompt is a full art direction written as values, from hex palette and type scale to easing curves, section order and the hosted films, cut-outs and stills the page uses.

The 3D in the library comes in three forms. Kickflip is real-time WebGL with no library, Octavo is CSS 3D, and Verdier is a scrubbed film.

• Pros: the whole page arrives designed, with the object inside it, and the model writes plain HTML, CSS and JavaScript that you host.
• Pros: the Thanor MCP lets Claude, ChatGPT or Cursor search the library and pull a design's art direction directly.
• Cons: you cannot model your own object; for your own product you still need your own renders or a glTF.
• Cons: the prompts are licensed for your sites and your clients' sites, not for resale.

Versus Spline, the unit is different. Spline gives you a 3D object to place on a page you still have to design. A Thanor prompt gives a model the whole page, with the 3D look decided and, in most of the designs shown here, delivered as films and cut-outs that need no runtime. If you need your own object turned in real time, Spline or Three.js does that, and Thanor does not.

Pricing: some designs, such as Vesperion, are free with a free account; the rest come with a paid plan. How it compares with other prompt libraries is in MotionSites alternatives, and 3DWebsitesAI, whose 3D demos are free to scroll, has a page of its own.

Also worth knowing#

Four more tools come up in the same searches, each for a narrower job.

• Sketchfab: hosted model embeds. Basic is free with 10 uploads a month; removing the logo from embeds is an Enterprise feature at the time of writing.
• Verge3D: exports Blender, 3ds Max and Maya scenes to the web, sold as perpetual licenses from $290.
• Womp: a free, browser-based 3D modeling tool built on soft, blob-like shapes, closer to Spline's modeling side than to its export side.
• Blender: free under the GPL, and the usual place a web-ready glTF is made, whichever engine displays it.

How to choose#

Four questions settle it in a minute, and they work in order.

1. Does the visitor need to choose the angle? If not, skip the live scene: a film or cut-out is lighter, as argued in the best 3D websites. Thanor's designs show both.
2. Do you write code, or will an AI model? Then Three.js with React Three Fiber. Name the release and the values in the prompt, as set out in what a 3D website AI prompt must contain.
3. Do you need an editor on an engine you own? PlayCanvas, or Babylon.js with its desktop editor. Needle if the team already lives in Unity or Blender.
4. Is the 3D a product someone buys? Vectary for a configurator, model-viewer for one model with AR.

If none of those fits and the job is a shader effect rather than an object, Unicorn Studio is the closer match, and if it is a character with states, Rive. For site builders that embed Spline scenes, see Framer alternatives.

The verdict#

For developers, and for anyone letting an AI model write the code, Three.js with React Three Fiber is the strongest Spline alternative: free, owned outright and understood by every model. For product pages, model-viewer is the best free choice and Vectary the best paid one for configurators. For a visual editor on an open engine, PlayCanvas.

Spline remains the right tool in three cases, and it is worth saying so plainly:

• A designer needs an interactive 3D object today, with states and events, and no developer is available.
• A team edits one scene together, in real time, in the browser.
• The object has to be modeled from scratch, quickly, by someone who does not use Blender.

And for a common case on a marketing site, a hero whose camera move is the same for everyone, the better answer is often no 3D runtime at all: a film or a cut-out, specified to the frame, inside a page that was designed as a whole.

See the 3D look without a 3D tool#

The quickest way to test whether your page needs a live scene is to build one that does not use one and compare.

Open Vesperion and copy its prompt; it is free. Paste it into Claude or Cursor and you get a character with real depth in front of its headline, built from a film and a 2D canvas, with nothing to export and no watermark. If the result is enough for your page, you have saved yourself a runtime. If it is not, the table above tells you which tool to open next.