Promti or Spline: a 3D website that’s finished, or the tool to make the 3D
Spline is a 3D design tool that runs in the browser. It describes itself as a way to create interactive 3D and 2D experiences and ship them to the web, iOS and Android without writing code. You build a scene, give it states and events, and publish it as a link, as an embed inside a site made elsewhere — Webflow, Framer, Wix, Shopify — or as code.
Promti starts where a Spline scene ends: with a whole website. Each kit is a finished one-page site for one kind of business, with its 3D scene, its text, its phone version and its legal page; a wizard makes it yours, and you download plain files to host anywhere.
So the choice is about what you want to make yourself. With Spline, the scene is yours to design and the site around it comes from another tool. With Promti, both arrive made, and what you change is the content.
Side by side
| — | Promti | Spline |
|---|---|---|
| How you pay | €500 for the whole site, one time. | Per seat, with dollar prices (the page names no currency and says nothing about tax): Hobby $12 a month billed yearly or $15 monthly, Pro $25 or $30, Max $60 or $70. The free plan’s web exports carry a watermark. |
| What you get | A website: a finished page around a 3D scene, with its text, its buttons, a legal page and the guides to put it online. | A design tool: a 3D and 2D editor, libraries of materials and models, AI credits on paid plans, and exports of what you make. |
| The site around the 3D | Included: headings, text, buttons and links, Studio’s form, a legal page, the title and description for Google. | Made in another tool. Spline documents embeds in Webflow, Framer, Wix, Shopify, Notion and others, each on its own plan. Spline Inc. also runs Omma, a separate AI site builder. |
| Where it’s hosted | Wherever you put the files — the guide uses Cloudflare Pages’ free plan — and the site loads nothing from anyone else’s servers. | Public links and embeds load the scene from Spline’s servers. Pro can download a code export to host yourself; a fully self-contained export is Enterprise only. |
| Making the 3D | Done: the scene, its light and its choreography come with the kit. You bring the content — and, in Product, your own model. | Yours to make, without code: modelling, materials, lights, states, events, physics. Its Academy teaches it; Spline 101 alone is 16 videos, about four hours. |
| Phones and speed | Set up already: the drawing resolution is capped, Product and App reframe for an upright phone, and Forest lowers its resolution when frames slow down. | Its docs advise one or two embeds per page, fewer than three lights per scene, and the Viewer over an iframe, because the Viewer only loads once it’s on screen. |
| Text and Google | The page’s headings and text are HTML laid over the scene, where search engines and screen readers can read them. | Spline’s pages don’t mention SEO or screen readers. Text in a scene is an object in the 3D, and Google says it doesn’t index what’s drawn in a canvas; the site around the embed has to carry the words. |
| Interactivity | The scroll drives the scene, and the buttons lead to your payment link, your bookings or your form. | Much more: states, events, variables, physics, game controls, APIs and webhooks, all set up without code. |
| Other platforms | A website, and only that. | Apple and Android apps, visionOS, video, USDZ for AR and STL for 3D printing, mostly from Pro. |
| Working together | One person fills in the wizard, in one browser. | Several people edit the same file at once; viewers are free on every plan. |
| When you stop paying | There’s nothing to stop: the site is paid for. | The plan lasts to the end of the billing period, and payments aren’t refunded unless Spline decides otherwise. |
| Help | Guides for publishing and connecting each thing, plus a 30-minute call with Eric when something gets stuck. | Docs, the Academy, videos and a Discord community; priority support on Max and Enterprise. |
Promti fits when…
- You want a website with 3D in it, not a 3D project to finish and then fit into a website.
- You’d rather not learn a 3D tool to get one page right.
- You want every file in your hands from the first download, with nothing loaded from a tool’s servers.
- One payment, rather than a seat billed every month or year, suits the way you work.
- What you sell is one of the four kits’ subjects: a product, a place to stay or eat, an app, a body of work.
Spline fits when…
- You want to design your own 3D scene, exactly as you picture it, without writing code.
- The 3D has to do more than follow the scroll: react to clicks, run physics, be a small game.
- You already have a site on Webflow, Framer, Wix or Shopify and want 3D inside it.
- You also need the scene in an iPhone or Android app, in AR or as a video.
- A team designs together, in the same file, at the same time.
What each costs
Promti: €500 once, for the finished site. Hosting on Cloudflare’s free plan costs nothing, and a domain costs roughly €10–15 a year — about €30–45 over three years on top of the €500.
Spline, in the dollars its pricing page shows, per seat: Hobby, the first plan without a watermark on web exports, is $12 a month billed yearly — $144 a year, $432 over three — or $15 month to month, $540 over three. Pro, which can download a code export to host yourself, is $25 or $30 a month: $900 or $1,080 over three years.
Then comes the site the scene goes into: a builder’s own plan, or a site you make. Three years of Spline and a builder can come to more than a kit; what that buys is a scene of your own design — and the hours of designing it.
Questions
- Can I build a whole website in Spline?
- Spline’s docs cover scenes and frames published as a link, an embed or code, and its site pages talk about 3D websites hosted by Spline. What they don’t document is the rest of a site: pages, search settings, a domain. For that, Spline Inc. runs a separate AI builder, Omma, whose Pro plan, with custom domains, is US$39 a month.
- Is Spline free?
- There is a free plan, with a limited number of files and a Spline watermark on web exports. Hobby, from $12 a month billed yearly, removes the logo from public links, embeds and code exports.
- Can I host a Spline scene myself?
- Partly, from Pro: you can download a code export and host it on your own server, and download the scene file too. A self-contained export, with the runtime and every asset in one zip and no outside requests, is Enterprise only. A Promti site is self-contained from the first download.
- Are Promti kits made with Spline?
- No. Each kit’s scene is written in code with three.js, for that kit, and Forest works out your photos’ depth in your browser. That’s why what you download is ordinary HTML, CSS and JS, runnable anywhere, with no tool behind it.
- Which is better for Google?
- Google says it doesn’t index what’s drawn in a canvas, so neither scene counts as text on its own. With Spline, the words are whatever the site around the embed gives them; in a Promti page, the text is HTML over the scene. How a 3D website is made goes into why that matters.