What is Spline?
Spline is a 3D editor that runs in the browser, with a desktop app as an option. Designers model with primitives, booleans and sculpting, add layered materials and lights, then use states, events, keyframes and physics so scenes react to hovers, clicks and scrolls. A built-in AI agent, and an MCP server for Claude, ChatGPT or Cursor, can build scenes in the same live file the team edits.
Unlike Blender, which is made for modelling and rendering, Spline is made for real-time scenes: one file publishes to the web on WebGPU or WebGL, to iOS on Metal and to Android on Vulkan.
Who is Spline best for?
Spline is best for web and product designers who want interactive 3D scenes on a site or in an app without writing WebGL code.
Website hero scenes
Designers can build an interactive 3D hero and publish it as a link or an embed without writing WebGL code.
Product and brand visuals
Product viewers and brand scenes react to hover, click and scroll, and stay editable by the whole team.
iOS and Android apps
Pro exports a native SwiftUI or Jetpack Compose view, or a full Xcode project or Android build.
Agent-driven 3D work
Claude, ChatGPT, Cursor and other MCP clients can build and edit scenes in a real Spline file that people then refine.
What's included with Spline?
Browser 3D modelling, states and events, AI 3D and texture generation, an in-editor agent, a remote MCP server, and exports to web, iOS and Android.
- Modelling in the browser
- Primitives, booleans, sculpting and a bevel engine for extrusions, with layered materials, lights and post-processing.
- Interaction and animation
- States, events, keyframes and physics, plus unlimited variables, APIs and webhooks on Pro, make scenes respond to people and data.
- AI 3D generation
- Turn text or an image into a textured GLB with PBR maps, using Hunyuan3D, Trellis 2 or Meshy models.
- AI agent
- An agent inside the editor makes changes on request and can act on comment threads, then reply with what it did.
- Spline MCP
- A cloud MCP server with OAuth sign-in lets outside agents build and publish scenes without the editor open.
- Native and file exports
- Pro adds Apple and Android exports, video export, and USDZ and STL files for AR and 3D printing.
How much does Spline cost?
Spline has a free plan with a watermark and limited files; Hobby costs $15 per seat a month, Pro $30 and Max $70, or $12, $25 and $60 billed yearly.
- Limited personal files, unlimited viewers
- Web exports carry a Spline watermark
- No AI features; 20 MCP tool calls a day
- $12 a month billed yearly
- 2,000 AI credits a month
- Unlimited files, no watermark on web exports
- $25 a month billed yearly
- 3,000 AI credits a month
- Apple and Android exports, video export
- $60 a month billed yearly
- 10,000 AI credits a month
- 400 MCP tool calls a day, priority support
Enterprise is priced on request and billed yearly, with SSO, a Team Library, version history and self-hosted export. Extra AI credits cost $5 a month per 1,000 per seat, up to 10,000 on Hobby and Pro and 20,000 on Max. Credits renew each billing cycle and do not roll over. Cancelling keeps your plan to the end of the period, with no prorated refunds. Full pricing on spline.design. We checked these prices on .
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Spline pros and cons
It is quick for designers to learn and publishes interactive 3D in a few clicks, but heavy scenes slow pages and AI credits come bundled into every paid seat.
Pros
- Most reviewers say it is quick to pick up and fun to use.
- Scenes publish straight to a link or an embed, so a 3D hero does not need a developer to rebuild it.
- The free plan with unlimited viewers is enough to learn the tool and share scenes before paying.
Cons
- Heavy scenes can slow page loads: Webflow users and developers report long load times and low Lighthouse scores until they lazy-load the scene.
- Past price rises tied to AI features angered long-time users, and every paid seat now includes AI credits whether you use them or not.
- People without any 3D experience still find the learning curve steep.
- Some reviewers report slow support replies and a hard-to-find cancel option.
How do I connect Spline to my AI agent?
Spline MCP is Spline's official MCP server. Add it to your agent once, then ask it to create and change 3D objects and scenes in Spline.
Lets your agent work inside the Spline editor you have open, adding and changing 3D objects, materials and scenes as well as interactive Hana designs.
Spline gives each account its own server address. Open the setup guide, copy your address, then add it to Claude Code like any other server.
Use the address from Spline's setup guide.
Spline's setup guide covers the sign-in.
Then ask your agent
- Runs
- On the web
- Sign-in
- See guide
- Maker
- Spline
- Guide
- spline.design
What are the best Spline alternatives?
Tripo AI or Rodin when you only need generated 3D models, and Framer when the job is a whole website rather than a 3D scene.
Tripo AIFreeChoose it when you only need textured 3D models from a prompt, photo or sketch for a game engine or a 3D printer, not an interactive scene editor.
RodinFreeChoose it when the model itself matters more than interaction, such as game or product assets generated from a photo or a text prompt.
FramerFreeChoose it when the job is the whole marketing site, with hosting, a CMS and a free plan, and you need motion rather than real-time 3D.
Questions about Spline
What is Spline?
Spline is a browser-based 3D design tool from Spline, Inc. that lets designers build interactive scenes, alone or with AI agents, and publish them to websites and iOS and Android apps.
Who is Spline for?
Spline is best for web and product designers who want interactive 3D scenes on a site or in an app without writing WebGL code.
Is Spline free?
Yes. Spline has a free plan: limited personal files, unlimited viewers.
How much does Spline cost?
Spline's paid plans are Hobby at $15 per seat per month, Pro at $30 per seat per month and Max at $70 per seat per month.
Does Spline have an MCP server?
Yes. Spline MCP is Spline's official MCP server, so agents such as Claude Code, Cursor, Codex and GitHub Copilot can create and change 3D objects and scenes in Spline. Spline runs it on the web.
What are the best Spline alternatives?
The closest alternatives on Recaply are Tripo AI, Rodin and Framer.
Does a Spline scene slow down my website?
It can. Spline's own docs say large textures, many materials and lights, and high polygon counts add load time. They suggest fewer than 3 lights and 3 embeds per page, the Performance panel to find problems, and the Spline Viewer, which lazy-loads scenes.
Can I use Spline models in Blender, Unity or Unreal Engine?
Yes. Spline's AI generator downloads models as GLB files, which Blender, Unity and Unreal Engine can import, and the editor exports scenes as GLTF or GLB. GLTF with color and texture, USDZ and STL exports need Pro or Max.
Which AI models does Spline use to generate 3D models?
You choose: Hunyuan3D is the default, Hunyuan 3.1 Pro gives the most detailed geometry, Trellis 2 handles shapes that pass through each other, and Meshy gives clean results. Each run is billed in AI credits, and the cost is shown before you send.
Can I export Spline scenes to iOS and Android apps?
Yes, on Pro, Max and Enterprise. Spline gives a native SwiftUI view or a full Xcode project for Apple platforms, and a Jetpack Compose view, APK or App Bundle for Android, each with its own renderer.
Does Spline train its AI on my files?
No. Spline says its AI does not use users' files or data, and it collects prompt data only when you choose to share it as feedback. AI data is handled on Spline's own servers.
Our verdict
Spline is a strong choice for designers who want interactive 3D on a website or in an app without writing code.
It covers modelling, interaction, AI generation and publishing in one browser tool, and paid seats start at $15 a month.
- Skip it for
- 3D artists who need detailed modelling and rendering, and sites where page speed matters more than a 3D scene.
- Check first
- How fast a test scene loads on a mid-range phone before you build it into a live page.
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