Spline is a browser-based 3D design tool with real-time collaboration and AI agents, letting teams model, animate and ship interactive 3D to web, iOS and Android.
About
Spline is a 3D design tool that runs in the browser, built for teams that want to create interactive 3D scenes for websites and apps without writing a rendering engine from scratch. It addresses a common workflow gap: designers produce 3D assets, but developers traditionally have to rebuild them in code to make them interactive online. Spline collapses that into a single shared file that can be published straight to the web or embedded natively in iOS and Android apps.
The editor covers modeling, materials, lighting, animation, states, events and physics, and it supports real-time collaboration so several people can work in the same file at once. Spline also takes an unusual position on AI: instead of a separate generation tool, it exposes the editor to external AI agents such as Claude, ChatGPT, Cursor and Codex through an MCP server, so an agent can build a first version of a scene that teammates then refine by hand. The company behind the product is Spline, Inc.
Key Features
Pricing & Fees
- Pricing: A Free plan at $0, then Hobby at $12 per seat/month, Pro at $25, and Max at $60 (billed annually; monthly rates are $15/$30/$70). Enterprise is custom, via sales contact.
- Free tier: The Free plan includes 20 MCP tool calls per day, limited personal files, unlimited viewers, watermarked web exports and access to the Spline Library.
- AI credits: Paid seats include monthly AI credits (2,000 on Hobby, 3,000 on Pro, 10,000 on Max); extra credits cost $5 per month per 1,000 and do not roll over.
- Plan-gated exports: Watermark-free web exports start on Hobby; Apple and Android exports and unlimited scenes per file require Pro or above.
Who It's For
Spline is aimed at designers and small teams building interactive 3D for websites, product configurators, marketing pages and brand experiences. Typical users include web and product designers who want 3D without deep engineering help, front-end developers who embed scenes through React or the Spline runtime, and brand designers creating hero sections or product viewers. It also suits teams experimenting with AI-assisted workflows, since agents can produce a first draft in the same editor designers already use. Companies cited on the site range from design agencies to startups in fintech and developer tooling.
FAQ
What is Spline?Spline is a free-to-start 3D design tool that runs in the browser, with real-time collaboration, AI generation and support for external AI agents editing scenes over an MCP server.
Is Spline free to use?Yes, Spline has a Free plan with limited files and 20 MCP tool calls per day; paid plans start at $12 per seat per month (billed annually) and add AI credits and watermark-free exports.
Which platforms and tools does Spline support?Scenes publish to the web via a viewer component or code export for stacks like React and Next.js, and run natively on iOS (SwiftUI/Metal) and Android (Kotlin/Vulkan). AI agents connect through MCP from clients such as Claude, ChatGPT, Cursor and Codex.
What are the limitations to know about?Free and lower-tier plans cap MCP tool calls per day, web exports carry a watermark below the Hobby plan, and AI credits refresh each billing cycle without rolling over.
Do I need to know how to code to use Spline?No, the editor is designed for visual work, but developers can go further with code export and APIs; the MCP server authenticates through the user's own Spline account rather than an API key.
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