Spline

Spline is a 3D design tool that runs in the browser, built so a team can model, animate and publish interactive 3D together in real time. It also brings AI agents into that picture: you can connect an assistant such as Claude, ChatGPT, Cursor or Codex through the Spline MCP server, let it build a first version of a scene, and then have designers refine it by hand in the same file.

The editor

Spline covers the core 3D workflow:

• Modelling with primitives, booleans, sculpting and AI 3D generation.
• Materials and light: layered materials, lights and post-processing.
• Animation and interaction: states, keyframes, events and physics, so scenes respond to clicks and scrolling.
• A 2D editor with AI image generation, background removal and upscaling.

Everything an agent creates is a normal Spline object you can select, restyle and animate, and changes appear live for the whole team.

Publishing

One scene can go to the web (WebGPU or WebGL, as a link, an embed or exported code, including React), to an iPhone app as a native SwiftUI view or Xcode project, or to Android through Jetpack Compose or a built APK.

Pricing

From the official pricing page, checked October 2026, per seat per month:

• Free: limited personal files, unlimited viewers, web exports with a watermark.
• Hobby: $12 billed annually or $15 monthly. Unlimited 3D and 2D files, no watermark on web exports, higher-res images, material and audio library, 2,000 AI credits a month (more can be added).
• Pro: $25 billed annually or $30 monthly as listed. Unlimited projects, video export, Apple and Android exports, unlimited variables, APIs and webhooks.
• Max: 10,000 AI credits a month, more media generation and higher MCP limits. Its price varied with the credit option shown.
• Enterprise: custom, with SSO, code and self-hosted exports, version history and team library.

Yearly billing saves up to 20%. See spline.design/pricing for current figures.

Who it suits

Web and product designers adding interactive 3D to sites and apps, brand teams, and developers who want 3D without building a graphics pipeline. Spline's customers say even junior designers can pick it up. For film-quality rendering or game asset creation, a traditional 3D package is still the better tool.

Pros: runs in the browser; real-time collaboration; publishes natively to web, iOS and Android.
Cons: watermark on free exports; app exports need Pro; AI credits limit heavy generation.

Alternatives

Meshy focuses on AI 3D model generation. For flat graphics, try Recraft or Canva.