Spline AI

Where Spline sits

Spline is a browser-based 3D design tool aimed squarely at people who are not 3D artists. If Figma and Blender had a meeting point, it would look something like this: a real-time collaborative editor where designers model, texture, animate, and script interactive 3D scenes, then publish them to the web with a link or an embed. The company launched around 2020 (Preqin lists the Delaware entity as established in 2020), raised a $10 million round in August 2024 alongside cross-platform app export support, and has taken roughly $41 million in total funding per CB Insights' tracker. The team is small and the product has earned its place in web design workflows largely on ergonomics: you can produce a credible interactive 3D hero section without learning a traditional DCC tool.

The AI layer — the reason the product is listed here — is bolted into that editor rather than existing as a separate generator. Spline's AI features cover 3D generation from prompts, texture generation, an AI Agent that manipulates the scene for you, image generation, background removal, and image upscaling. All of it runs on a credit meter, and the included monthly credits are the main thing that separates the paid tiers.

What it actually does

Pricing at time of writing (spline.design/pricing, USD per seat): Free at $0 with limited personal files, unlimited file viewers, web exports with a watermark, and access to the Spline library. Hobby at $12/seat/month billed annually ($15 monthly) with 2,000 monthly credits, unlimited files, no watermark on web exports, video upload, and the material and audio library. Pro at $25/seat/month billed annually ($30 monthly) with 3,000 monthly credits, unlimited folders and projects, video export, unlimited scenes per file, Apple and Android exports, audio upload, unlimited variables/APIs/webhooks, and no watermark on web embeds. Max at $60/seat/month billed annually ($70 monthly) with 10,000 monthly credits, five times more media generation per week, 100 MB max video size, higher MCP tool-call limits, and code export. Enterprise is custom (billed yearly) with SAML SSO, team privacy, centralized licensing, file version history, a Team Library, self-hosted exports, and priority support. Every tier can bolt on extra credit packs — the pricing page shows the same $48/year increments adding 1,000 credits/month from Hobby upward, and Max can scale to 20,000 credits/month.

The feature comparison table clarifies where the ceiling is. AI Agent, AI 3D generation, and AI texture generation are available across paid tiers with credits; image generation, background removal and upscaling ride the same meter. Exports cover GLTF with color and texture, USDZ and STL; app generation for Apple and Android is a paid-tier feature; download-code export and self-hosted export are Max and Enterprise territory. MCP appears explicitly — Spline ships tool-call limits that scale with plan, which means the editor can be driven from AI clients — and that, plus the variables/APIs/webhooks surface, is what makes Spline programmable rather than just a drawing tool.

My testing notes

What I look for in web-3D tools is the distance between "pretty scene in the editor" and "publishable asset on a real site," and Spline is the shortest distance I have measured in this category. The web export path produces an embeddable interactive scene; on Free it carries a watermark, and Hobby removes it for web exports while Pro removes it for embeds as well — a split that is easy to miss when choosing a tier. The export formats (GLTF with textures, USDZ for Apple AR) cover the realistic web and AR delivery cases.

Second, the collaboration model is genuinely Figma-like: multiplayer editing in the browser, unlimited viewers on all plans, folders and projects that scale from Pro upward. In my testing the multiplayer editing held up for two designers working the same scene without the lock-step friction of traditional 3D tools. The limits that showed up were credit-related, not collaboration-related — AI generation burns credits quickly, and the 2,000-3,000 credit allotments on the lower tiers mean AI is a periodic accelerant, not a constant generator.

Third, the AI generation itself. Text-to-3D and texture generation inside the same document is the workflow that matters: generate a base object, adjust it with normal modeling tools, generate a texture, wire interactions with variables. The outputs are starting points, not finished assets — I treat them as blockouts. The AI Agent is the more interesting direction: it operates on the scene (creating and modifying objects) rather than emitting a standalone mesh, and Max's higher MCP tool-call limits are clearly aimed at agent-driven workflows.

Where it falls short

This is not production-grade 3D. If you need film-quality rendering, complex rigging, simulation, or million-polygon sculpting, Blender or a full DCC package remains the tool; Spline's renderer and modeling depth are built for interactive web experiences. Performance on complex scenes degrades — the browser-based real-time renderer is doing a lot of work, and heavy scenes with many lights and materials get sluggish on mid-range hardware.

The credit model deserves a close read before you commit. AI features are metered, media generation has a weekly cap that only loosens at Max ("5x more media gen per week"), and the credit pack add-ons are priced as annual increments per seat, which adds up. For an AI-heavy workflow the effective cost is higher than the headline seat price.

Smaller gripes: the Free tier is a genuine sandbox rather than a workable plan (watermarked exports, limited files), the plan comparison mixes 3D-file and design-file feature rows in a way that takes real attention to parse, and some of the most useful export capabilities — code export, self-hosted export — sit at Max or Enterprise. And while the docs cover pricing mechanics and AI credits, there is less guidance than I would like on credit consumption rates per AI operation.

Verdict

Spline is the tool I recommend when the deliverable is interactive 3D on the web and the person building it is a designer, not a 3D specialist. It rated 4.0 in my rubric — 40% core functionality (a real collaborative 3D editor with AI generation and a programmable surface, deliberately short of DCC depth), 20% value (a usable $12 seat with clear ceilings, credits on top), 20% usability (the best ergonomics in web 3D), 10% support and ecosystem (docs, library, MCP and API surfaces, growing integrations), and 10% reliability signals (funded, shipping cross-platform exports since 2024, small but active team). Hobby is the right first purchase; buy Pro the moment embeds and project structure matter; and think hard about Max only if agent-driven or export-code workflows are central to what you are building.

Who should not buy it

Two profiles should skip Spline. The first is anyone whose output needs to be a game asset or a product visualization with true material fidelity — Spline scenes are stylized real-time renders, and no amount of credits changes that; for game-ready assets use a generation tool or a DCC package instead. The second is anyone expecting AI to do the whole job: the generation here is a drafting tool inside a design tool, and the teams getting value from it are the ones who model around what the AI produces. If your workflow is "prompt in, finished scene out," this will frustrate you.

There is also a scale question. Spline is priced per seat with credits on top and the published tiers stop at 20,000 credits/month per seat; agencies running many client scenes with heavy AI usage will need Enterprise conversations. And since AI credit pack pricing is published as annual increments ($48/year per extra 1,000 credits/month at the lower tiers), the math is transparent but the ceiling is real. What I do like is that the core collaboration and export features are not credit-metered — only generation is — so a team that models manually pays the seat price and nothing more.

On balance the product does what its category demands: it makes 3D a design skill instead of a specialist trade, and the 2024 cross-platform push (Apple and Android app exports from the same scene) turned it from a web toy into a credible prototyping surface. The credit ceilings and the DCC gap are the trade-offs, and they are stated on the pricing page rather than hidden in a contract.

Sources

• https://spline.design/pricing
• https://docs.spline.design/account/pricing
• https://hamirev.com/spline-pricing-plans-and-review
• https://saaspartout.com/marketplace/spline
• https://itechguides.com/products/spline/pricing
• https://www.cbinsights.com/company/spline/financials
• https://www.preqin.com/data/profile/asset/spline--inc-/431350
• https://siliconangle.com/2024/08/13/3d-app-game-design-platform-spline-raises-10m-extends-support-android/
• https://www.businesswire.com/news/home/20240813508808/en/Spline-Becomes-First-3D-Design-Platform-to-Enable-Designers-to-Ship-Interactive-Experiences-Cross-platform
• https://platform.tracxn.com/a/d/company/531ccf8ee4b0f7e166604469/spline