Cartesian by Formas is an AI 3D modeling tool — great at geometry, but it markets nothing. Kompozy turns your designs into content across nine platforms.
If you searched "Cartesian alternative," it's worth being precise about what Formas actually built. Cartesian is an AI 3D-modeling tool: describe, sketch, or drag in a reference and it produces an editable 3D model, aimed at architecture and product design, with native NURBS solids and exports to Rhino, SketchUp, and STL. It's a promising early modeler. It is not a content or marketing tool, and that distinction is the whole point of this page.
So the honest answer up front: Kompozy is not a replacement for Cartesian's modeling. If you want a better way to generate precise geometry, look at Rhino, SketchUp, or another AI 3D generator — not at a content engine. Kompozy sits on the other side of a design studio's job: the part where you have to show the work, tell its story, and put it in front of the people who commission projects and buy products. A perfect model that nobody sees wins no clients.
That's the real bottleneck this page addresses. Design studios and product makers are usually excellent at the craft and inconsistent at the marketing — a burst of posts around a launch, then silence for weeks. Cartesian makes the models faster; it does nothing about the cadence, the formats, or the distribution. Kompozy is a content generation and publishing engine built for exactly that gap: it turns one design into a full week of on-brand content and ships it everywhere, on a schedule, without a marketing hire.
Everything below reflects Cartesian's public state on 2026-09-15 — pre-launch, with its preview opening September 18, 2026, early access going first to Formas' founding-circle and studio members, a public waitlist otherwise, no published pricing, and vendor-stated (not independently benchmarked) geometry claims. Verify current details on Formas' own pages.
Cartesian is Formas' AI 3D modeler. You give it natural language, a sketch, or a dragged-in photo, plan, or scan, and it builds a 3D model — positioned to produce native NURBS solids and exact, editable geometry with clean topology rather than the polygon meshes most text-to-3D tools output. It's built with BIM-style workflows in mind (named elements with explicit relationships) and exports to SketchUp (.SKP), Rhino (.3DM), and STL, with AutoCAD and IFC listed as planned. The use cases span product, furniture, interiors, architecture, landscape, manufacturing, 3D printing, and game assets. That's the product: a modeling tool that gets a designer from idea to editable geometry quickly. It produces files you can measure, cut, print, or machine and hand to the rest of a CAD pipeline. What it doesn't do is anything downstream of the model — it writes no captions or copy, cuts no social video, designs no carousels or infographics, holds no brand voice for an audience, and schedules and publishes to nothing. Marketing the design is entirely outside its scope.
You'd pair Cartesian with something else — or look past it for a specific job — not because the modeling is weak, but because the modeling was never the marketing. A studio's growth doesn't come from having more models; it comes from consistently showing the work to the right audience. And that's the part Cartesian leaves completely undone: there's no way to turn a finished model into a reveal reel, a process carousel, a case-study blog, or a scheduled week of posts. The gap is worse than "one missing feature," because content isn't one artifact — it's many, on a cadence, in one voice. A single project should become a vertical video for Reels and TikTok, a carousel breakdown for Instagram and LinkedIn, photo posts, a blog for search, and a newsletter for the list — each written for its platform and all recognizably from the same studio. Cartesian generates none of that, and stitching it together by hand across a dozen tools is exactly why most design studios post in bursts and then go quiet. If your bottleneck is distribution and consistency rather than geometry, a modeler doesn't touch it.
| Feature | Cartesian by Formas | Kompozy | Note |
|---|---|---|---|
| AI 3D model generation | Yes — core product | No | Cartesian's whole job. Kompozy is a content engine, not a 3D modeler — it markets the model, it doesn't build it. |
| NURBS / CAD-precision geometry | Yes (claimed) | No | Cartesian targets precise, editable solids for design pipelines; outside a content engine's scope entirely. |
| CAD exports (Rhino, SketchUp, STL) | Yes | No | Cartesian exports .3DM, .SKP, and STL for the rest of your pipeline; Kompozy consumes the visual output, not the CAD file. |
| Photorealistic renders | Partial — via Formas Studio | No | Rendering lives in Formas' separate Studio product, not Cartesian; Kompozy repurposes whatever visual you capture or export. |
| Turn a design into social video | No | Yes | Kompozy makes vertical clipped/listicle reveals with branded captions from a turntable capture or render; Cartesian makes none. |
| Carousels, infographics, quote cards | No | Yes | Kompozy builds brand-exact carousels and image formats via HyperFrames from one idea; a modeler produces geometry, not graphics. |
| Per-platform caption writing | No | Yes | Kompozy writes distinct copy per channel; Cartesian writes nothing. |
| Blog + newsletter generation | No | Yes | Kompozy drafts case-study blogs and email newsletters; outside Cartesian's scope. |
| Brand-voice governance | No | Yes | The Persona Brief and banned-word filters hold a studio's voice steady across every format; Cartesian has no such layer. |
| Persona / avatar video | No | Yes | HeyGen Persona Shorts put a recurring, face-locked presenter in front of a reveal — not something a modeler does. |
| Multi-platform scheduling + publishing | No | Yes | Kompozy fans output to nine platforms plus blog and email from one queue with Autopilot; Cartesian publishes nowhere. |
| Pricing model | Pre-launch / undisclosed | Monthly credits | Cartesian hadn't published pricing at review time; Kompozy bills credits covering generation + publishing. |
| Tier | Cartesian by Formas plan | Cartesian by Formas price | Kompozy plan | Kompozy price |
|---|---|---|---|---|
| Entry | Cartesian (pre-launch) | Not published (opens Sept 18, 2026 / waitlist) | Kompozy Starter | $99/mo (5,500 credits) |
| Mid | Formas Studio Pro (rendering) | Monthly credits (see Formas) | Kompozy Pro | $299/mo (18,000 credits) |
| Top | Formas founding-circle / studio access | Membership-based | Kompozy Enterprise | Custom (sales-led) |
The cleanest way to see it: Cartesian answers "how do I build the model faster?" and Kompozy answers "how does the world find out this design exists?" Those are different questions, and a studio that only solves the first still loses pitches to a studio that solves the second. Great work that lives in a .3DM file and a portfolio nobody visits doesn't fill a pipeline. Consistent, on-brand content that shows the work — the reveal, the process, the finished piece — is what turns a body of design into inbound leads.
So this isn't a "switch from Cartesian to Kompozy" decision; keep modeling wherever you model best. It's about adding the layer Cartesian was never built to be. An afternoon of modeling becomes a month of content: capture a turntable, drop it into Kompozy, and one project turns into clipped reveals, a build-in-public carousel, spec infographics, photo posts, a case-study blog, and a newsletter — all in your studio's voice, scheduled and published across nine platforms without a marketing hire. Start on Kompozy Starter at $99/mo (5,500 credits), set your Persona Brief once, and let every design you finish market itself.
Not for modeling — they do different jobs. Cartesian is an AI 3D modeler that builds precise, editable geometry; Kompozy is a content generation and publishing engine that turns designs into finished posts across nine platforms. If you need better 3D models, keep Cartesian (or Rhino/SketchUp). If you need to market the work, that's Kompozy. Most studios use both.
No. Cartesian builds 3D models and geometry — it writes no captions, cuts no social video, designs no carousels or infographics, and publishes nowhere. To turn a model or render into published marketing, you use a content engine like Kompozy, which clips, captions, builds every format, and posts across platforms.
Model your design in Cartesian, then capture a turntable screen-recording or export a render and drop it into Kompozy Quick Ingest. Kompozy fans it into a clipped reveal, a process carousel, a spec infographic, photo posts, a case-study blog, and a newsletter in your studio's voice, then schedules and publishes across the eight social platforms plus blog and email.
Formas hadn't published Cartesian pricing at review time — its public preview opens September 18, 2026, with early access going first to founding-circle and studio members and a waitlist for others. Kompozy is monthly credits — Starter at $99/mo (5,500 credits) and Pro at $299/mo (18,000 credits) — covering generation across formats plus publishing. They price different jobs, so compare on outcome, and confirm Formas' terms when they publish them.
Vertical clipped and listicle reveals with branded captions, brand-exact carousels, spec infographics, quote graphics, photo posts, case-study blog articles, and email newsletters — plus persona/avatar video, brand-voice governance, and scheduled multi-platform publishing. Cartesian builds the 3D model; Kompozy runs the content operation around it.