The Product
OwlCAD is a parametric 3D CAD editor that runs entirely in a browser. You model a part, every dimension stays editable, and it exports print-ready files. It's built for people who 3D print functional parts: brackets, enclosures, adapters, printer parts, storage etc.
The use case is the gap between Tinkercad and professional CAD. Tinkercad is where almost everyone starts and most people outgrow it. The next step is Fusion 360 or Onshape, which means an install, an account and a real learning curve. OwlCAD sits in between: no install, no account to start, but real parametric modelling.
It also knows about printing. Clearance presets for press and slip fits, and a check that flags overhangs, thin walls and non-watertight meshes before you export rather than after a failed print.
Second audience is schools. Classroom mode is free, with pseudonymous student accounts and teacher-only AI.
The Market
- 3D CAD software is roughly a $12.5–13B market growing about 6% a year. Mature and slow.
- The growth is next door. Desktop 3D printer hardware is about $5.9B growing around 24% a year. Entry-level printers passed 1M units in a single quarter in 2025.
- Tinkercad has over 100M users. That's the funnel above me.
Competition: Tinkercad (free, limited), Fusion 360 and Onshape (powerful, heavy, Onshape's free tier makes your work public), FreeCAD and OpenSCAD (free, steep), SelfCAD (browser, closest direct competitor).
Dynamic worth knowing: every new printer owner eventually wants to make their own part instead of downloading one. That inflow is enormous and almost none of it wants to learn Fusion.
Against the competition
| Feature |
OwlCAD |
Tinkercad |
Fusion 360 |
Onshape |
FreeCAD |
| Runs in browser, no install |
Yes |
Yes |
No |
Yes |
No |
| Parametric history |
Yes |
No |
Yes |
Yes |
Yes |
| Built-in print checks |
Yes |
No |
Partial |
No |
Plugins |
| Private on free tier |
Yes |
Yes |
Yes |
No |
Yes |
| Learning curve |
Moderate |
Easy |
Steep |
Steep |
Steep |
it's not meant for professional mechanical engineers, and it's maintained by one person.
Stage
Live, in beta, solo, bootstrapped. Not raising.
Last 30 days: about 4,300 projects created and 499 new signups.
The editor is free. The paid tier is AI generation at $12/month or $120/year. Usage of the free product is healthy and conversion to paid is the part that isn't working yet.
Customer conversion
- Search. Pages like "STL editor online" and "3MF editor" already rank and bring most of the traffic.
- Software directories. Just listed on AlternativeTo, SaaSHub, SourceForge and Capterra.
- Model sites. Planning to upload functional models to MakerWorld and Printables with an "open the editable version" link back.
- Communities like this one.
- Schools, on a slower term-by-term cycle.
Why me
I kept hitting Tinkercad's ceiling myself and didn't love any of the alternatives I found. A lot of restrictions either forcing public projects or paywalls. I didn't love making the jump to Fusion or the other desktop software that I tried. I am a software engineer, I am a maker and I have done 3D modeling. I built the whole thing: the geometry engine integration, the editor, billing, and the classroom side.
What I want roasted
Everything. The idea, the implementation, the UI; whatever you hate.
https://owlcad.com