Pricing
Drafting is free.
Paying is for keeping and building.
Describe as many machines as you like and read every figure and the formula behind it without paying anything. What the paid plans add is somewhere to keep the result, files you can build from, and a queue to submit it to.
Free
Free
Draft as much as you like. Keep one design.
Anyone deciding whether this is worth paying for
- Unlimited drafting — describe a machine and watch it solved
- Every figure with the formula that produced it
- The full build wizard, analysis and bill of materials on screen
- One saved design, replaceable whenever you like
- No exports. The URDF, STL, GLB, ROS package, BOM CSV and datasheet are all on the paid plans.
- Saving a second design asks you to upgrade or delete the first. There is no monthly cap — the one slot is the limit.
Maker
Most builders$49/ month
Everything the tool computes, in files you can build from.
One engineer building real machines
- Everything in Free, with room to keep it
- Exports: URDF, STL, GLB, ROS package, BOM CSV, datasheet
- Up to 50 stored designs
- Two prototype submissions a month
- Revision history on every design
- One seat. A second person needs Studio.
- Fifty stored designs is a ceiling, not a rate — archive or delete to make room.
Studio
$199/ month
No ceilings, and more than one person.
A team shipping machines together
- Everything in Maker, uncapped
- Five seats
- Unlimited stored designs and exports
- Ten prototype submissions a month
- Priority in the prototype queue
- Prototype submissions are still capped, because each one is real work at the other end rather than compute.
Side by side
| Limit | Free | Maker | Studio |
|---|---|---|---|
| Saved designs kept | 1 | 50 | Unlimited |
| Exports per monthURDF, STL, GLB, ROS package, BOM CSV, datasheet | — | 100 | Unlimited |
| Prototype submissionsreal work at the other end, so capped on every plan | — | 2 | 10 |
| Seats | 1 | 1 | 5 |
Why drafting is free
This tool’s argument is that it shows its working — every dimension with the formula that produced it, every assumption named. An argument you have to pay to evaluate is not an argument. So the whole of it is free to read, and what costs money is keeping it and taking it away with you.
Why prototype submissions are capped on every plan
Everything else here is compute, and compute got cheap when the solvers replaced the language model. A prototype submission is a person at the other end. That is the one limit that does not come off with a bigger plan.