PRICING
Start free. Upgrade when the work gets serious.
Free
$0to start
Model a real build and see the numbers, no card required.
- Static powertrain simulations
- Starter catalog of motors, propellers and batteries
- 5 compute units per day
HobbyistMost popular
$12.99/ month
For builders iterating on real designs every week.
- Everything in Free
- Custom propeller creator
- Access to the full database of motors, propellers and batteries
- Single-axis parameter sweeps
- REST API + official Python SDK
- 250 compute units per week
Pro
$59/ month
For dynamic missions, CAD export, and large sweep campaigns.
- Everything in Hobbyist
- Dynamic time-domain missions
- Multi-axis parameter sweeps
- CAD geometry export (STEP / IGES / STL)
- 2,500 compute units per week
Commercial & multi-seat use is contact-us-only at launch.
ThrustLab vs eCalc
An honest capability comparison
| Capability | ThrustLab | eCalc |
|---|---|---|
| Coupled battery-to-prop model | ✓ | ✓ |
| Validated against wind-tunnel data | ✓ | — |
| Real blade geometry (BEM) | ✓ | — |
| Dynamic time-domain missions | ✓ | — |
| Mixed multi-rotor groups | ✓ | — |
| Build-your-own propeller + CAD export | ✓ | — |
| Free instant single-point calc | ✓ | ✓ |
Where eCalc is better: eCalc is free, instant for a single operating point, and has a very large community parts database built up over many years. If you want a quick back-of-envelope check on a common setup, it is hard to beat.
FAQ
Pricing questions
Is there a free plan?
Yes. The free tier runs static powertrain simulations on a starter catalog selection, with a daily compute-unit allowance. Upgrade to Hobbyist for the full component database and the custom propeller creator. No card required.
What is a compute unit?
One compute unit is one physical rotor solved. A four-rotor static simulation uses four compute units. This keeps heavy multi-rotor runs priced fairly versus single-rotor checks.
Can I cancel anytime?
Yes. Subscriptions are managed through the billing portal and can be cancelled at any time; you keep access through the end of the period you have paid for.
Do you offer commercial or multi-seat plans?
Commercial and multi-seat use is handled on a contact basis at launch rather than through self-serve checkout. Reach out and we will set you up.
Start free, upgrade when you need more
No card required to model your first build.