Pricing
One plan. Everything in it.
Paid plans are currently available in the United States only and require a US billing address. The free tier is open worldwide.
Free
Model a real build and see the numbers, no card required.
- Static powertrain simulations
- Starter catalog of motors, propellers and batteries
- REST API + official Python SDK
- 5 simulations per day
Pro
For dynamic missions, CAD export, and large sweep campaigns.
- Unlimited simulations
- Full motor, propeller and battery database
- Dynamic time-domain missions
- Single- and multi-axis parameter sweeps
- Custom propeller creator
- CAD geometry export (STEP / IGES / STL)
- FMI 3.0 co-simulation export
- 5 simulations at once, shared across dashboard and API
Teams
Multi-seat access for labs, classes and companies.
- Everything in Pro
- Shared workspace and pooled seats
- Invoiced billing
Compare plans
Choose the access and execution capacity that fits your work.
| Feature | Free | Pro |
|---|---|---|
| Static simulations | ||
| REST API / Python SDK | ||
| Full database | ||
| Propeller creator | ||
| Single-axis sweeps | ||
| Multi-axis sweeps | ||
| Dynamic missions | ||
| CAD export | ||
| FMI 3.0 export | ||
| Component spec readout | ||
| Unlimited usage | 5 per day | |
| Concurrent execution (account-wide) | 1 at a time | 5 at a time |
Unlimited means no usage quota. API request rate limits and global overload protection still apply on every plan. Annual plans are billed once a year.
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 single-point calculation | ✓ | ✓ |
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?
What is a compute unit?
Are Pro simulations unlimited?
Can I cancel anytime?
Do you offer commercial or multi-seat plans?
Start free, upgrade when you need more
No card required to model your first build.