Pricing
One plan. Everything in it.
Paid plans are available in 81 countries. Stripe is the seller of record and handles the tax. The free tier is open worldwide.
Free
$0to start
Model a real build and see the numbers, no card required.
- Unlimited simulations on the Fast propeller model
- Single points, single-axis, multi-axis and component sweeps
- Full motor, propeller and battery database, with datasheets
- 5 Full-model runs a day
- REST API, official Python SDK and MCP server
Pro
$10/ month
For dynamic missions, CAD export, and large sweep campaigns.
- Full propeller model, no daily allowance
- Dynamic time-domain missions
- Batch runs
- 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
Custom
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 | ||
| Fast propeller model | Unlimited | Unlimited |
| Full propeller model | 5 runs per day | Unlimited |
| REST API / Python SDK / MCP | ||
| Full database | ||
| Component datasheets | ||
| Custom components | ||
| Propeller creator | View | Edit |
| Single-axis sweeps | ||
| Multi-axis sweeps | ||
| Component sweeps | ||
| Dynamic missions | ||
| Batch runs | ||
| CAD export | ||
| FMI 3.0 export | ||
| Concurrent execution (account-wide) | 1 at a time | 5 at a time |
Unlimited means no usage quota. A Full-model run is one job: a single point or a sweep within the free per-job limits. API request rate limits and global overload protection still apply on every plan. You pay for annual plans once a year. See how both propeller models compare with test data in the validation reports.
ThrustLab vs eCalc
An honest capability comparison
| Capability | ThrustLab | eCalc |
|---|---|---|
| Coupled battery-to-prop model | Yes | Yes |
| Validated against wind-tunnel data | Yes | No |
| Real blade geometry (BEM) | Yes | No |
| Dynamic time-domain missions | Yes | No |
| Mixed multi-rotor groups | Yes | No |
| Build-your-own propeller + CAD export | Yes | No |
| Free single-point calculation | Yes | Yes |
FAQ
Pricing questions
Is there a free plan?
Yes. Free includes unlimited simulations on the Fast propeller model, including single points and single-axis, multi-axis and component sweeps. You get the full motor, propeller and battery database with datasheets. The REST API, official Python SDK and MCP server are included. Free runs one simulation at a time and allows five Full-model runs a day. A single point or whole sweep counts as one run. No card required.
What is a compute unit?
One compute unit is one physical rotor solved. A four-rotor static simulation records four compute units. Every plan records them for usage and cost, with no compute-unit quota. Free's only allowance is five Full-model runs a day, counted per run, not per compute unit.
Are Pro simulations unlimited?
Yes. Pro has no daily, weekly, or monthly simulation quota and runs up to five simulations at a time; dashboard and API submissions share the account limit, and extra work starts automatically from the queue. API request-rate and global overload limits still apply.
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.
Which countries can buy a paid plan?
81 countries are supported. Checkout lists them. Your billing address determines which country you are buying from. Pro costs $10/month or $50/year before tax. Stripe, the seller of record, adds sales tax, VAT or GST at checkout before payment. Checkout may show prices in local currency. Receipts come from Link, Stripe's reseller. Card statements show LINK.COM* THRUSTLAB. Elsewhere, only the worldwide free tier is available. The list can change with Stripe's seller of record coverage.
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.