Start free.
Buy credits when you need more.
Build circuits, engines and vehicles at no cost. Spend credits only on the premium parts, templates and exports you actually use.
Builder — $0
The whole workshop, no card and no trial clock: circuit, engine and vehicle builders, the core parts library, templates, tutorials and a starter credit pack to spend on your first premium unlock.
- All 3 builders
- Core parts library
- 200 starter credits
- Community gallery
- Saved projects
Credit packs
One-time purchase, never expires. The $4.99 plan is now free — keep the change and buy credits only when you need them.
Spark Pack
Try the premium templates and AI reports
500 credits
One-time purchase · $0.010 per credit
Credits never expire
🔒 Secure encrypted checkout · Cancel anytime
Builder Pack
For builders who work on a project most weeks
1,200 credits
One-time purchase · $0.008 per credit
+20% bonus credits
🔒 Secure encrypted checkout · Cancel anytime
Studio Pack
Classrooms, teams and heavy video export
3,000 credits
One-time purchase · $0.007 per credit
+50% bonus credits
🔒 Secure encrypted checkout · Cancel anytime
What credits unlock
Transparent pricing, charged only when you use it.
Premium template unlock
150Hypercars, track packs and expert builds — unlocked for good
Full engine library
300All 120+ parts, permanent unlock for the whole account
AI diagnostic report
40Reads your circuit or engine and explains every fault
Cinematic video export
250A shareable reveal of your build, no watermark
Aiden's College Fund
YouBuildItAI is an intentional father-son project built by Darrance and Aiden Tezino. Every subscription goes toward Aiden's early college fund and a shared love of STEM. Your build helps build his future.
Build every week? Go Pro or Elite
Memberships bundle credits with unlimited projects, the full engine library and every premium template included.
Pro
Full engine power
Credits + premium unlocks included
Billed monthly · Cancel anytime
🔒 Secure encrypted checkout · Cancel anytime
- 3,000 credits included
- Unlimited active projects
- Full engine library — included
- Every premium template — included
- Advanced diagnostics & AI fix
- Export schematics to PDF
- Priority email support
- Video exports at member pricing
Elite
Cinema-grade experience
Credits + premium unlocks included
Billed monthly · Cancel anytime
🔒 Secure encrypted checkout · Cancel anytime
- 10,000 credits included
- Everything in Pro
- Cinematic 360° engine reveal
- All sound packs (V8, Turbo, F1…)
- Video export (watermark-free)
- Custom background scenes
- AI voice build guide
- API access + team workspace
Feature Comparison
Plan Comparison
Free to start. Pay per unlock, or go unlimited with a membership.
| Feature | Free $0 | Pro $12.99/mo | Elite $24.99/mo |
|---|---|---|---|
| Starter credits | 200 free | 3,000 included | 10,000 included |
| Top up with credit packs | |||
| Circuit builder | |||
| Engine builder | |||
| Vehicle builder | |||
| Core parts library | |||
| Full 120+ engine parts | 300 credits | ||
| Premium templates | 150 credits each | ||
| AI diagnostic reports | 40 credits | 40 credits | 40 credits |
| Cinematic video export | 250 credits | 250 credits | 250 credits |
| Cinematic 360° reveal | |||
| All sound packs | |||
| Priority support | |||
| API access + team workspace |
30-Day Money-Back Guarantee
Full refund, no questions asked
Cancel Anytime
No lock-in, no cancellation fees
Secure Encrypted Checkout
Bank-level encryption
4.9★ Rated Platform
By 1,200+ engineers
What engineers are building
"The most accurate simulation tool outside of professional CAD. Worth every penny."
Marcus T.
Automotive Engineer
"Pro plan gave me unlimited projects and the full engine library. Total game-changer."
Priya N.
Engineering Student
"Built a twin-turbo V8 virtually. Saved thousands in real-world trial and error."
James R.
Garage Builder
Build the World's Greatest Cars
Pro & Elite subscribers reverse-engineer real hypercar powertrains.
Lamborghini Huracán STO
640 HP
Pro & Elite only
Ferrari SF90 Stradale
986 HP Hybrid
Pro & Elite only
Bugatti Chiron SS
1,600 HP W16
Frequently asked questions
Do I need a subscription to build?
No. Every signed-in builder gets all three builders, the core parts library and a starter credit pack for free. Nothing is charged and no card is needed.
What do credits buy?
Premium template unlocks (150), the full 120+ engine library (300), AI diagnostic reports (40) and cinematic video exports (250). Each cost is shown before you spend.
Do credits expire?
No. Credits stay on your account until you use them, and packs stack on top of your balance.
When would a membership make sense?
If you build most weeks. Pro includes 3,000 credits, unlimited projects, the full engine library and every premium template for one monthly price.
Is billing secure?
All payments run through a secure, encrypted checkout. Your card details never touch our servers.
Ready to start building?
Free to start — add credits only for the premium parts and exports you use.
Start freeNo card required · Secure encrypted checkout