Terms of Service
Last updated: 2026-06-05. By using Plinth (operated by a Colorado LLC) you agree to these terms.
1. Accounts
You must be at least 18 to use Plinth. One account per person. You are responsible for activity under your account and for keeping access to your email secure.
2. Acceptable use
You may not scrape or reverse engineer the service, attempt to extract API keys or other users' data, resell access, or use Plinth-generated content for illegal purposes. We may rate-limit, suspend, or terminate accounts engaged in abuse, fraud, or chargebacks.
3. Your content and ownership
You own what you generate. By making a project page public you grant Plinth a license to display that page. Public project pages are opt-in; you choose when to publish.
4. Patent disclosure
Making a project public is a public disclosure for patent purposes. In the United States you have one year from that date to file a patent application; in most other countries public disclosure may permanently bar patent protection. Plinth's Patent Readiness tools are educational preparation only and are not legal advice. Consult a registered patent attorney before relying on any output or before publishing.
5. Subscriptions and billing
Paid plans renew automatically each billing period until cancelled. You can cancel anytime from your account via the Stripe customer portal; access continues until the end of the paid period. Prices are shown at checkout.
6. Refunds
Plinth offers a 14-day no-questions refund on any first-time subscription. After 14 days, monthly subscriptions are non-refundable for the current period but can be cancelled and will not renew. Annual subscriptions are pro-rated for unused months minus a 10% restocking fee, refunded within 30 days of request. Email support@plinthdesign.org.
7. Disclaimers and liability
Bills of materials, schedules, CAD/PCB/firmware starters, and all generated plans are starting points, not professional engineering advice. You are responsible for verifying the safety, correctness, and suitability of any design before building or relying on it. The service is provided "as is" without warranties to the fullest extent permitted by law.
8. Termination & governing law
We may terminate accounts for abuse, fraud, or chargebacks. These terms are governed by the laws of the State of Colorado.
Questions? hello@plinthdesign.org