Terms of Service

Rivet is online-only design software that turns a plain-language build brief into dimensioned plans, cut lists, renders and an assembly walkthrough for DIY makers. Rivet does not sell physical goods or materials, does not take on engineering commissions, and does not provide certified structural, mechanical or electrical engineering.

• You must be at least 13 to use Rivet. Users aged 13–17 must have consent from a parent or guardian.
• You are responsible for your account credentials and for activity under your account.
• You must provide accurate registration and billing information.

• Rivet is a pure subscription with Bench (free), Maker and Workshop tiers. There are no credits, top-ups or stored balances.
• Paid plans are billed in USD monthly or yearly through Stripe. Yearly plans are billed once at 20% off the monthly rate.
• Monthly build allowances reset each period and do not roll over.
• You can cancel anytime from the customer portal; access continues to the end of the paid period.

See the Refund & Cancellation Policy for refund terms.

You agree to use Rivet lawfully and within our Acceptable Use Policy. You must not use generated plans to make weapons, ammunition, controlled items, or anything unsafe or unlawful by design, and you must not bypass safety-critical structure.

You keep ownership of the briefs and files you provide. Generated outputs are licensed to you as set out in the Content License. You are responsible for how you use the outputs in the physical world.

Rivet outputs are amateur DIY references generated by AI and automated calculation. They are not certified engineering and are provided without warranty of strength, safety, dimensional accuracy or fit. You must verify every dimension and load before building, and use licensed professionals for load-bearing, gas, mains-electrical and plumbing work. See the AI Disclaimer.

To the fullest extent permitted by law, PAUL CONSTABLE ENGINEERING LTD is not liable for indirect or consequential loss, or for loss arising from your reliance on generated outputs, materials you buy, or work you carry out. Nothing in these terms limits liability that cannot be limited by law. Our total liability for any claim is limited to the amount you paid us in the 12 months before the claim.

We may suspend or end access for breach of these terms or the Acceptable Use Policy. You may stop using the service and cancel your subscription at any time.

We may update these terms; material changes will be posted here. These terms are governed by the law of England and Wales, and disputes are subject to its courts. Contact: support@paulconeng.shop.