ToothPaste is an open-source hardware+firmware project enabling encrypted wireless clipboard transfer to air-gapped devices via BLE and USB, targeting BIOS access and security pentesting scenarios. The GitHub repo shows 178 stars and minimal velocity (5 HN points), indicating niche interest but no mainstream adoption signals.

One insight: This is a developer tool/security project with zero revenue indicators and strong open-source positioning—copyable firmware exists but hardware differentiation (cryptographic coprocessor) and regulatory complexity make fast-following risky; venture potential is low unless a security company vertical emerges.