No official phone numbers are published by Opendime. All communications are through email and social channels.
Opendime is a product line developed by Coinkite, a Canada (CA)–based company specializing in Bitcoin security hardware. Marketed as a “Bitcoin bearer bond” or USB stick piggy bank, Opendime is a small, disposable Bitcoin hardware wallet designed for physical transfers of Bitcoin. Unlike traditional wallets, Opendime allows users to hand over Bitcoin like cash — the private key is sealed and undisclosed until the device is “unsealed.” This makes it ideal for private peer-to-peer transactions, gifts, or cold storage in a physical form factor.
Bitcoin-Only Device: Focused solely on BTC for maximum security.
Physical Bitcoin Transfer: Functions like a cash note that can be passed between parties.
Unbreakable Seal: Private key remains unknown until the device is unsealed.
USB Connectivity: Plug-and-play for verifying balance and history.
No Setup Required: Ready to use directly out of the box.
Trustless Design: Users don’t need to trust anyone — the private key is created inside the device.
Durable & Compact: Portable USB stick design.
Batch Packs Available: Sold in packs of 3, 5, or more for convenience.