The best alternatives to Serenity Shield

Coinkite Tapsigner is an NFC-powered Bitcoin hardware wallet in a credit card form factor. The private key is generated inside the card and never leaves it — transactions are signed by tapping the card on an NFC-enabled phone. It works with Nunchuk, Sparrow, Bitcoin Keeper, and Cove wallets for mobile and desktop.

Inheriti is a decentralized data protection platform that enables users to securely backup passwords, PINs, private keys, and crypto assets. It offers tamper-proof encrypted backups and controlled digital inheritance planning, ensuring your digital legacy reaches the right hands through a patented Secure Share Distribution Protocol.

Vault12 Guard is a non-custodial mobile app that provides secure decentralized backup and inheritance for crypto wallet seed phrases and private keys. It uses quantum-resistant cryptography and a peer-to-peer network of trusted Guardians to eliminate single points of failure, with no cloud storage or server dependency.

Carta Wallet is an NFC-powered cold wallet in a card form factor that keeps private keys stored offline on enterprise-grade NXP smart chips. With no batteries or USB required, it supports 10,000+ tokens across 10+ blockchains and enables transactions by simply tapping the card to an NFC-enabled phone.

Nunchuk is a Bitcoin multisig wallet platform that combines cutting-edge security with inheritance planning. It supports multi-signature wallets with extensive hardware compatibility, enabling users to eliminate single points of failure while maintaining full self-custody without KYC. Pioneering autonomous Bitcoin inheritance with on-chain timelocks designed to outlive the company itself.

DGLegacy is a digital legacy planning and inheritance app that helps you catalog your digital, financial, and crypto assets, designate beneficiaries and trustees, and ensure your loved ones are informed about and can locate your assets in the event of an unforeseen event. Its Heartbeat protocol detects fatal events and triggers proactive beneficiary notifications.

D'CENT All-in-One Wallet is a credit card-sized NFC cold wallet with a bank-grade certified secure chip for storing private keys offline. It supports Ethereum and 50+ EVM-compatible blockchain networks, enabling tap-to-sign transactions via NFC on a smartphone through the D'CENT mobile app.

Satochip is an NFC-powered hardware wallet in a credit card form factor, equipped with an EAL6+ certified secure element for generating and storing private keys offline. It supports Bitcoin, Ethereum, and 1,000+ cryptocurrencies via NFC tap or smart card reader, and is fully open source under the AGPLv3 license.

The ELLIPAL X Card is an NFC-based cold wallet that generates and stores private keys inside a CC EAL6+ certified secure chip. It supports 10,000+ tokens across 10+ blockchains, with transactions signed by simply tapping the card on your phone via NFC — no battery, charging, or firmware updates required.

CoolWallet Go is an NFC-powered crypto hardware wallet in a credit card form factor from CoolBitX. It features a CC EAL6+ certified secure element that generates and stores private keys offline. Battery-free and powered entirely by NFC, users tap the card to their phone to sign transactions via the CoolWallet App.