Tangem

Safe{Wallet} is a multisignature smart wallet for secure self-custody, onchain treasury management, and organizational transactions. It distributes control across multiple owners using configurable N-of-M approvals, helping avoid a single point of failure; signers can include Ledger and Trezor hardware wallets. The wallet supports transaction simulation and risk scanning, spending limits and approval roles, multi-chain account management, DeFi and protocol interactions, and transaction bundling. Safe describes its contracts as open source and formally verified, and provides features including trustless recovery, transaction guards, and monitoring through Safe Shield.

American Fortress is a private cryptocurrency payments platform described as a private PayPal for crypto. Users register human-readable Fortress names instead of wallet addresses, and the system derives unique stealth addresses for sender-recipient pairs across supported blockchains, including Solana, Cardano, Tron, Arbitrum and Litecoin. The platform uses zero-knowledge proofs of provenance so recipients can verify the sender, while its Safe Send feature routes payments through a shielded pool to obscure balances. The videos also describe encrypted chat, KYC integration represented as post-quantum cryptographic proofs, and distribution through a wallet app, desktop and Windows applications, an SDK, and a MetaMask Snap.

Ledger is a hardware cryptocurrency wallet and digital-asset management platform. Its hardware signers are used to manage and authorize transactions for cryptocurrencies including Bitcoin, Ethereum, Solana, XRP, stablecoins and other supported assets, while Ledger Wallet provides functions such as buying, swapping, staking, spending and portfolio tracking. The platform also compares rates from cryptocurrency providers across multiple chains and offers services including Ledger Recover.

Securo is an open-source, self-hosted personal-finance manager developed by securo-finance. It keeps financial data on the user's infrastructure and provides multi-account management, transaction search and CSV export, imports for OFX, QIF, CAMT, and CSV files, categorization rules, recurring transactions, budgets, savings goals, asset valuation, reports, multi-currency conversion, and optional bank synchronization through Pluggy, Enable Banking, or SimpleFIN. The application supports multiple users, passkeys, TOTP two-factor authentication, and OIDC single sign-on. An optional AI-agent profile adds self-hosted chat over Securo data, tool use through MCP, multi-provider support, and a per-agent RAG knowledge base. It can be deployed with Docker or Podman, uses a FastAPI and PostgreSQL-based stack with Redis and Celery, and is licensed under AGPL-3.0.

Ether.fi Cash is a crypto-backed savings and payments product from Ether.fi that pairs a yield-bearing crypto/stablecoin account with a payment card. Users deposit crypto or stablecoins into the Cash account to earn yield and can spend via a virtual or physical card that advertises cashback; the product also advertises borrowing against deposited collateral and trading tokenized assets. The service is delivered through Ether.fi's web and mobile app and requires a verified account (KYC).