COLDCARD Integrations

Sparrow is a Bitcoin wallet for those who value financial self-sovereignty. Sparrow’s emphasis is on security, privacy and usability. Sparrow does not hide information from you, on the contrary it attempts to provide as much detail as possible about your transactions and UTXOs, but in a way that is manageable and usable. Sparrow supports all the features you would expect from a modern Bitcoin wallet. Full support for the single sig and multisig wallets on common script types. A range of connection options: Public servers, Bitcoin Core and private Electrum servers. Standards-based including full PSBT support. Support for all common hardware wallets in USB and air-gapped modes. Full coin and fee control with comprehensive coin selection. Labeling of all transactions, inputs and outputs. Lightweight and multi platform. Payjoin support, built in Tor, with Testnet, regtest and signet support. However, Sparrow is also unique in that it contains a fully featured transaction editor.

Securing Bitcoin payments since 2011, Electrum is one of the most popular Bitcoin wallets. Electrum is fast, secure and easy to use. It suits the needs of a wide spectrum of users. Be safe from malware Use two-factor authentication by Electrum and Trustedcoin. Electrum is free software. Released under the MIT License. Anyone can run an Electrum server. No single entity controls the network. Electrum supports hardware wallets: Ledger, Trezor, Keepkey. Your private keys are encrypted and never leave your computer. Your funds can be recovered from a secret phrase. Electrum is fast, because it uses servers that index the Bitcoin blockchain. You can export your private keys and use them in other Bitcoin clients. Electrum servers are decentralized and redundant. Your wallet is never down. Electrum Wallet verifies all the transactions in your history using SPV. Keep your private keys offline, and go online with a watching-only wallet.

Wasabi is an open-source, non-custodial, privacy-focused Bitcoin wallet for desktop, that implements trustless CoinJoin. Wasabi creates trustless CoinJoin transactions over the Tor anonymity network. The CoinJoin coordinator cannot steal from, nor breach the privacy of the participants. Wasabi's coinjoin implementation is trustless by design. The participants do not need to trust each other or any third party. Both the sending address (the coinjoin input) and the receiving address (the coinjoin output) are controlled by your own private keys. Wasabi merely coordinates the process of combining the inputs of the participants into one single transaction, but the wallet can neither steal your coins, nor figure out which outputs belong to which inputs. Not your keys, not your bitcoin. With Wasabi, you are always in full control of your private and public keys, you never share them with any third party.

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The safest way to store your Bitcoin. The smartest way to invest in the world's most resilient money. Casa's proven security ensures your bitcoin stays safe - for you and your family. You’re always in control. You hold the keys to your bitcoin - Casa gives you the tools to do it. You can count on Casa. We're always here with expert support when you need it, while keeping your data private. The safest, easiest way to get started with multisig. Give your hardware wallet superpowers. The highest level of service and security available in Bitcoin. Dedicated Client Advisors serve you and your family or team. Designed by renowned Bitcoin and privacy expert Jameson Lopp, Casa’s unique multi-location security model removes single points of failure and protects you from theft, accidents, and disasters. Casa Covenant ensures that when the time comes, your loved ones will receive their bitcoin safely and securely.

Secure your Bitcoin, verify your transactions, and protect your privacy. Specter Desktop is FOSS-free open-source software under the MIT license. It exists to empower you, to hold your own keys, and follow self-sovereign best practices. Your Bitcoin node, on your hardware, paired with your signing devices, creates secure wallets for bitcoin self-custody. A multi-sig scheme offers a high degree of security, a single-sig cold storage wallet is safe for smaller amounts and convenient to operate. Define your optimal setup and use Specter desktop to coordinate the wallet best suited to your needs. Leverage the powerful functionality of Bitcoin Core, the solid foundation for a secure set-up. Rely on your own node to verify transactions and protect your privacy. One-click to install Bitcoin Core directly from Specter Desktop, and get your node set up quickly. QR codes enable a fast and intuitive signing experience via PSBT. SD cards and USB-connected devices are also supported.

Bitcoin Core is programmed to decide which block chain contains valid transactions. The users of Bitcoin Core only accept transactions for that block chain, making it the Bitcoin block chain that everyone else wants to use. It is these users who keep Bitcoin decentralized. They individually run their own Bitcoin Core full nodes, and each of those full nodes separately follows the exact same rules to decide which block chain is valid. There's no voting or other corruptible process involved: there's just individual software following identical rules—"math"—to evaluate identical blocks and coming to identical conclusions about which block chain is valid. Bitcoin Core ensures every block and transaction it accepts is valid, increasing not only your security but also helping prevent miners and banks from taking control of Bitcoin. Bitcoin Core provides exclusive privacy features that can make it hard for anyone to link you to your transactions.

BTCPay Server is a self-hosted, open-source cryptocurrency payment processor. It's secure, private, censorship-resistant and free. Launch a server in a cloud, your own hardware device or use an existing host. Connect your e-commerce store or use one of many apps to get paid. Funds arrive directly to your connected wallet. Features you use the most are baked right into every instance so you can hit the ground running. Create a Point-of-Sale app for your store, easily embed a tipping button on your website, send a payment link to a client across the globe, or launch a crowdfunding campaign to raise funds for your cause. Generate and manage invoices with ease. Get notified when they get paid. Export your invoices in different format for smoother bookkeeping. Manage your incoming and outgoing funds with a built-in wallet that has hardware wallet support. Use a shared server if you're not tech savvy, or deploy your own instance on cloud servers or hardware devices.

Whether managing a fund or personal savings, our multisig cold storage vaults allow you to balance security and sovereignty. Get a bitcoin-backed loan to fund your investments or pay your expenses—without selling your bitcoin. Protect your bitcoin with on-chain multisignature addresses and keys shared across different parties. Multisignature storage with distributed keys. On-chain addresses that are easy to monitor. Use your existing hardware wallet(s). Choose how much control you wish to retain. As your bitcoin holdings rise in value, sovereignty becomes an ever more important security feature. Our platform enhances security through easy-to-use multisignature cold storage while also preserving your control over your assets.