Best On-Premises Crypto Custodians

BitPolaris Custody is self-hosted digital-asset custody software for exchanges, brokers, and payment businesses that need to manage private keys and wallet operations within their own infrastructure. It connects to supported blockchains through bridge and RPC pools, with node and synchronization monitoring. Wallet operations can be organized into hot, warm, and cold tiers, while policy controls support multi-party approvals using hardware keys. A reserve-monitoring function compares internal ledger balances with on-chain balances and can flag deposits that remain pending; proof-of-reserves data can be exported. The software supports hardware security module integrations, custom token additions on supported chains, and standby-site deployment. It is offered under a one-time self-hosted license, with a separate perpetual source-code licensing option.