mSigna

mSIGNA is a next-generation multisignature wallet. It supports the best security practices in the industry and is rated amongst the most secure wallets by bitcoin.org.
While an advanced tool, it is easy to use. It is very fast, and its inherent scalability offers enterprise-level solutions. And best of all, it's free and open source.

mSIGNA gives you full control over your own bitcoins. Easily synchronize accounts across many devices, set up joint accounts with other people across your organization, do escrow, and use multifactor authentication.

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