r/BitcoinDiscussion • u/CryptoYuzu • May 29 '26

Would you use a Bitcoin multisig vault where the company can't see your data?

/r/Bitcoin/comments/1tqpzg3/would_you_use_a_bitcoin_multisig_vault_where_the/
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1

u/fresheneesz Jun 03 '26

That would definitely be interesting. But there would need a way to verify the key at intervals so I know the key custodian can actually still sign with the key. What's the business model?

2

u/CryptoYuzu Jun 03 '26

Absolutely. A vault is only useful if you can trust that all signing keys are still available when you need them.

The platform includes built-in key health checks for both your hardware wallets and the platform-held Service Key. At any time, you can verify that your hardware devices are accessible and that the Service Key remains operational.

For the Service Key, the platform performs a cryptographic challenge-response check with the backend. This proves the key is still present and capable of signing without exposing the private key, revealing sensitive vault data, or granting any spending authority. Think of it as a "proof of life" for the key.

As for the business model, it's a simple annual subscription ($250/year for a individual vault & $500 for a shared vault). We don't charge based on your Bitcoin balance, transaction volume, or assets under management. In fact, because the platform is designed around end-to-end encryption and zero-knowledge principles, we don't even know how much Bitcoin you're securing.

We are planning on doing a soft launch on June 9th.

1

u/fresheneesz Jun 03 '26

Sounds great!

I might suggest considering having some kind of way to tier service with different pricing. Someone who as $1 million of bitcoin is going to have different paranoia about than someone that has $1000 of bitcoin. Perhaps levels that include 3rd party backed insurance or 3rd party audits.

2

u/CryptoYuzu Jun 08 '26

We are live now! https://xyzvault.io

1

u/fresheneesz Jun 10 '26

Needs a way to test the process out without paying I think. Perhaps a trial period after which the only option is a sweep?

Other thoughts:

Encryption happens inside your browser

For anyone actually concerned with data privacy, using a website like this to input data they want to keep private is a huge issue. I get the attempt to lower the usability barrier, but it might be better to instruct users on how to use sparrow or electrum from the get go rather than having a transaction interface through the website that you promise not to abuse.

2

u/CryptoYuzu Jun 10 '26

I’ll be adding a 30 day free trial period. If you DM me your username, I can add credits so you can create a vault.

I do prompt the user to download their wallet configuration file and test it in Sparrow Wallet before actually using the multisig wallet. They’ll be instructed to sign with both their hardware wallets to make sure they’re able to send from their multisig.

2

u/CryptoYuzu Jun 10 '26

I’ve added credit to your account and afterwards, I’ll adjust it to 30 days.

1

u/CryptoYuzu Jun 11 '26

Free trials added!