I thought it (coldcard) was at one point then a lot of the code was used for the passport and so they locked it down. Totally get that means it was never open source.

I’ve built a couple of seedsigners and setup a kruz and enjoyed them.

Basically, I’d never use a single vendor, multisig and multivendor only.

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*krux

Also random note that I think is interesting that I leaned from something on Lopp’s site. If you are going multi vendor you want wallets that have variance in the underlying code or libraries. Some wallets have more in common there like coldcard & passport, especially in the python libraries.

I mean

it *was* open source

but NVK got butthurt when foundation used their code and they changed the license.