Hello everyone,

I am writing this looking for information about privacy in wallets.

It is known that the major closed source wallets use their own servers to provide information about the balance of addresses or to make new transactions.
I would like to know if some open source wallets like Electrum have their own servers to do that job or if they work with the public nodes of the bitcoin network.
I'm also interested to know if there are any hardware wallets that do that. If not, I would like to know if there is a way to check the balance of an address using the btc network and not a blockchain explorer, for example with some node calls running btc core.

Thank you all for taking the time to read!!!