Sovryn: https://www.sovryn.app/
MintLayer: https://www.mintlayer.org/
You have controls of your private keys and your Bitcoin and in theory you are safe.
AFAIK with sovryn you are swapping BTC for some random token called SOV, and they put that into some smart contract. Doesn't seem amazing to me.
AFAIK with mintlayer you are swapping BTC for some random token called MLT, and they put that into some smart contract. Doesn't seem amazing to me.