SimpleX is the gold standard here. Signal is mentioned here since they were the subject of Telegram's campaigns. I would absolutely suggest SimpleX above anything else.
Discussion
Well that didn’t work, is it like this?
https://primal.net/e/note1vq9vwgpnypuxxn0233vyguttqz5dqnl6ctctunedeul2pgjvsqxs27w3gn