When it comes to DMs (purely private interactions), either nostr:npub1hrujuc08r4zcdtn0u6ts7u7apldcjqgftz0z7stmaaz9hwaf9jxs66f3yh or White Noise would be the “top of the top” in security and privacy, but they’re not for public posting, if that’s what you’re looking for. 🙏💚