I suspect that most apps have a way to turn this off. Slack certainly does. That doesn't stop other users from seeing previews of your links, if it's set up t

I suspect that most apps have a way to turn this off. Slack certainly does. That doesn't stop other users from seeing previews of your links, if it's set up that way for them, but it does prevent you from seeing previews of others' (and your own) links.