Is LinkedIn Sales Navigator the Best Tool for Finding Target Audiences?

Is LinkedIn Sales Navigator recommended? Hi everyone, I'm currently trying to find my ideal target audience on LinkedIn. I already have about 5 clients, and ideally, I would like to use them as input to find similar profiles (lookalikes), or otherwise just use classic filtering. I'm only familiar with LinkedIn Sales Navigator. I tried it once, but I lacked features, it didn't provide much value for me. I see other tools out there now, so I wanted to ask if this kind of search is possible with other tools, or if that is exclusive to LinkedIn Sales Navigator. What do you guys use? How do you search for leads? Greetings from Bavaria (Germany)