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I think it's still difficult to beat LI when it comes to B2B marketing. Not in all cases perhaps, but in a large majority. Also, Twitter may be worth looking into.
@price2spy I agree wrt twitter. I think it is underappreciated and I might be wrong here, but the connections there might be more genuine and friendlier.
Linkedin, using hashtags to identify influencers. Each hashtags has a curated feeds with influencer speaking about, for example: https://www.linkedin.com/feed/ha...
Linkedin Hashtag Trend can help you identify good hashtags to target.
Phantombuster can help you extract the list of influencers.
I think it depends on the kind of business one is running. If it is related to something B2B then the best platform is LinkeIn but if it is small business that we see day to day on Instagram, then we can get good influencers from the same platform itself.
Has anyone tried Youtube? We have got pretty good results with it since I feel the crowd out there is not yet too saturated.
Obviously, LinkedIn is kind of a safe bet but I would highly suggest you to try out something on Youtube also.