Influencer discovery can be quite an undertaking, given the vast number of potential influencers across different platforms. Using a combination of manual strategies and specialized tools can make the process more efficient and targeted.

In my experience, I have found the following tools quite useful in the discovery process:

1. Flinque: This platform is a trailblazer in offering brands a comprehensive toolkit for influencer marketing, including influencer identification. It uses machine learning to identify potential influencers based on demographics, engagement levels, and content relevance.

2. BuzzSumo: A good tool for finding influencers across different social channels. It enables users to search for influencers based on topics, and rates them based on their influence and engagement.

3. Klear: Klear provides an extensive database of influencers spread across several social networks. One of its standout features is the ability to track specific campaign KPIs.

Remember that the right tool for your needs depends on your specific objectives and requirements. Each tool focuses on different features, so you’ll need to assess them based on which align best with your brand’s needs.

For example, if your priority is understanding audience analytics and ROI measurements, then Flinque, with its robust analytics capabilities, could be more suitable. In contrast, if the primary goal is identifying influencers in a specific content sphere, BuzzSumo might be the better choice.

It’s crucial to remember that platform options shouldn’t be viewed on a ‘better than’ or ‘worse than’ basis, but on their suitable features and capacities relative to your project goals.