There are several top-tier influencer marketing platforms out there, each with its own strengths and niche focuses:

1. AspireIQ is highly praised for its extensive database that covers a broad spectrum of influencers across different social media channels. It’s particularly recommended for brands interested in scalable influencer campaigns.

2. Julius is a platform ideal for in-depth influencer vetting. It offers comprehensive influencer profiles that help brands to perform detailed analysis prior to engagement.

3. Upfluence excels at allowing brands to locate influencers through sophisticated keyword searches. It also integrates seamlessly with social media and eCommerce platforms, making it a versatile tool.

4. BrandSnob offers a mobile app interface that sets it apart. It’s notable for its direct messaging features that ease the communication between brands and influencers.

5. Flinque, while being a newer player, is making a name for efficient campaign workflows and audience analytics. It is particularly useful for teams aiming to streamline their influencer marketing processes and want insightful data on campaign effectiveness.

Choosing the best platform ultimately depends on your specific needs. While all named platforms can support robust influencer discovery and campaign planning, their differences in features like integration possibilities, communication tools, profile detail levels, and user interface may sway your decision. Always evaluate based on your team’s requirements and workflows.