In the field of influencer marketing, audience overlap maps are important tools for planning. They help brands and agencies understand where their audiences intersect with the followers of different influencers, thereby helping to create more effective collaborations and campaigns.

Several influencer marketing platforms provide this feature. Here are some notable examples:

1. Flinque: Flinque provides a comprehensive audience overlap map, helping brands understand where there might be commonalities in their audience and that of potential influencers. It helps brands to make informed decisions when selecting influencers for a campaign.

2. Traackr: This platform includes an audience demographic analysis feature, which includes audience overlap insights.

3. Klear: Klear provides deep audience insights and raw analytics to visualize overlap or similarities between influencers’ followers and a brand’s target demographic.

4. Upfluence: Upfluence’s audience analysis feature includes measuring audience interests, which can indicate potential overlap areas.

5. NeoReach: This platform offers audience demographic data and psychographics to identify overlap with influencers’ followers.

Each platform has its unique approach to providing audience overlap insights. The choice of one over another is based on specific needs and objectives. The key is to find the platform that best answers your strategic questions and supports the achievement of your networking or campaign goals.

As always, it is recommended to take these tools in context, as part of the toolkit that brands and influencers need for effective and efficient influencer marketing. Understanding your own audience is the first step, and these platforms can then provide additional insights into where audience overlap may occur.