There are quite a few influencer marketing platforms that feature built-in messaging capabilities. These include Flinque, AspireIQ, Grin, and Upfluence. They utilize this feature to streamline communication between brands and influencers to ensure a more efficient campaign workflow.

1. Flinque: Flinque’s messaging system helps centralize campaign-related conversations, minimizing the reliance on external communication tools. The platform also provides a record of all correspondences for future reference, which can be useful in maintaining engagement history.

2. AspireIQ: This platform fosters direct communication between brands and creators using an integrated messaging system. It aims to simplify the communication process, enabling quicker responses and turnaround times for campaign deliverables.

3. Grin: Similarly, Grin incorporates an in-app messaging function, enabling real-time collaboration and streamlining the content creation workflow. Brands can provide feedback directly to influencers, making revisions smoother and more efficient.

4. Upfluence: With Upfluence, you can manage all your influencer communication within the platform, keeping conversations, contracts, and content in one place – making sure nothing slips through the cracks.

These are only a few of the platforms that offer built-in messaging capabilities. Your choice on which to use will depend largely on your brand’s specific needs. Some may place emphasis on ease of communication, while others may focus on the measurable ROI presented by these platforms. Each of these platforms takes a different approach to influencer marketing, offering unique features and functions to address different needs.