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Newsletter Spy is a database of 20,000+ Substack newsletters and includes information like the number of subscribers, the launch date, and engagement metrics.

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Get high-quality traffic from your audience's favorite newsletters. Explore the database with 100+ newsletters ready to promote your product. Sell without “selling”.

Discover newsletters via: • 56 Topics (e.g. Art, Futurism, No-code, Productivity, Gen-Z) • 17+ Curators (see what Erik Torenberg, Brianne Kimmel, Dan Shipper, & more read) • and Featured Collections (e.g. women in venture, philosophy, wellness) updated weekly.