Newsletrix

Newsletrix is an AI-powered newsletter analytics dashboard designed to help marketers and creators understand competitor email campaigns and improve their own. It tracks newsletters across platforms including Substack, Beehiiv, Mailchimp, ConvertKit, Klaviyo, SendGrid, and HubSpot, then organizes findings into practical insights and recommendations.

Its tools analyze subject lines for length, sentiment, keywords, capitalization, and emoji use; identify email service providers through live DNS checks; and examine sending schedules, campaign patterns, calls to action, links, readability, and content themes. Users can explore send-time heatmaps, campaign calendars, estimated engagement benchmarks, and competitor-specific SWOT analyses based on newsletter content. Additional utilities include a subject line tester, preheader optimizer, hook tester, CTA click predictor, footer compliance checker, personalization token tool, and alt-text auditor.

Newsletrix also offers guides on topics such as spam scores, CTA strength, readability, ESP detection, and send timing. The service promotes prioritized recommendations grounded in observed newsletter patterns, rather than generic best-practice advice. It provides a free plan with no credit card required, alongside paid pricing and demo options.