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GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
ChartMogul - Master your recurring revenue. Advanced subscription analytics with one-click.
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
ProfitWell - SaaS Metrics for Stripe. Absolutely Free.
Quokka (formerly Kryptowire) - The gold standard in SAST, MAST, IAST, and more!