BillSensor

BillSensor detects SaaS billing emails as you browse Gmail and alerts you 7 days before renewal charges. No Gmail account connection or OAuth required. Also supports Outlook and Microsoft 365 via a one-time connected scan covering 12 months of billing history. Scores 62 SaaS tools on dark billing patterns, provides direct cancel links for every detected subscription, and flags charges that appear after you've already cancelled. Free plan includes unlimited detection and Chrome renewal alerts. Pro plan adds email alerts, cloud sync, and cancellation records as PDF.