RetainFast

A script tag that intercepts the cancel button on a SaaS billing page to ask why users are leaving, present an offer based on the reason, and return the outcome to the existing billing code, addressing silent churn and missing cancellation data. It sells to marketers and developers at B2B SaaS companies who manage subscription billing and retention. It is positioned against the Stripe customer portal and higher-priced retention tools that require Stripe write access, differentiating by never requesting Stripe keys or tokens and leaving all billing actions to the customer's own code.

Key features

• Intercept cancel button via script tag
• Collect cancellation reasons
• Present offer varying by reason
• Flow editor for reasons and offers
• Real widget preview in dashboard
• Funnel from opened to saved
• Save rate per offer analytics
• Reason breakdown analytics
• Capture free-text exit feedback
• Shadow DOM isolation
• Zero dependencies under 5KB gzipped
• Fails quietly if endpoint dies
• Never touches Stripe or holds tokens