ChurnBlocker

Overview

ChurnBlocker is an AI-powered failed payment recovery agent designed for SaaS operators and subscription businesses losing revenue to involuntary churn. It automatically detects failed Stripe payments, sends personalized recovery emails via Gmail, and follows up with SMS reminders via Twilio if invoices remain unpaid after 48 hours. By catching payment failures before customers leave, ChurnBlocker helps recover an average of 9% in monthly recurring revenue (MRR) that would otherwise be lost.

How It Works

1. Detect Failed Payments (Stripe) — Continuously monitors your Stripe account every 6 hours or via webhook trigger, identifying all invoices with past_due status and open amounts from the last 24 hours.

2. Retrieve Customer Details (Stripe) — Pulls full customer information including name, email, and account metadata to personalize outreach.

3. Retrieve Subscription Context (Stripe) — Fetches the customer's active subscription plan, billing cycle dates, and renewal amount for context.

4. Check Payment Method Status (Stripe) — Verifies whether the customer has saved payment methods on file, distinguishing between expired cards and missing payment information.

5. Generate Personalized Recovery Email (Claude Sonnet) — Uses AI to craft warm, non-threatening recovery emails that acknowledge the payment issue, explain how to update payment details, and include a direct Stripe customer portal link.

6. Stage Recovery Email Draft (Gmail) — Saves the generated email as a Gmail draft for 30-second human review before sending.

7. Send SMS Follow-up (Twilio) — If the invoice remains unpaid after 48 hours, automatically sends a friendly SMS reminder with the payment update link.

8. Alert Revenue Team (Slack) — Posts detailed notifications to your #revenue channel with failed payment amounts, customer names, and recovery email status.

Key Features

• Automated Detection & Response — Catches failed payments in real-time via Stripe webhooks or scheduled scans, eliminating manual review delays.
• AI-Powered Personalization — Claude Sonnet generates warm, contextual recovery emails tailored to each customer's subscription and payment history.
• Multi-Channel Recovery — Combines email and SMS outreach for higher engagement, with intelligent 48-hour follow-up timing.
• Human-in-the-Loop Safety — Draft emails are held for brief review before sending, ensuring tone and accuracy without slowing recovery.
• Revenue Intelligence — Slack alerts keep your team informed of payment failures and recovery progress, enabling real-time intervention.

Use Cases

• SaaS Subscription Businesses — Retain customers whose recurring subscriptions fail due to expired or declined cards, recovering thousands in monthly revenue.
• Freemium-to-Paid Conversion — Automatically recover failed payments from recently upgraded users before they churn or downgrade.
• Enterprise Billing — Handle high-volume invoice failures at scale with personalized outreach, reducing manual collections workload.
• Multi-Currency Platforms — Detect international payment failures and send localized recovery outreach, improving retention across global customer bases.