ChurnLens vs RedChurn

ChurnLens is a self-hosted SaaS metrics tool for calculating MRR, churn, and LTV from Stripe or CSV data. Its full report includes current MRR, ARR run-rate, active customers, average customer churn, and monthly figures such as net-new MRR and LTV. The `mrr` command breaks the latest month’s MRR movement into new, expansion, reactivation, contraction, and churned amounts. Reports can return JSON and use a chosen currency label, with USD as the default.

ChurnLens can recompute metrics from ledger updates and publish JSON to a BI or dashboard pipeline. It also lists SARIF output for code scanning, an MCP server for AI agents, and webhook forwarding for SIEM, Slack, and Jira. The README describes use through MCP, JSON piped into agents or LLMs, or CI with exit codes and SARIF. Installation options include pip, pipx, uv, Docker, Homebrew, and a shell script. It requires no account. The source-available license permits personal, internal evaluation, research, and educational use; commercial or production use requires a separate license. Pricing is on request.

RedChurn is a subscription analytics and retention platform for mobile apps. It tracks MRR, churn, trials, and cohorts, and automates flows for billing recovery, cancellation saves, trial retention, and win-back. Billing issues detected through webhooks can trigger dunning emails or an in-app card-update prompt at the subscriber’s next app opening. Cancellation tools include native iOS and Android save screens and email follow-ups within 48 hours. Trial cancellation flows can send J-3 and J-1 reminder emails and offer an in-app save flow. For expired subscriptions, multi-step emails and in-app prompts can encourage a return, with reactivation tracked in Red Center. The dashboard provides live metrics and segments by country, store, and plan, plus retention-flow and save attribution. Integrations listed are RevenueCat, Superwall, and Polar; email and in-app flow support varies by integration. Starter is free, billed monthly, for up to 50 active subscribers and one app, with 30 days of retention history. Growth is listed as available from 500 subscribers.