ChurnLens vs SaaSFlow

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.

SaaSFlow is a finance cockpit for SaaS companies that combines real-time P&L, subscription analytics, and forecasting in one data layer. It categorizes transactions, calculates P&L, and lets users assign transactions to periods for accrual reporting. Subscription metrics include MRR, ARR, CMRR, revenue movements, logo and revenue churn, customer lifetime, and LTV/CAC. Planning tools forecast cash flow and runway, support budgets and plan-versus-actual comparisons, and update forecasts as actual data arrives. Named integrations include Stripe, HubSpot, Finway, Pleo, DATEV Payroll, and Slack; some connect live while others rely on monthly export uploads. Users can connect Claude, ChatGPT, Cursor, or their own agents via MCP, or use a public REST API and CLI. The maker says the product is for decision-making rather than compliance and operates separately from accounting systems. The free plan includes all features, unlimited users, and unlimited data sources up to €120k ARR (€10k MRR). Pro costs €100 a month with annual billing.