ChurnLens vs Kometrics

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.

Kometrics connects billing providers, imports billing history, and calculates subscription revenue metrics. Its reports cover MRR, ARR, churn, retention, subscriber growth, ARPA, and LTV; Explore tools include Forecast, Revenue Calendar, Risk Radar, Cohorts, Maps, and Goals. It supports Stripe, Paddle, Creem, and Asaas, backfills historical billing data, then uses signed webhooks to keep data current as renewals, upgrades, and cancellations occur. The AI assistant answers plain-language revenue questions using the same figures as workspace reports. A read-only REST API and MCP connector provide workspace data; the connector supports Claude, ChatGPT, Claude Code, and Codex. Workspaces can enable anonymized mode, replacing customer names with irreversible pseudonyms and dropping email addresses before storage. Imported billing data is removed within 30 days after a source is disconnected or an account is deleted. The Free plan includes every feature while tracked MRR is under $1,000. The One plan costs $19 a month and includes unlimited team members and workspaces.