Understand your subscription business
without the enterprise cost
OpenKaiser gives you the subscription analytics you need to grow your SaaS. Track MRR, ARR, churn, and customer lifetime value. Free forever, open-source, and fully self-hosted.
✓ No credit card required ✓ Free forever ✓ Self-hosted
Everything you need to grow
OpenKaiser provides the same powerful analytics as expensive enterprise tools, but without the cost or vendor lock-in.
MRR & ARR Analytics
Track Monthly and Annual Recurring Revenue with detailed breakdowns. See new business, expansions, contractions, and churn in real-time.
Visual Dashboard
Beautiful charts and graphs powered by Chart.js. Interactive visualizations make your data easy to understand at a glance.
ChartMogul Compatible API
Drop-in replacement for ChartMogul. Change just the base URL and your existing integrations work without any code changes.
Zero Cost Forever
Free and open-source. No per-seat pricing, no usage limits, no hidden fees. Host it yourself and own your data completely.
Self-Hosted & Secure
Your data stays on your servers. Full control over your subscription analytics with enterprise-grade security.
Real-Time Metrics
See your metrics update in real-time as new data comes in. No waiting for batch processing or daily reports.
Built for your needs
We understand the struggles of growing SaaS companies. OpenKaiser solves the real problems you face every day.
Stop overpaying for analytics
Why pay $100s or $1000s per month for subscription analytics when you can get the same insights for free? OpenKaiser gives you enterprise-grade metrics without the enterprise price tag.
Own your data completely
Your subscription data is valuable. Don't lock it in a proprietary system. With OpenKaiser, you host everything yourself. Export anytime, integrate anywhere, no vendor lock-in.
Switch without breaking integrations
Already using ChartMogul? No problem. OpenKaiser's API is 100% compatible. Change one line of code (the base URL) and everything keeps working. Zero migration effort.
Start tracking your growth today
Join thousands of SaaS companies using OpenKaiser to understand their subscription metrics. Free forever, no credit card required.