Analytics and monitoring
Stellar alternatives
2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.
The projects
growthbook/growthbook★8,105 GitHub starslicence unclearOpen-source experimentation and feature flagging platform with SDKs, visual editor, and analytics.Open on GitHub ↗PostHog/posthog★37,550 GitHub starslicence unclearProduct analytics platform with feature flags, experiments, session replay, and event ingestion.Open on GitHub ↗
What you give up either way
- Priority onboarding, dedicated migration help, and enterprise SLAs
- Built-in AI insights & MCP chat integrations
- Polished heatmaps & funnels as implemented by the vendor
- Scale-ready hosted infra, CDN distribution & DDoS protection
- Cookieless data-handling/legal assurances and a Data Processing Agreement provided by vendor
An open-source project doing the core job proves a replacement is possible. It does not prove it matches Stellar, and it does not prove anyone has run it for a month. How we decide.