For PostHog alternatives, start from the product questions you answer, not the number of dashboards. PostHog can connect analytics with flags and replay; a replacement may split those workflows.
- Send a documented sample journey through both systems.
- Compare identity merging, event properties, funnels, retention, and timezone boundaries.
- Test feature-flag evaluation and rollback separately if flags are in use.
- Review replay privacy, masking, consent, retention, and access roles.
- Export raw events and saved definitions before considering cutover.
Run reports in parallel for a period. If numbers differ, trace an individual event and the calculation rule before choosing which is correct.