Funnels & conversion
Funnels are the headline feature, but rebuilding one against a 100M-event dataset means watching the spinner or upgrading the plan.
What people actually say
✕Query performance concerns surface at scale — some analytics tools sample data or slow noticeably past 10M events per month, and large Mixpanel projects hit similar friction.
Source: Userpilot, Mixpanel reviews 2026 ↗✕Setting up comprehensive tracking requires significant technical effort, and poorly designed event schemas create data-quality problems that compound across funnels and reports.
Source: Crazy Egg, Mixpanel review ↗✕Reviewers note Mixpanel's interface is well designed but pricing tiers force smaller teams to either over-track and overspend, or under-track and break their funnels.
Source: Hackceleration, Mixpanel Review 2026 ↗
Funnels are a parameterised SQL query against your Postgres event table, cached in Redis and rendered by a small Next.js dashboard. ClickHouse drops in if volume grows. No retention-window upsell, no sampled approximations — your funnel is the real numbers.