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Amplitude

Freemium

Amplitude is a product analytics platform aimed at teams that want behavioral insight without writing SQL for every question. It covers event tracking, funnels, retention, cohorts, user paths and dashboards, with experimentation and audience syncing on higher plans. The data model is built around events and user properties, so the same instrumentation powers multiple analyses. A free tier supports early products, and pricing scales with event volume and advanced features. It is commonly used by product and growth teams at SaaS companies that need to connect feature usage to conversion and retention.

Mixpanel

Freemium

Mixpanel is an event-based product analytics platform. Teams instrument actions such as sign-up, invite or upgrade, then analyze funnels, retention curves, cohorts and user paths. Reports can be filtered by properties and segmented on the fly, and the interface is built for non-technical product managers as much as for data teams. Session replay and experimentation are available on higher tiers. A free plan covers a limited monthly event volume, with paid plans scaling from there. It is a good fit for SaaS products that need to understand activation and retention rather than just page views.

PostHog

Freemium

PostHog bundles product analytics with tools that usually live in separate vendors: session replay, feature flags, experiments, surveys and a data warehouse. Events are captured through SDKs, then explored with funnels, retention and cohort queries. Feature flags and experiments connect the analysis to what users actually see. It can be used in the cloud or self-hosted, which matters for teams with data residency requirements. A generous free tier covers early-stage products, and pricing scales by events and features. It suits engineering-led teams that want one instrumented pipeline instead of four overlapping tools.