PostHog
Product analytics — session replay, feature flags, A/B testing.
MIT-licensed alternative to Mixpanel with funnels, heatmaps, data warehouse export, and CDP. ClickHouse-powered, self-host or cloud.
Heap (now owned by Contentsquare) is a proprietary product analytics platform that auto-captures every user interaction without manual event tagging, aimed at teams that want retroactive analysis without instrumenting events ahead of time. It's a closed, hosted product — your interaction data lives on Heap's infrastructure, and autocapture-everything approaches like this typically come with corresponding usage-based costs as traffic grows.
If you want session replay, funnels, and feature flags without being locked into a single closed vendor's hosted data pipeline, PostHog is the open-source alternative you can self-host.
FAQ
Is there a free, open-source alternative to Heap?
Yes. PostHog is open source and self-hostable, covering product analytics and session replay without Heap's closed, hosted-only model.
What's the best open-source alternative to Heap?
PostHog is the closest match — autocapture-style event tracking plus session replay and feature flags — with the option to self-host your product data instead of sending it to a third party.
What are the top open-source alternatives to Heap?
Browse all open-source alternatives to Heap above, or explore the full Analytics & Data category for more options.