PostHog, an all-in-one product development platform, has released a fully open-source version of its toolset, named `posthog-foss`. This version removes all proprietary code, offering a community-driven alternative for product teams.

PostHog FOSS includes features such as product analytics with SQL querying, web analytics with GA-like dashboards, session replays, feature flags, A/B testing capabilities, error tracking, and survey tools. It also integrates with external data sources and offers data pipelines for real-time processing. A new AI observability feature captures traces, generations, latency, and costs for LLM applications.

Users can opt for PostHog Cloud, which offers a generous free tier for up to 1 million events monthly, or self-host a hobby deploy using a single Docker command. The self-hosted option scales to roughly 100,000 events per month, after which migration to the cloud is recommended. The platform supports integration via JavaScript snippets, SDKs for various languages like Python and Node.js, and APIs, with comprehensive documentation available for setup and advanced features.