PostHog

WHAT IS IT?

PostHog is an open source platform that bundles every tool you need to understand how users interact with your product. Instead of stitching together Google Analytics, LaunchDarkly, Hotjar and Amplitude, PostHog ships it all in a single interface — with the option to self-host.

WHY IS IT INTERESTING?

• Genuinely all-in-one : product analytics, web analytics, session replay, feature flags, A/B testing, surveys, error tracking and a data warehouse — no need to juggle ten different SaaS tools
• Open source and self-hostable : the codebase is MIT-licensed (except the ee directory). A Docker hobby deployment handles up to ~100k events/month
• No sampling : data is complete, not sampled. Product decisions are based on real numbers
• Built-in LLM Analytics : dedicated monitoring for AI/LLM applications, a rare addition in the analytics ecosystem
• Data pipelines and CDP : data doesn't stay locked inside PostHog — export to any data warehouse or third-party tool through built-in pipelines

USE CASES

• Understand user journeys and identify friction points in a SaaS product
• Progressively roll out a feature with feature flags and measure its impact via A/B testing
• Replay sessions of users hitting bugs to understand the exact context
• Centralize a startup's entire analytics stack to avoid tool fragmentation and cut costs
• Monitor performance and behavior of applications powered by LLMs