Amplitude vs PostHog

Pick Amplitude if analytics depth is the job and you have outgrown a free tool. You get the richest behavioural analysis on the market, machine-learning predictions for churn and audiences, and a polished surface a product manager or growth marketer can use without writing SQL. It is the safer call for a larger product team that wants enterprise tooling, an account manager, and session replay, flags and experiments alongside the analytics, and that can absorb pricing which climbs with monthly tracked users. Do not pick it if you need to self-host or keep data on your own infrastructure, that option does not exist here.

Pick PostHog if you want one platform instead of a stack of point tools, and you are comfortable on an engineer-first surface. You get product analytics, session replay, feature flags, experiments and a built-in data warehouse together, a free tier generous enough to run a real product on, and the option to self-host the open-source core. It is the natural choice for product-led and engineering teams who live in SQL and want to own their data. Go in clear-eyed on two things: the usage-based bill is harder to predict at scale, and the self-host path, while real and MIT-licensed, is unsupported and limited to free-tier capabilities.