PostHog

Free product analytics: 1M events and 5K session recordings a month, unlimited team members.

PostHog is an all-in-one product analytics platform: it shows what people do in your app or on your site, records sessions so you can watch real visits, and lets you test features before rolling them out. It's for founders building a SaaS, app or product site. The free plan includes 1M analytics events, 5,000 session recordings, 1M feature-flag requests and 1,500 survey responses a month, with unlimited team members, and usage stops at the free limits so there are no surprise bills.

What it can do for you

See where people drop out of your sign-up flow, watch recordings of confused users, and ask a quick in-app survey question, all in one tool. Feature flags let you switch features on for a few users first. There's also PostHog for Startups, which gives $50,000 in credits to eligible young companies on a paid usage plan.

What people like

G2 reviewers and Reddit users praise the free tier's size and the value of having analytics, replay, flags, experiments and surveys in one place instead of paying for several tools. Developers like how flexible event tracking is.

The honest downsides

It has a learning curve. Reviewers say you need to plan which events to track, and non-technical teams can find it overwhelming. One Reddit thread is a new user's rant about the interface.
Costs rise with volume. Once you move to paid usage, Reddit users report bills climbing quickly at high event volumes.
One project on free. Separate products need separate tracking setups or a paid plan.
Self-hosting is hard work. It's possible but not a casual job.