// 5 comparisons in Analytics
PostHog and Supabase are not substitutes. PostHog is where your product's behaviour data lands - events, session replays, errors, feature flags. Supabase is the Postgres database your application runs on. Both ship a genuinely useful free tier, both are priced by usage afterwards, and most teams end up running the two together rather than choosing one.
Plausible sells one thing: privacy-friendly website analytics. A single script, no cookies, an EU-hosted dashboard, and three published prices - Starter $9 a month for one site, Growth $14 for three sites and three team members, Business $19 for ten sites, ten members, five years of retention and a Stats API - with yearly billing taking two months off. PostHog is a product suite that includes web analytics as one module: its free monthly allowance covers 1M events, 5K session recordings, 1M feature flag requests and 100K error-tracking exceptions with no card, and paid usage above that is billed per product. Choose Plausible if the job is pageview analytics for a marketing site and you want a bill that stays between $9 and $19 a month; choose PostHog if web analytics sits alongside product analytics, replay and flags in the same account.
Mixpanel sells product analytics: a free plan capped at 1M events a month, then a Growth plan whose pricing calculator shows $120 a month billed yearly (or $140 month to month) at 18M events a year, with an Enterprise tier quoted against dedicated support. PostHog sells a suite - analytics, session replay, error tracking, feature flags, experiments, surveys, a warehouse and an AI product - and puts a free allowance for every one of them on the same monthly reset: 1M events, 5K recordings, 1M flag requests, 100K exceptions, 1,500 survey responses. Pick Mixpanel if you want one polished analytics product and will pay past 1M events a month; pick PostHog if you want the wider toolset and can live with per-product limits and usage billing.
Amplitude gives 2 million events a month away on Free with unlimited seats, 10,000 session replays and no time limit, then sells Plus from $0 with the first 2 million events free to a 70 million event ceiling; Growth and Enterprise are event-based quotes. PostHog runs a free allowance on every product, then a pay-as-you-go plan with the same allowance, per-unit charges above it and a billing limit per product: 1 million analytics events, 5,000 recordings and 1 million flag requests a month. Pick Amplitude for the higher ceiling; pick PostHog for one allowance spanning replays, errors and flags.
Amplitude gives away 2 million events a month on Free with unlimited seats, session replay, flags and experimentation included, then moves to Plus — starts at $0, first 2 million events free, scaling to 70 million events — before Growth and Enterprise, which are quoted on event-based pricing. Mixpanel gives away 1 million events a month on Free and prices Growth from $0, with an estimator that shows $120 per month on annual billing (or $140 month-to-month) at 18 million events per year. Neither company publishes a per-seat price, so the honest comparison is the free ceiling, the shape of the meter and what the enterprise tier adds.