Mixpanel's pricing page opens on a free plan that stays free: unlimited seats, up to 1M events a month, 10K session replays, 1,000 monthly experiment users and 10 active feature flags, with funnels and retention analysis included. Past that, the page pushes you to a calculator rather than a fixed table: at 18M events a year it shows $120 a month on annual billing and $140 paid monthly, a difference of $480 a year. The Growth tier lifts the ceilings to 20M events a month, 500K replays and 50 active flags. Enterprise is a quote, listed against up to 1T events a month and dedicated account support.
TL;DR
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.
PostHog's page leads with a different claim: 97% of its companies never pay. The free tier resets every month with no card on file and covers each product separately - 1M analytics events, 5K session recordings, 1M feature flag requests, 100K error-tracking exceptions, 1,500 survey responses, 1M warehouse rows, 10K events through data pipelines, 100K AI observability events, 500 PostHog AI credits worth $5 and 10GB of logs. One project and one year of retention are the trade-offs. A card unlocks pay-as-you-go: the same free allowance, then charges for what you use above it, six projects, seven years of retention and email support.
The honest difference is scope and billing shape. Mixpanel meters one thing - events - and its Growth price is predictable because the calculator publishes it at your event volume. PostHog meters a dozen things, keeps each one cheap enough that most small products never leave the free tier, and puts a billing limit on every product so a traffic spike cannot run up a bill you did not choose. Teams that only need product analytics and want a single line item tend to stay on Mixpanel; teams that also want replay, flags, errors and a warehouse in one account tend to pick PostHog and accept the usage math.
| Feature | Mixpanel | PostHog |
|---|---|---|
| Free tier | Unlimited seats, 1M events/month, 10K session replays, 10 feature flags | Every product free monthly: 1M events, 5K recordings, 1M flag requests, 100K exceptions |
| Entry paid price | Growth: $120/month billed yearly at 18M events/year ($140 monthly) | Pay-as-you-go: free allowance first, then usage per product, with per-product billing limits |
| Mid tier | Growth lifts limits to 20M events/month, 500K replays, 50 flags | Same pay-as-you-go; add a card for six projects and seven-year retention |
| Top tier | Enterprise by quote, up to 1T events/month with dedicated support | Annual plans and volume discounts for heavy usage, arranged with an engineer |
| Billing axis | Events, priced at a published rate for your volume | Per-product usage: events, recordings, exceptions, rows, credits |
| Session replay | 10K/month free, 500K/month on Growth | 5K recordings/month free, then usage |
| Experiments and flags | 1,000 monthly experiment users free, 5,000 on Growth; 10 then 50 feature flags | 1M flag requests/month free; experiments billed with flags |
| Data retention | Not stated on the pricing page for free or Growth | One year on free, seven years on paid; custom log retention at $0.05/GB a month |
Pick Mixpanel if
Mixpanel fits teams that want one product analytics tool with a price they can point to: the calculator publishes $120 a month at 18M events a year, the free plan covers up to 1M events with unlimited seats, and funnels, retention and saved reports come standard. If replay, flags and error tracking are handled elsewhere - or not needed - paying for a single metered product keeps the bill legible.
Pick PostHog if
PostHog suits teams that would otherwise buy four subscriptions: analytics, replay, feature flags and error tracking each arrive with a free monthly allowance, and the same account adds experiments, surveys, a warehouse and logs. It rewards products that stay under the free ceilings and punishes no one with surprise invoices, since every product carries its own billing limit. Expect to trade some depth per product and a usage-shaped bill for that breadth.
No ratings, review scores or user quotes appear here: we did not collect a public review corpus for this pair. Mixpanel's own site displays a 4.5 out of 5 score from 1,300+ reviews and PostHog states 97% of its companies pay nothing - vendor-published figures, not independently checked. All prices were read from mixpanel.com/pricing and posthog.com/pricing on 2026-10-13.
For most small products, yes: PostHog's free tier resets monthly with 1M events, 5K recordings and 1M flag requests and never expires. Mixpanel's free plan also covers 1M events a month, but replays stop at 10K and flags at 10. Past those ceilings Mixpanel publishes $120 a month at 18M events a year, while PostHog charges usage per product above its allowances.
Both sell replay with different allowances: Mixpanel includes 10K replays a month on free and 500K on Growth; PostHog includes 5K recordings a month on free and bills usage above that. Teams whose main need is replay with heavy volume hit published ceilings on both.
Yes on both. Mixpanel's free plan is listed as free forever with no card; PostHog states its free tier requires no credit card and is not a trial, and the same monthly allowance applies whether or not a card is on file.
PostHog sets a billing limit per product, so extra events past the limit stop rather than accumulate; on the free plan over-limit events are dropped. Mixpanel's Growth plan is priced at your event volume through its calculator, with volume discounts arranged for larger counts.
PostHog states one year of retention on free and seven years on any paid plan, with custom log retention at $0.05 per GB a month. Mixpanel's pricing page does not state retention lengths for its free or Growth plans.
Spot an outdated price or feature? Let us know and we'll verify it.