Statsig vs PostHog vs Amplitude pricing and Statsig competitors compared on cost per event, flags and experiments

On the published numbers, Statsig Pro is cheaper than Amplitude Plus at every volume Amplitude still prints: $4,800 against $6,912 a year at 10 million events, and $10,800 against $15,120 at 20 million. Above 20 million Amplitude stops publishing, although Plus itself scales to 70 million events.

The bigger difference is what each paid entry plan lets you test. Amplitude's plan table lists feature flags as unlimited on every plan, but for feature experimentation it lists A/B/n testing and experiment results as not included on Free and Plus, with one active experiment. Growth and Enterprise include them, with two active experiments and more as an add-on. Statsig includes A/B tests, Bayesian and frequentist stats and no-code experiments on its free tier, and adds CUPED, holdouts and multi-arm bandits on Pro for $150 a month.

Amplitude now owns both price lists. Its own Compare menu lists PostHog, LaunchDarkly and Optimizely as rivals and does not list Statsig. For a buyer, that means a Statsig quote is a reasonable anchor in an Amplitude negotiation and the reverse, and it means asking either sales team in writing which product roadmap your contract follows.

Statsig publishes three plans. Developer is free with no card: 2 million metered events a month, unlimited flag and config checks, 50,000 session replays, one year of analytics retention and unlimited seats. Pro is $150 a month and includes 5 million events, then $0.05 per 1,000 events, plus 100,000 replays, unlimited analytics retention, change reviews and API controls. Enterprise is custom, sold on event or experiment based contracts with volume discounts, warehouse-native deployment, SSO and HIPAA eligibility.

Two terms change the real number. Each Pro subscription covers one project, so a company with separate projects pays $150 for each. And overages are billed in arrears: the $150 base is charged at the start of the month, and that month's overage lands on the next bill. Vendr reports a median Statsig contract of $82,500 a year across 87 purchases, between $14,650 and $199,250, with buyers saving 27.69% on average. At Pro list rates, $82,500 buys roughly 140 million events a month, which tells you most of those buyers are on Enterprise.

This is where quotes stop matching. Statsig's metered events are exposures, logged events, ingested metrics and custom metrics. An exposure only counts when you switch on Metric Lifts for a flag in partial rollout, and Statsig dedupes them per user, over 60 minutes on client SDKs and one minute on server SDKs. Flags at 0% or 100% rollout cost nothing. One event dimension rides along free; every additional dimension is billed as another log event, which can quietly double a tracking plan that sends rich properties.

PostHog counts every captured event on its analytics meter and every identified person event again on the add-on meter, and meters flags, replays, surveys and errors separately. Its free allowances do not pool across products. Amplitude counts every action you track as an event and caps Plus at 70 million a month, or 700,000 monthly tracked users on its MTU option. Before comparing quotes, export one month of your own event counts and run them through each definition.

For a team under 2 million events a month that wants real experiments, Statsig's free Developer tier is the most generous of the three. It includes A/B tests, feature flags without limits and 50,000 replays. Amplitude Free also covers 2 million events and unlimited flags, but its plan table does not include feature A/B testing or experiment results until Growth. PostHog Free covers 1 million events and 1 million flag requests, and its experiments run on top of those flags.

Between 2 and 5 million events, Statsig Pro at $1,800 a year and PostHog at about $1,835 for anonymous events are close, and Amplitude Plus is $2,700 at 5 million. Above that, the answer depends on whether your events are identified, as shown above, and on how many flag requests you make.

Buyers who shortlist Statsig usually also look at LaunchDarkly and Optimizely, which Statsig itself names on its pricing page, and at Eppo, now part of Datadog. LaunchDarkly and Optimizely are flag and experimentation specialists that leave product analytics to another tool. Mixpanel and Heap are the reverse: analytics first, with lighter experimentation. Mixpanel prints $0.28 per 1,000 events on its entry Growth plan and caps self-serve at 20 million a month; our Heap vs Amplitude vs Mixpanel page has the full ladders.

If the job is one bill for analytics, flags and tests, Statsig, PostHog and Amplitude are the only three that publish enough to compare without a sales call.

Start with a month of real event counts, split into anonymous and identified, plus your monthly flag requests. Those three numbers price all three vendors and stop either sales team from quoting on assumptions.

Ask Statsig whether exposures for experiments you have finished keep counting, how extra event dimensions are billed in your contract, and whether the Enterprise rate is fixed for the term now that Statsig belongs to Amplitude. Ask Amplitude which experimentation features your plan includes and how many active experiments, because that limit is what pushes buyers from Plus to Growth. With PostHog, use the billing limits it offers per product so a spike cannot run up the bill, and check that identified events are switched on only where you need person profiles.

Statsig, PostHog and Amplitude tell you what users did and which variant won. None of them reads the support tickets, app store reviews and survey comments where customers say what is wrong, and ties that to what those same customers do in the product.

UserInsight does that part. It groups every piece of feedback into themes, counts the customers behind each theme, and links each one to usage, so a failed experiment or a churn spike comes with the reason attached. It sits next to whichever of the three you choose, on one plan price that does not move with your event volume.