LaunchDarkly vs Statsig vs PostHog (2026) - Three-Way Pick by Need

These three get shortlisted together constantly, and they shouldn’t be judged on the same axis. LaunchDarkly is the deepest flag platform and bills flags. Statsig is experimentation-first and gives flags away free. PostHog is an analytics suite with flags bundled in. They overlap enough to compete, but they optimize for genuinely different things, so “which is best” is the wrong question. “Which matches your need” is the right one, and this comparison is built to answer that honestly.

The short version

	LaunchDarkly	Statsig	PostHog
Center of gravity	Deepest flag tooling	Experimentation	Product analytics
Flag billing	$10/connection + $8.33/1k MAU	Unlimited, always free	1M requests/mo free, then per request
Experimentation	Add-on, higher tiers	Strongest engine here	Reads from your analytics
Free tier	Developer $0, unlimited seats	2M events, unlimited flags	1M flag requests
Paid entry	Usage-based, ~$72k/yr median	$150/mo flat (Pro)	Usage-based
Self-host	No (closed SaaS)	No (proprietary)	MIT but unsupported
Big gotcha	MAU on highest-volume kind	Owned by OpenAI	Each product bills separately

LaunchDarkly: the depth pick

If you need the top of the feature set, this is still the one. LaunchDarkly has around 38 SDKs, the broadest coverage available, advanced targeting rules, and guarded releases that automatically roll back when a metric goes bad - genuinely best-in-class and something neither of the others matches. Its G2 score is 4.5 across 681 reviews, and seats are unlimited on every tier.

The gotcha is the bill. It bills $10 per service connection per month plus $8.33 per 1,000 client-side MAU, charged on your highest-volume context kind. Track 300,000 users but 500,000 devices and you pay for 500,000, the bigger number, even if you only target users. Vendr’s contract data puts the median around $72,000 a year, ranging from $19,500 to $165,700, and at 10M MAU add-ons alone can exceed $33,700 a month. Experimentation is an add-on here, not the core, so if testing is your priority the price stacks. It’s the depth leader and the cost leader at once.

Statsig: the experimentation pick with free flags

Statsig inverts LaunchDarkly’s model, and that’s the pitch. Flag and config checks are unlimited and free on every tier, including the free one. It monetizes analytics and experiment events instead, so you can evaluate flags a billion times a month at zero cost. On top of that, its experimentation engine - built by ex-Facebook engineers to mirror Facebook’s internal stack, with sequential testing and CUPED - is the strongest in this set. The free Developer tier is generous (2M events, unlimited flag checks, 50,000 session replays, no card), and Pro is a predictable flat $150/mo.

The gotcha is ownership. OpenAI acquired Statsig on 2 September 2025 for a reported ~$1.1 billion in an all-stock deal, and founder Vijaye Raji became OpenAI’s CTO of Applications. The product still ships independently and existing customers are still served, but adopting it today is a multi-year bet on a roadmap that now sits inside OpenAI. The second, smaller catch: the meter moves on analytics events, so heavy analytics usage is where the bill lives even though flags are free.

PostHog: the all-in-one pick

PostHog is a product-analytics suite - events, funnels, session replay, surveys - with flags and experiments as one product line. Its edge is integration: its experiments read directly from your product analytics, so the metrics you test against are the same events you already track. No piping data between tools. Flags are cheap here too - the first 1,000,000 requests a month are free, then fractions of a cent. On experimentation depth it lands second only to Statsig.

The gotcha is that each product bills separately. Analytics events, session replays, surveys and the data warehouse each have their own meter, so your flags line can stay cheap while the total climbs across the products you turn on. Model every product you plan to use. And its open-source MIT self-host is officially unsupported - no guarantees, no tagged releases - so treat it as run-at-your-own-risk, not an enterprise self-host path.

Which should you pick?

• You need the deepest flag tooling and guarded auto-rollback - LaunchDarkly. Nothing here matches its targeting depth or SDK breadth, and if you can forecast your context volume, it’s worth the cost.
• You want flag checks to cost nothing, ever - Statsig. It never bills flags, and if experimentation is a first-class need, its engine is the strongest here too. Just price in the OpenAI-ownership asterisk.
• You want flags, experiments and analytics in one platform - PostHog. The integrated data model is the whole point, and flags are nearly free on top of it.
• Experimentation is your center of gravity - Statsig for the strongest standalone stats engine, PostHog if you want it fused with your analytics.
• You only want feature flags, cost no object - LaunchDarkly for depth. If cost matters, Statsig, since flag checks are free.
• You need a supported self-host path - none of these three. All are cloud-first. Look at Flagsmith or Unleash instead.

The bottom line: the honest winner changes with your need, and that’s not a cop-out - it’s the actual shape of this market. Pick LaunchDarkly for depth if you can pay for it. Pick Statsig if you want free flags and serious experimentation, and you’re comfortable betting on a product inside OpenAI. Pick PostHog if you want everything in one place and analytics is genuinely part of the plan. Decide your center of gravity first, and the right tool falls out of it.

---

Pricing verified against each vendor’s own site on 26 July 2026. LaunchDarkly contract figures ($72,000 median, $19,500 to $165,700 range) are from Vendr’s third-party buyer data. The Statsig acquisition figure (~$1.1 billion, 2 September 2025) is from third-party reporting and vendor confirmation. All attributed as such.