Is PostHog or Unleash cheaper?

PostHog starts at $0 (generous monthly free tiers; pay only past the allowance) (free plan available). Unleash starts at $75 per seat per month (Pay-As-You-Go cloud) (free plan available).

PostHog vs Unleash

An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.

The short answer

Editorial assessment

Unleash compared with PostHog

PostHog gives flags, experiments, analytics, and replay on one usage-based bill and costs nothing at small volume, which is hard to argue with for a startup. Unleash is a specialist: better evaluation architecture, better governance, better privacy posture, and a self-hosting story with enterprise support behind it. Choose PostHog for breadth and cost, Unleash when flags are production infrastructure that has to survive an audit.

Choose PostHog if

Engineering-led SaaS and product teams that want web analytics, product analytics, replay, flags, and experimentation consolidated in one usage-priced platform, and that are comfortable doing their own revenue-attribution modeling if they need it.

Choose Unleash if

Engineering organisations that treat feature flags as production infrastructure and need governance, approvals, audit trails, and a privacy model where user data never reaches the vendor, including regulated European teams and any team that wants a credible self-hosted path with an enterprise support contract behind it.

Side by side

13 attributes

Attribute	PostHog	Unleash
Category	Analytics	Product Analytics
Starting price	$0 (generous monthly free tiers; pay only past the allowance) (free plan available)	$75 per seat per month (Pay-As-You-Go cloud) (free plan available)
Pricing model	Usage-based pricing per product: every product has a monthly free allowance, then per-unit billing (per event, recording, flag request, survey response, or row) with steep volume discounts; optional platform packages add support and compliance features.	Per-seat pay-as-you-go cloud subscription with a large included API request allowance, plus a quoted Enterprise plan covering cloud, self-hosted, and hybrid deployment, and a free self-hosted open source build.
Free plan	1M analytics events, 5K session recordings, 1M feature-flag requests, 100K exceptions, 1,500 survey responses, and 1M data warehouse rows per month, on 1 project with 1-year retention.	No free hosted tier. The free path is the self-hosted open source build, which you run yourself with community support.
Free trial	Not applicable; the free tier is permanent, not a trial	14 days, no credit card required
Best for	Engineering-led SaaS and product teams that want web analytics, product analytics, replay, flags, and experimentation consolidated in one usage-priced platform, and that are comfortable doing their own revenue-attribution modeling if they need it.	Engineering organisations that treat feature flags as production infrastructure and need governance, approvals, audit trails, and a privacy model where user data never reaches the vendor, including regulated European teams and any team that wants a credible self-hosted path with an enterprise support contract behind it.
Setup time	Minutes to first data with the JS snippet and autocapture; days to weeks to define clean custom events, dashboards, and cohorts; warehouse sources and pipelines are a separate project.	An hour on the hosted plan: create a project and environments, install a backend SDK, wrap a code path, and ship. Self-hosting is a different order of work, involving a Postgres database, the API server, and usually Unleash Edge in front of it, so budget days rather than hours plus ongoing maintenance.
Learning curve	Low for the web analytics dashboard; moderate for funnels, cohorts, and replay; high for SQL insights, warehouse modeling, and experimentation statistics.	Moderate for developers. The concepts of projects, environments, activation strategies, constraints, segments, and variants stack up quickly, and the difference between backend and frontend SDK behaviour is the thing new users most often get wrong. Once understood, the model is more expressive than most competitors.
Platforms	Web app, JavaScript snippet and web SDK, Server SDKs (Python, Node, Go, PHP, Ruby, and others), Mobile SDKs (iOS, Android, React Native, Flutter), Self-hosted Hobby build (Docker, open source)	Java, Node, Python, Go, Ruby, PHP, .NET, Rust, JavaScript and React, Android, iOS, Flutter, OpenFeature providers, Unleash Edge
Compliance	SOC 2 Type II, GDPR, HIPAA (BAA on Boost, Scale, or Enterprise package)	SOC 2 Type II, GDPR
Founded	2020	2019
Headquarters	Remote-first; US-incorporated (San Francisco), team distributed globally	Oslo, Norway
Ownership	Venture-backed	Venture-backed, privately held (legal entity Bricks Software AS)

Strengths and limitations

PostHog

Strengths

Breadth with real integration: analytics, replay, flags, experiments, surveys, error tracking, and a warehouse genuinely share one event stream and identity graph rather than being bolted-on acquisitions.
The most generous free tier in the category, 1M events and 5K recordings monthly, permanently, which makes evaluation and early-stage use genuinely free.
Open-source codebase plus a choice of US or EU (Frankfurt) cloud gives privacy and procurement teams inspectability and residency options most rivals lack.
Usage pricing with automatic volume discounts and per-product spending caps scales from hobby project to hundreds of millions of events without a sales call.

Limitations

No packaged B2B revenue attribution: connecting spend and touchpoints to CRM pipeline and closed-won revenue is a data-warehouse project in PostHog, not a built-in report as in Dreamdata or HockeyStack.
Depth demands technical investment; non-technical marketers can read the web dashboard but will struggle to self-serve funnels, SQL insights, or warehouse joins.
Usage-based billing is unpredictable without configured limits, and replay-heavy or autocapture-noisy sites can generate surprising invoices.
The full event platform carries more GDPR surface than minimalist tools: consent, masking, and retention need deliberate configuration, where Plausible or Fathom are compliant nearly by default.

Unleash

Strengths

The privacy architecture is the strongest in the category: backend SDKs evaluate locally and no user data is shared with the Unleash server, which resolves most of a GDPR review before it starts.
Governance is included rather than upsold. SSO, RBAC, four-eyes approvals, two year audit logs, and US or EU residency are in the $75 base plan.
Local in-memory evaluation at nanosecond speed plus Unleash Edge caching means flags add no latency and a vendor outage degrades to last known state instead of an incident.
A genuine open source project with roughly 13,000 GitHub stars, 35 million or more downloads, and eleven years of history, which makes it credible as a long-term dependency.

Limitations

At $75 per seat per month the cloud plan is roughly double GrowthBook and many times Flagsmith's small-team price, and there is no free hosted tier at all.
No experiment statistics. Variants and impression data let you run a test, but significance, sequential testing, and variance reduction have to come from another tool.
Flag metrics are retained for only 90 days on both tiers, so long-run usage analysis needs exporting.
No visual editor and no non-developer path, so product and marketing cannot operate it without engineering.

Pricing compared

PostHog

Usage-based pricing per product: every product has a monthly free allowance, then per-unit billing (per event, recording, flag request, survey response, or row) with steep volume discounts; optional platform packages add support and compliance features.

Free (no card)$0
Pay-as-you-goUsage-based
Platform packages (Boost, Scale, Enterprise)Quoted / package pricing

At small and mid scale PostHog is close to unbeatable on price: the permanent free tiers cover a real startup's entire measurement stack, and the per-unit rates undercut buying analytics, replay, flags, and experimentation separately. The honest caveat is that usage pricing shifts the budgeting burden onto you: a replay-heavy or event-noisy implementation can quietly cost more than a flat-rate point tool, and the platform packages needed for enterprise compliance are quoted, not listed. Treat it as extremely cheap by default and only as cheap as your instrumentation discipline at scale.

Unleash

Per-seat pay-as-you-go cloud subscription with a large included API request allowance, plus a quoted Enterprise plan covering cloud, self-hosted, and hybrid deployment, and a free self-hosted open source build.

Pay-As-You-Go (Cloud)$75
Custom EnterpriseCustom
Open source self-hosted$0

Unleash is the expensive option in this set and is unapologetic about it. Modelling a bill is unusually easy because the meter is almost entirely seats: a product with 10,000 monthly users and one with 100,000 monthly users both cost $75 per seat, since backend SDKs poll for configuration rather than asking per user, and 53 million included requests is generous enough that most small businesses will never see an overage line. A three-person team pays $225 a month, a ten-person team pays $750. Set against Flagsmith, where SSO and approvals start at $250 a month, or against GrowthBook, where they are Enterprise-only, a small regulated team that genuinely needs governance may find Unleash competitive on total cost rather than expensive. Set against those same vendors for a team that does not need governance, it is roughly double the price for flag control alone, and the missing statistics engine means you are still buying measurement elsewhere. Value here is entirely a function of whether change control and the no-user-data architecture are requirements or nice to have.

Editorial verdict on each

PostHog

Category Leader

PostHog is the default recommendation in this category for any team with an engineer on it: no rival matches the combination of a free-forever tier that covers real workloads, usage pricing that scales without a sales call, and genuinely integrated replay, flags, and experimentation on top of web and product analytics. The two honest reservations are that marketing teams without technical support will use a fraction of it, and that B2B pipeline attribution, the question GTM leaders most want answered, remains a do-it-yourself exercise on PostHog's warehouse rather than a shipped feature. Buy it as the behavioral system of record; budget separately if you need turnkey revenue attribution.

Read the full PostHog profile

Unleash

Unleash is the feature flag platform for teams that treat releases as a governed process rather than a convenience. The evaluation architecture is the best in the category, with backend SDKs applying strategies locally so no user data reaches the vendor and no network call touches your request path, and the governance layer that competitors sell as enterprise, meaning SSO, role based access control, four-eyes approvals, two year audit logs, and EU residency, is simply in the base plan. That is worth the $75 seat price if you need it. Buy Unleash if you are European and privacy-constrained, if change control is a requirement, or if flags are production infrastructure for a fleet of services. Do not buy it as a cheap first flag tool, because Flagsmith does that job for a fraction of the money, and do not buy it expecting experiment results, because variants and impression data are where it stops and a real statistics engine is a different purchase.

Read the full Unleash profile

PostHog profile last reviewed 2026-08-22; Unleash last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.