Formbricks vs PostHog
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 assessmentFormbricks compared with PostHog
There is real overlap, since PostHog also runs in-app surveys alongside product analytics, session replay, and feature flags on a generous usage-based free tier. If you already run PostHog, its surveys probably cover your needs without a new vendor. Formbricks earns a place when surveys are the point rather than a side feature: deeper question types, quota management, AI feedback labeling, and an AGPLv3 self-hosting path focused entirely on experience management.
Choose Formbricks if
Product, growth, and research teams at startups that need surveys triggered inside their own application, targeted by user attributes, and teams with strict data-residency or data-ownership requirements who would rather self-host an AGPLv3 survey engine than send customer feedback to a US SaaS vendor.
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.
Side by side
13 attributes| Attribute | Formbricks | PostHog |
|---|---|---|
| Category | Forms | Analytics |
| Starting price | $0 self-hosted (AGPLv3); $74/mo for the cloud Pro tier (free plan available) | $0 (generous monthly free tiers; pay only past the allowance) (free plan available) |
| Pricing model | Dual model: an AGPLv3 open-source core that is free to self-host with unlimited responses (enterprise modules separately licensed), alongside a response-metered EU-hosted cloud with three published tiers. | 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 plan | Cloud Hobby tier: 250 responses per month, 1 workspace, link, website, and in-product surveys, all question types, conditional logic, hidden fields, partial responses, file uploads, and full API access. | 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. |
| Free trial | Free Hobby cloud tier plus a free Enterprise Edition trial license for self-hosted proofs of concept | Not applicable; the free tier is permanent, not a trial |
| Best for | Product, growth, and research teams at startups that need surveys triggered inside their own application, targeted by user attributes, and teams with strict data-residency or data-ownership requirements who would rather self-host an AGPLv3 survey engine than send customer feedback to a US SaaS vendor. | 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. |
| Setup time | A link survey is a same-hour job on the cloud. In-app surveys take an engineering sprint: install the SDK, decide which attributes and events to send, and instrument them. Self-hosting adds a Docker deployment, a Postgres database, and an upgrade routine. | 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. |
| Learning curve | Moderate to high, and the highest of these five products. The survey editor is straightforward; the targeting model (contacts, attributes, segments, event triggers) requires the team to think like a product-analytics user rather than a form builder. | Low for the web analytics dashboard; moderate for funnels, cohorts, and replay; high for SQL insights, warehouse modeling, and experimentation statistics. |
| Platforms | Cloud (EU, hosted in Frankfurt), Self-hosted via Docker, Web SDK and React library, iOS and Android SDKs (Pro), Link surveys and email embeds | 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) |
| Compliance | SOC 2 Type II, ISO 27001, GDPR compliant with EU (Frankfurt) hosting, CCPA alignment, DPA documentation provided | SOC 2 Type II, GDPR, HIPAA (BAA on Boost, Scale, or Enterprise package) |
| Founded | 2022 | 2020 |
| Headquarters | Kiel, Germany (Formbricks GmbH) | Remote-first; US-incorporated (San Francisco), team distributed globally |
| Ownership | Venture-backed (open-source specialist investor) | Venture-backed |
Strengths and limitations
Formbricks
Strengths
- The only product in this category that runs behavior-triggered surveys inside your own application, targeted by user attributes and tied back to identified contacts.
- Genuine open source: an AGPLv3 core that self-hosts with Docker for unlimited responses, with development in the open on GitHub and the option to fork.
- Strong compliance posture for a company this small: SOC 2 Type II, ISO 27001, GDPR with EU hosting in Frankfurt, CCPA alignment, and published DPA documentation.
- Full API access on every tier including the free one, plus native iOS and Android SDKs, which makes it the most developer-oriented option here.
Limitations
- Cloud pricing is the least competitive in the category: 250 free responses a month, then 74 dollars for 2,000 and 325 dollars for 5,000.
- The valuable capabilities require engineering: installing SDKs, sending user attributes and events, and either operating a self-hosted deployment or paying cloud rates.
- Open source has boundaries that matter in practice: SSO, team roles, audit logs, and white-labeling are commercially licensed even for self-hosters, and AGPLv3 carries copyleft obligations on distributed modifications.
- Weak as a general-purpose form builder: no payments, no bookings, no PDF generation, no e-signature, and a thinner template and theming story than Paperform or Youform.
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.
Pricing compared
Formbricks
Dual model: an AGPLv3 open-source core that is free to self-host with unlimited responses (enterprise modules separately licensed), alongside a response-metered EU-hosted cloud with three published tiers.
- Self-hosted (Community Edition)$0
- Hobby (cloud)$0
- Pro (cloud)$74
- Scale (cloud)$325
There are two Formbricks and they have opposite value profiles. Self-hosted, it is arguably the best deal in the whole category: an in-app survey engine with targeting, segmentation, and mobile SDKs for the cost of a container and a Postgres database, with no response meter and no data leaving your infrastructure. Hosted, it is the most expensive product here by a distance: 74 dollars for 2,000 responses is roughly what Fillout charges for unlimited, and Tally and Youform charge nothing at any volume. The honest read is that the cloud pricing is aimed at teams whose alternative is Qualtrics or Sprig rather than a form builder, and startups comparing on price should either self-host or accept that they are buying the in-app targeting, not the collection.
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.
Editorial verdict on each
Formbricks
InnovationFormbricks is two products with one name, and buyers should be clear which one they are evaluating. Self-hosted, it is the best value in this category and possibly the only sensible choice for a team that needs in-product survey targeting but cannot send customer feedback to a US vendor: unlimited responses, an auditable AGPLv3 codebase, and mobile SDKs, for the price of running a container. Hosted, it is the most expensive option here, with 250 free responses and a 74-dollar Pro tier that buys less collection than Fillout's free plan. Nobody should buy Formbricks cloud as a form builder. Product teams that want to ask the right user the right question at the right moment inside their own app should look hard at it, and should probably run it themselves.
Read the full Formbricks profilePostHog
Category LeaderPostHog 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 profileFormbricks profile last reviewed 2026-08-22; PostHog last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.