Compare · PostHog is a product analytics and developer platform
SiteOS vs PostHog.
Product there, website here.
PostHog collects product analytics, session replay, error tracking, feature flags and experiments so product teams and their agents can understand users and ship fixes. SiteOS works on the website side, next to PostHog: SEO and AI visibility, analytics, a consent banner, forms, site search, browser checks on key journeys, errors with logs, traces and session replay, and checks that tracking fires, in one Project. This page compares SiteOS and PostHog on analytics, experiments, SEO and AI visibility, consent, forms, site search, checks and debugging, including where PostHog goes further.
At a glance
Where SiteOS goes further8
- Technical SEO auditsSite crawls, Lighthouse checks and Search Console reports
- Keyword, rank and backlink researchKeywords, SERPs, rankings, domains and backlinks
- AI answer visibilityChatGPT, Claude, Gemini and Perplexity, against up to five competitors
- Cookie consent bannerRegional rules, Google Consent Mode and scheduled scans
- Forms with an inboxShared inbox, contacts, spam controls and Mailchimp
- Site searchCrawled indices, relevance controls and search analytics
- Browser checks on key journeysPage checks without code, and Playwright journeys on a schedule and in pull requests
- Tracking checks for GA4, GTM and consentFailed requests, duplicates, missing events and tag changes, plus personal data, consent and pull request checks
Where PostHog goes further3
- A/B testingPostHog Experiments run A/B tests on feature flags and share their billing and free allowance.
- Feature flagsPostHog includes the first 1,000,000 feature flag requests a month free.
- Data warehouse with SQLPostHog's data warehouse queries business data with your events in SQL; the first 1,000,000 rows a month are free.
Both cover6
- Works with websites on any host
- Web analytics
- Error tracking
- Several websites in one workspace
- MCP for coding agents
- Free plan
Side by side
SiteOS vs PostHog
| Capability | SiteOS | PostHog |
|---|---|---|
| Works with websites on any hostAny framework, CMS or host, with nothing to migrate | Yes | Yes |
| Technical SEO auditsSite crawls, Lighthouse checks and Search Console reports | Yes | Partly |
| Keyword, rank and backlink researchKeywords, SERPs, rankings, domains and backlinks | Yes | No |
| AI answer visibilityChatGPT, Claude, Gemini and Perplexity, against up to five competitors | Yes | No |
| Web analyticsCookieless, with goals, funnels, several domains and GA4 | Yes | Yes |
| A/B testingNot offered | No | Yes |
| Feature flagsNot offered | No | Yes |
| Data warehouse with SQLNot offered: SiteOS reports are aggregates, without SQL access to raw events | No | Yes |
| Cookie consent bannerRegional rules, Google Consent Mode and scheduled scans | Yes | Partly |
| Forms with an inboxShared inbox, contacts, spam controls and Mailchimp | Yes | Partly |
| Site searchCrawled indices, relevance controls and search analytics | Yes | No |
| Browser checks on key journeysPage checks without code, and Playwright journeys on a schedule and in pull requests | Yes | No |
| Error trackingBrowser and server errors, grouped, with source maps | Yes | Yes |
| Tracking checks for GA4, GTM and consentFailed requests, duplicates, missing events and tag changes, plus personal data, consent and pull request checks | Yes | Partly |
| Several websites in one workspaceA Project per website, with separate environments | Yes | Yes |
| MCP for coding agentsYour agent reads the same evidence and works through fixes | Yes | Yes |
| Free planMonthly credits for research and checks; accounts by invitation during early access | Yes | Yes |
| Price of the compared plan | Free | Free + usage |
YesPartly, with the condition in the notesNot offered
SiteOS is free, with monthly credits for research and checks. PostHog includes monthly free allowances, such as 1 million analytics events, then bills each product by usage; Boost costs $250 a month and Scale $750.
Technical SEO audits: PostHog can import Lighthouse scores, including SEO, through its data warehouse; a site crawl is not described.
AI answer visibility: PostHog reports visits from AI assistants, not mentions in their answers.
A/B testing: PostHog Experiments run A/B tests on feature flags and share their billing and free allowance.
Feature flags: PostHog includes the first 1,000,000 feature flag requests a month free.
Data warehouse with SQL: PostHog's data warehouse queries business data with your events in SQL; the first 1,000,000 rows a month are free.
Cookie consent banner: PostHog provides consent APIs and cookieless tracking; you build the banner or use a CMP.
Forms with an inbox: PostHog Surveys collect responses as events, not website form submissions.
Browser checks on key journeys: PostHog's handbook states that it does not offer synthetic monitoring.
Error tracking: SiteOS Pulse Errors captures browser and server errors with source maps.
Tracking checks for GA4, GTM and consent: Health checks flag missing PostHog events and outdated SDKs, not GTM or other tags.
Several websites in one workspace: PostHog's free plan includes one project; pay-as-you-go includes six.
Sources · reviewed 12 Oct 2026
- PostHog pricing
- Platform packages
- Web analytics
- Privacy and consent
- Creating surveys
- Health checks
- Observability use cases
- PostHog MCP
- Feature flags · reviewed 13 Oct 2026
- Experiments · reviewed 13 Oct 2026
- Data warehouse · reviewed 13 Oct 2026
Together
Use them
together.
Keep PostHog where it goes further inside your app: product analytics, feature flags, experiments and session replay across your whole product. Use SiteOS for the website around it: search and AI visibility, consent, forms, site search, browser checks on key journeys, tracking checks and masked replays of sampled, consented visits. Your coding agent can work with both.
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