Swetrix Review (2026)

Swetrix is the rare cookieless tool that actually competes with PostHog on feature surface. Where Plausible and Fathom give you pageviews and call it a day, Swetrix bundles full Core Web Vitals performance monitoring, JavaScript error tracking, A/B experiments, feature flags, conversion funnels, and a built-in CAPTCHA — all included on every paid tier from $19.

The privacy mechanics are the real thing. Sessions are derived from a daily-rotating salt hashed against IP + User-Agent in memory; the raw IP never touches disk. Compare that to Matomo's anonymize-IP plugin, which still writes a truncated IP to MySQL. Hosting is single-region Hetzner Germany, no US plane.

The codebase is AGPL-3.0 and the Community Edition is the same code as the cloud — not a stripped "open-core."

50 sites included on every tier — favorable for agencies and portfolio operators vs Plausible's per-site or Pirsch's metered-site model.

Three real holes will disqualify Swetrix for some buyers. First, no SOC 2 or ISO 27001 attestation, which is a hard blocker for enterprise procurement. Matomo Cloud holds ISO 27001; Piwik PRO has ISO 27001 + SOC 2 + HIPAA BAA. Plausible, Fathom, and Pirsch self-attest GDPR/CCPA/PECR but hold no third-party certs either — Swetrix is in good company at the SMB tier.

Second, the DPA names only Hetzner and Sentry, but the privacy policy lists Sentry, AWS, and OpenRouter — three US sub-processors — without referencing Standard Contractual Clauses anywhere. Schrems II compliance is left to the buyer's interpretation.

Third, Do Not Track is explicitly not honored — verbatim from the privacy policy. For hardline privacy buyers comparing against Fathom (which does honor DNT) this is a flag.

Solo-founder dependency risk. Companies House lists Andrii Romasiun as sole director; bus-factor of 1 for a SaaS handling production analytics. Pricing also bites at the low end: $19 for 100k events vs Plausible's $9 for 10k pv.

Best for indie SaaS founders and dev shops who want analytics + error tracking + performance monitoring + feature flags as one tool, hosted in the EU, without writing a check to PostHog enterprise. The 50-site cap on every tier makes it especially strong for agencies and portfolio operators — at $79 you get 1M events across 50 client sites, which Plausible would charge $190+ for.

Real value at the $49 Professional tier — 500k events, all features unlocked (errors, performance, funnels, feature flags, A/B). Below that, Pirsch or Plausible win on price-per-pageview.

Not for enterprises requiring SOC 2 or ISO 27001 certificates; HIPAA-regulated workloads (claimed but not certified); teams who need GA4-style multi-touch attribution; or hardline privacy buyers who want DNT-honoring (use Fathom) or CNIL-certified banner-free posture (use Matomo).

Setup is a single-snippet drop-in. Add the ~5 KB JavaScript loader to your , set data-website-id, and you're collecting. Custom events go through a small swetrix.track('event_name', {props}) call — same shape as Plausible's plausible() function.

WordPress users have a dedicated plugin in the integrations directory; it auto-injects the snippet and supports custom events via shortcodes. For sites that fight ad-blockers, Swetrix offers a managed first-party reverse proxy — same model as Plausible's proxy.

The Statistics API, Events API, and Admin API are all REST + JSON, fully documented at docs.swetrix.com. GSC data flows in via the SEO dashboard once you OAuth-connect your Search Console property.

Self-host: clone github.com/Swetrix/swetrix, docker compose up -d. Stack is Node.js + ClickHouse + MySQL. AGPL-3.0 — full Cloud feature parity.

There is no GA4 history importer. Like Plausible and Fathom, Swetrix is a fresh-tag tool — you cut over from your GA4 cutoff date forward. Historical comparison requires keeping GA4 read-only for 14 months on its own.

Migration steps: install the Swetrix snippet alongside GA4 for 2-4 weeks to validate volumes match within ~10–15% (the gap is real-bots-filtered + ad-blocker-free), then remove GA4. The cookie consent banner can come down the day GA4 leaves, since Swetrix collects no PII under GDPR Recital 26 anonymization.

Re-tag custom events. GA4 events don't map 1:1 — Swetrix uses an event-name + properties model closer to Plausible than to GA4's hit schema. Plan to redefine 5-15 critical events using swetrix.track() and rebuild conversions from scratch. UTM parameters are auto-captured.

For agencies migrating multiple sites, Swetrix's 50-sites-per-plan model means you can cover an entire portfolio under one $79 Business plan.