--- title: "SealMetrics vs Google Analytics 4 — Complete data, no spin" description: "Honest comparison. GA4 loses 40–60% of EU traffic to consent and ad blockers. SealMetrics captures 100%. Run both alongside for 30 days." canonical_url: "https://sealmetrics.com/vs-ga4/" lang: "en" date_modified: 2026-05-04 content_type: "comparison" owner: "web" llm_priority: "useful" last_verified: "2026-05-04" source: https://sealmetrics.com/vs-ga4/ publisher: SealMetrics --- vs Google Analytics 4 # GA4 shows you *40%* of your traffic. SealMetrics shows 100%. GA4 works fine for what Google needs. Not for the CMO defending a €2M budget. This is the honest comparison — and why most eCommerce teams end up running both in parallel. [Book a demo →](https://sealmetrics.com/demo/)[Start 14-day trial](https://my.sealmetrics.com/register) 14-day trial · Cancel before day 14, pay nothing · 4-minute setup Updated 4 May 2026 · By [Rafa Jiménez](https://sealmetrics.com/authors/rafa-jimenez/), Founder, SealMetrics TL;DR GA4 is Google’s free analytics product, hosted in the United States, that requires a cookie consent banner across the EU and uses statistical modelling for unconsented traffic. SealMetrics is an EU-hosted cookieless analytics platform that captures 100% of inbound traffic without a consent banner and attributes every conversion last-click on observed events. The substantive difference is data completeness: GA4 typically reports **13–40% of real EU traffic** after consent rejection (40–60%), ad blockers (~25%) and Safari’s Intelligent Tracking Prevention; SealMetrics captures the full **100%** on aggregate. Most teams run both for 30 days side-by-side, compare against their CRM, then keep GA4 as a Google Ads conversion conduit while making revenue and budget decisions on SealMetrics. Pricing starts at €499/month annually. - GA4: consent-gated, sampled, US-hosted, Google-owned — best for Google Ads conduit. - SealMetrics: consent-free, full-resolution, EU-hosted in Dublin — best for revenue decisions. - No migration required — drop the pixel alongside GA4 and compare your own numbers. ## The *single source of truth* eCommerce signs against **Dreamplace Hotels** recovered **+30% more traffic** vs GA4 and closed a **15–20% gap** in sales attribution against their CRM. **Palladium Hotel Group** recovered **35% of unattributed bookings** and improved Display CPS by **+165%**. ![Palladium Hotel Group](https://sealmetrics.com/logos/clients/palladium-dark.svg) ![Dreamplace Hotels](https://sealmetrics.com/logos/clients/dreamplace.svg) ![Acciona](https://sealmetrics.com/logos/clients/acciona.svg) ![Crocs](https://sealmetrics.com/logos/clients/crocs.svg) ![Desigual](https://sealmetrics.com/logos/clients/desigual-dark.svg) ![UNICEF](https://sealmetrics.com/logos/clients/unicef.svg) ![Casa Batlló](https://sealmetrics.com/logos/clients/casabatllo.png) ![Juguettos](https://sealmetrics.com/logos/clients/juguettos.png) ![3Cat](https://sealmetrics.com/logos/clients/3cat.png) ![Fundación Bankinter](https://sealmetrics.com/logos/clients/fundacion-bankinter.png) ![Dormideo](https://sealmetrics.com/logos/clients/dormideo.png) ![Incapto](https://sealmetrics.com/logos/clients/incapto.svg) Quick answer SealMetrics vs Google Analytics 4 (GA4): GA4 is Google’s free analytics platform — US-hosted, cookie-based, sampled at scale, and dependent on a cookie consent banner across the EU. SealMetrics is an EU-hosted cookieless analytics platform that captures 100% of inbound traffic without consent dependency and attributes each conversion last-click on observed events, from €499/month billed annually. For European eCommerce the gap is structural: GA4 loses 40–60% of EU traffic to consent rejection and reconstructs it with statistical modelling, while Safari’s ITP and ad blockers erode more. SealMetrics measures the same traffic with a lightweight first-party pixel — no cookies, no sampling, no Schrems II review — so the revenue in the report matches Shopify. Most teams run both side by side for 30 days, reconcile against their CRM, then move revenue decisions to SealMetrics while keeping GA4 as a Google Ads conduit. The gap ## What GA4 *doesn't see.* Four points where GA4's architecture loses data by design. Not bugs — this is the product working as intended for Google Ads' use case. 40–60% Consent rejection GA4 depends on cookies. Average EU visitor rejects, GA4 never sees them. ~25% Ad blockers Block google-analytics.com. GA4 never receives the ping. Sampling Volume thresholds Above certain volume, GA4 samples and models. Black Friday = estimates. US-hosted Schrems II Data crosses to US. Subject to ongoing EU regulatory challenge. What the dashboard says vs what happened ## What your dashboard shows *vs what actually happened.* Five patterns we see across European eCommerce accounts. Most customers find at least two of these gaps in their own data within the first 30 days running SealMetrics alongside GA4. ### Organic search traffic GA4 reports Sampled and cookie-filtered. Sessions where consent was rejected are missing from the organic channel entirely. SealMetrics captures 100% observed, server-side, consent-independent. **Consequence —** Organic channels are typically 2–4× bigger than GA4 reports. The SEO investment you're about to cut may be your best-performing channel. ### Meta campaign conversions GA4 reports Partial. Pixel-dependent. De-duplicated against modelled Consent Mode v2 estimations. SealMetrics captures Server-side conversions, independent of consent rejection or pixel-blocking. **Consequence —** True ROAS is often meaningfully higher than GA4 suggests. The campaign you were about to kill may have been working the whole time. ### Direct traffic bucket GA4 reports 40–60% of total sessions attributed to “direct” or “(none)”. The channel that grew fastest quarter-over-quarter — and you can't assign it. SealMetrics captures Real channel attribution preserved server-side. The “direct” bucket returns to its actual share. **Consequence —** Direct stops masking the campaigns that were secretly carrying the quarter. Attribution becomes defensible in a budget review. ### Real-time data during peak events (Black Friday) GA4 reports Delayed, sampled above threshold, modelled reconciliations that land hours later. SealMetrics captures Real-time event stream with zero sampling, regardless of traffic peak. **Consequence —** The 2 AM call on Black Friday gets made on real data, not an estimate that reconciles three hours after the decision window closed. ### Booking attribution (hotels & travel) GA4 reports Cookie-dependent, consent-gated. A share of real CRM bookings simply doesn't appear in marketing reports. SealMetrics captures Booking conversions counted server-side at landing-channel level — independent of consent state. **Consequence —** 20–25% of real CRM bookings stop being invisible. Agencies and internal teams align on the same booking number. The exact size of the gap depends on your market mix, device mix and consent acceptance rate. No client sees all five — but almost every one sees one or two. Comparison ## Feature by feature. *No spin.* The exact comparison a CTO or CMO needs before signing. Honest about GA4's strengths; direct about where it fails for an eCommerce team deciding with real money. ### Technical & data capture Capability Google Analytics 4 SealMetrics Data capture Consent required Yes · 40–60% reject No · 100% captured Ad blocker affected Yes · ~25% blocked No · first-party Cookies on visitor device Required None Sampling at scale Yes · above threshold Never · full resolution Tracker performance (measured) Script weight on the wire (gzip) ~146 KB · gtag.js 1.1 KB · ~132× lighter JavaScript parsed on the device ~409 KB 2.0 KB Pageview hit secured ~0.5–0.7 s best case · only after consent ~0.1–0.3 s · sendBeacon from the head Visits lost before the hit fires ~2–5% on mobile · grows on slow networks Minimal · hit secured in the first ~0.3 s Infrastructure Data residency US · Google infra EU · Dublin, Ireland Schrems II exposure Yes · ongoing challenge Clean Sub-processors outside EU Yes None [Read the full technical report (field measurements) →](https://docs.sealmetrics.com/guides/tracker-performance-report) ### Pricing & customer success Capability Google Analytics 4 SealMetrics Pricing Price Free (your data trains ads) From €499/mo annual Per-event overage Hidden limits trigger sampling No overage billing Data retention 14 months default 24 months included Customer success Onboarding Self-serve or agency-led Founder-led · 15-minute install Human support Community forums on the free tier Direct support on every plan ### Reporting Capability Google Analytics 4 SealMetrics Attribution Channel attribution Cookie-dependent Session-level, consent-free Direct/(none) bucket 40–60% of sessions Real share (typically <10%) Last-click Limited Default · on complete data Integrations Google Ads native Yes Via BigQuery export Meta / TikTok Ads Via external sync Native + BigQuery BigQuery export Yes (sampled above threshold) Yes · full resolution MCP / AI agents No native support Native MCP server Reporting parity Standard reports Reports + Explorations · 24–48 h processing lag Decision-ready defaults · real-time Custom analysis Explorations · sampled at scale Segments + property breakdowns · unsampled Data thresholding Rows hidden by privacy thresholds None · aggregate by design Audiences & remarketing Yes · its real strength Not a remarketing tool — no personal identifiers by design **Not "GA4 is broken".** GA4 works well for the Google Ads ecosystem. For defending a marketing budget on complete data, it falls short. Run both for 30 days and *you decide.* Methodology · 30 days ## Run both alongside. *Compare against your CRM.* We're not asking you to replace GA4. We're asking you to run both in parallel for 30 days, comparing each against your actual CRM. Then you decide which number to sign against. Week 1 ### Both installed GA4 stays where it is. SealMetrics installs in 15 minutes with one script tag. Both running on the same traffic. Week 2 ### Calibration We help you map channels, UTMs and microconversions. Both systems see the same traffic — and report very differently. Week 3 ### Comparison CRM in hand, you compare channels, conversions and revenue. You see exactly where GA4 falls short on your own data. Week 4 ### Decision Most teams sign SealMetrics as source of truth and keep GA4 for specific Google Ads integrations. No migration forced. FAQ ## The *objections*, answered. What CMOs and CTOs actually ask before replacing (or complementing) GA4. Still have questions? Our team — including the founder — is one message away. [Talk to us →](https://sealmetrics.com/demo/) Switched from a Google-Analytics stack ## How Palladium Hotel Group recovered *40% of unattributed traffic*. > “The data SealMetrics delivers is agnostic, unbiased and neutral. There’s no black box.” > > Toni Andújar · Digital & Direct Sales Director · Palladium Hotel Group Palladium ran SealMetrics alongside their existing GA-tier stack. The audit surfaced 40% of inbound traffic with no source/medium attribution, 35% of bookings unassigned to a channel in GA4, and a +165% Cost-per-Search improvement on Display once the SealMetrics measurement model drove DV360 decisions. They kept GA4 as the Google Ads conduit and made revenue decisions on SealMetrics. [Read the full Palladium case study →](https://sealmetrics.com/case-studies/palladium-hotel-group/) ## Run both for 30 days. *Then decide.* Install SealMetrics alongside GA4. Compare with your own CRM. If the gap isn't real, you owe us nothing. [Book a demo →](https://sealmetrics.com/demo/)[Start 14-day trial](https://my.sealmetrics.com/register) Built by a founder · supported by a founder · EU-hosted by design How we compared ## Methodology + sources Sources Public vendor documentation for Google Analytics 4 (pricing, feature lists, EU data residency statements). G2 and Capterra reviews referenced where they illuminate workflow differences. SealMetrics data points come from our own architecture and from named customer audits ([Palladium Hotel Group](https://sealmetrics.com/case-studies/palladium-hotel-group/), [Dreamplace Hotels](https://sealmetrics.com/case-studies/dreamplace-hotels/)). Pricing as of Pricing data is current as of 2026-05-04. Vendor pricing changes; we review quarterly and re-anchor on every major competitor release. SealMetrics pricing comes from [/pricing](https://sealmetrics.com/pricing/) (single source of truth). Disclosure SealMetrics is our product. We built this comparison to be useful even if you don’t choose us — every competitor mention is verifiable against its public documentation. If you find a fact that’s wrong or has changed, write to us and we’ll correct it within 48 hours. Update cadence Reviewed quarterly. Flagged for immediate update when a competitor ships a major change (pricing, EU hosting, attribution model). The page “updated” date below the H1 reflects the most recent edit.