Web Analytics · Comparison
Fathom Analytics vs. Piwik PRO
Fathom Analytics and Piwik PRO compared across Company facts, Pricing, Analytics capabilities, Privacy & compliance, Data ownership & deployment and Platform & integrations — every fact sourced and re-verified from each vendor's public material.
Fathom Analytics
Privacy-first, cookieless web analytics with a simple dashboard and forever data retention.
Piwik PRO
Enterprise-grade, privacy-focused analytics and customer data platform with GDPR compliance.
Company facts
Headquarters
Victoria, Canada Fully remote-first company; Victoria, BC is the legal incorporation location.
Wrocław, Poland
Employees
5 LinkedIn shows 2–10 employees; 3 listed profiles. Midpoint of visible data ~5.
190 Vendor about page states 'nearly 200 people'; third-party sources (LinkedIn, Pitchbook) show ~159–160 as of late 2025.
Pricing
Starting Monthly Price (USD)
$15 Entry plan: $15/month for up to 100k pageviews.
$40.38 Entry Business plan starts at €35/month; converted at 1.1537 EUR/USD (rate on 2026-06-10). No USD list price published.
Offers Free Tier
7-day free trial available; no perpetual free plan.
Free Core plan was discontinued March 2026; only a 30-day trial is available.
Free Trial Length (Days)
7 days 7-day free trial on all paid plans.
30 days
Entry Plan Pageview Limit (Monthly)
100k Entry plan ($15/mo) includes up to 100k pageviews/month.
2M Piwik PRO meters 'actions' (not pageviews); 2M actions/month on the entry Business plan.
Entry Plan Website Limit
50 sites Up to 50 sites included on all plans; additional sites purchasable.
20 sites Business plan includes up to 20 domains at the base tier; price adjusts based on domain count.
Analytics capabilities
Real-Time Dashboard
Dashboard updates in real time; also provides a current-visitors API endpoint.
Yes
Custom Event Tracking
Custom events tracked via fathom.trackEvent() JS call or data attributes.
Yes
Goal / Conversion Tracking
Goals are built on custom events with conversion-rate reporting.
Yes
Funnels
Multi-step funnel analysis is not a feature; no documentation or marketing page references it.
Yes
Ecommerce / Revenue Tracking
Revenue values (in cents) can be attached to custom events; Shopify integration supported.
Yes
Heatmaps
Heatmaps are not part of the product.
Heatmaps (click, scroll maps) are part of the Piwik PRO Analytics Suite via built-in Tag Manager; visualized through the official Site Inspector Chrome extension.
Privacy & compliance
Cookieless Tracking
Zero cookies used by design; visitor identification via daily-salted SHA256 hashing.
Cookieless tracking is a fully supported optional mode; can be enabled per site via Administration settings.
Consent Banner Required
Vendor explicitly states no cookie consent banner is needed when using Fathom.
Default configuration uses cookies and requires consent. With cookieless/anonymous mode enabled, no consent banner is needed — but that requires explicit configuration.
GDPR Compliant
Vendor explicitly claims GDPR compliance; conducted formal GDPR review with EU consultants.
Yes
EU Data Residency
EU Isolation strips visitor IPs inside the EU, but the anonymized analytics data is stored on Fathom's main US servers.
EU data residency is available; Business plan is hosted on EU servers in Sweden (Elastx). Enterprise offers 60+ Azure regions including EU.
Data ownership & deployment
Open Source
Fathom is a closed-source, proprietary cloud SaaS product.
No
License
proprietary Current flagship product is closed-source; an archived MIT-licensed v1 exists but is not the offered product.
proprietary
Self-Hostable
Cloud-only SaaS; no self-hosting option documented or advertised.
Traditional on-premise/self-hosted deployment is no longer offered. 'Private cloud' (installation in customer's own Azure subscription) is available on Enterprise plans.
Data Retention (Months)
—
25 mo
Unlimited Data Retention
Vendor advertises 'forever' data retention on all plans.
No
Google Analytics Import
GA4 data import supported; Universal Analytics not supported (Google deleted UA data July 2024).
Historical GA data cannot be imported. A settings/configuration migration tool (GA3 + GTM) existed but was discontinued April 2025; no data import path exists.
Raw Data Export
Export is aggregated CSVs (dashboard reports); no raw visit/event-level data export available.
Raw session and event data available via Reporting API at no extra cost; daily CSV raw data export is a paid add-on.
Platform & integrations
Has API
Public Stats API for aggregated reporting plus account/site/event management endpoints.
Yes
Tracking Script Size (KB)
2 KB Measured compressed transfer size.
26.6 KB Compressed (over-the-wire) size of ppms.js (standalone analytics library). Full container including Tag Manager + Consent Manager is ~60.6 KB compressed.
Official WordPress Plugin
Official vendor-published WordPress plugin available at wordpress.org/plugins/fathom-analytics/.
Yes
Email Reports
Weekly or monthly scheduled email reports available.
Yes
Public Dashboard Sharing
Dashboards can be shared publicly or via password-protected link.
Publicly shareable links available for dashboards and standard reports (not custom reports). Links are valid for 90 days and marked as an experimental feature.
The verdict
Fathom Analytics Best for simple, low-cost privacy analytics
Fathom undercuts Piwik PRO on price ($15 vs $40.38/mo) and ships a 2 KB script against 26.6 KB. It is cookieless with no consent banner needed by default, keeps data forever rather than 25 months, and imports GA4 history, which Piwik PRO cannot. The tradeoff: a 100k pageview cap vs 2M actions.
Full profile Piwik PRO Best for EU residency and deeper analysis
Piwik PRO hosts Business-plan data on EU servers (Fathom stores it in the US) and adds funnels, heatmaps, and raw event export via API, none of which Fathom offers. Its entry tier meters 2M actions vs Fathom's 100k pageviews. Costs more ($40.38 vs $15/mo) and runs a heavier 26.6 KB script.
Full profileSources · 36 verified references
usefathom.com piwik.pro linkedin.com help.piwik.pro github.com developers.piwik.pro + 3 more
Affiliate disclosure. DecisionWire may earn a commission when you sign up through links on this page. Commissions never influence our data, scores, or rankings.