Web Analytics · Comparison
Piwik PRO vs. Seline
Piwik PRO and Seline 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.
Piwik PRO
Enterprise-grade, privacy-focused analytics and customer data platform with GDPR compliance.
Seline
Simple, cookieless, privacy-first website and product analytics built in the EU.
Company facts
Headquarters
Wrocław, Poland
Warsaw, Poland Registered address: ul. Łowicka 60/16, 02-531 Warsaw, Poland.
Employees
190 Vendor about page states 'nearly 200 people'; third-party sources (LinkedIn, Pitchbook) show ~159–160 as of late 2025.
4 Tiny bootstrapped team of approximately 4 people. Co-founded by Kostya Nesterovich and Misha Slizenko.
Pricing
Starting Monthly Price (USD)
$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.
$14 Single 'Pro' plan at $14/month (monthly billing). Annual billing available with 2 months free.
Offers Free Tier
Free Core plan was discontinued March 2026; only a 30-day trial is available.
No perpetual free plan. Seline states: 'No, we don't have a free plan. We're a small bootstrapped team operating exclusively through subscriber fees.'
Free Trial Length (Days)
30 days
7 days 7-day free trial on the Pro plan, no credit card required.
Entry Plan Pageview Limit (Monthly)
2M Piwik PRO meters 'actions' (not pageviews); 2M actions/month on the entry Business plan.
100k Pro plan includes 100,000 events per month. Seline meters 'events' (pageviews + custom events combined), not pageviews alone.
Entry Plan Website Limit
20 sites Business plan includes up to 20 domains at the base tier; price adjusts based on domain count.
1 sites Pricing is per project (one website/domain per subscription); linking additional projects requires their own Pro subscription, with the option to share an event limit.
Analytics capabilities
Real-Time Dashboard
Yes
Live globe view and real-time visitor activity dashboard included.
Custom Event Tracking
Yes
Custom events tracked via seline.track() JS method or data-sln-event HTML attributes. Custom properties supported.
Goal / Conversion Tracking
Yes
Conversion via multi-step funnels (step drop-off / conversion rate) and revenue-attributed custom events.
Funnels
Yes
Multi-step funnel analysis built into the product for all plan users.
Ecommerce / Revenue Tracking
Yes
Revenue attribution by traffic source, referrer, and UTM. Native integrations with Stripe, Shopify, and Polar. MRR tracking included.
Heatmaps
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
Cookieless tracking is a fully supported optional mode; can be enabled per site via Administration settings.
Cookie-free by design. Uses daily-rotated non-reversible hashing of IP+browser+device — no cookies or persistent browser storage.
Consent Banner Required
Default configuration uses cookies and requires consent. With cookieless/anonymous mode enabled, no consent banner is needed — but that requires explicit configuration.
No cookie/consent banner needed. Seline explicitly states GDPR compliance without requiring visitor consent banners.
GDPR Compliant
Yes
Vendor explicitly claims GDPR compliance. No personal data retained; EU-hosted infrastructure.
EU Data Residency
EU data residency is available; Business plan is hosted on EU servers in Sweden (Elastx). Enterprise offers 60+ Azure regions including EU.
All infrastructure hosted in Germany (EU) via Hetzner — app servers, ClickHouse, and Postgres databases.
Data ownership & deployment
Open Source
No
The main SaaS product is proprietary. Only the JavaScript tracker client (seline-js) is MIT-licensed open source on GitHub.
License
proprietary
proprietary Main analytics platform is proprietary SaaS. The JS tracker client is separately MIT-licensed.
Self-Hostable
Traditional on-premise/self-hosted deployment is no longer offered. 'Private cloud' (installation in customer's own Azure subscription) is available on Enterprise plans.
Cloud-only SaaS. No self-hosting or on-premises option is documented or advertised.
Data Retention (Months)
25 mo
—
Unlimited Data Retention
No
Pro plan retains data forever ('unlimited' retention). Free trial and any hypothetical lower tiers cap at 1 year.
Google Analytics Import
Historical GA data cannot be imported. A settings/configuration migration tool (GA3 + GTM) existed but was discontinued April 2025; no data import path exists.
No official Google Analytics (UA/GA4) historical-data import; tracking starts from install.
Raw Data Export
Raw session and event data available via Reporting API at no extra cost; daily CSV raw data export is a paid add-on.
Public API includes a Raw Events endpoint for exporting individual event records with full filtering, pagination, and ordering. CSV export also available via AI assistant.
Platform & integrations
Has API
Yes
Public Stats API available at seline.com/api — covers visit metrics, custom events, funnels, visitor profiles, revenue data, and raw events.
Tracking Script Size (KB)
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.
4.2 KB Measured compressed transfer size.
Official WordPress Plugin
Yes
Official WordPress plugin published at wordpress.org/plugins/seline-analytics by the Seline founder (nstkostya = Kostya Nesterovich).
Email Reports
Yes
—
Public Dashboard Sharing
Publicly shareable links available for dashboards and standard reports (not custom reports). Links are valid for 90 days and marked as an experimental feature.
Dashboards can be shared via a public link (e.g. app.seline.com/share/<site>) viewable without an account.
The verdict
Piwik PRO Best for high-volume, multi-site analytics with heatmaps
Piwik PRO scales where Seline doesn't: 2M actions/month and 20 sites at the entry tier versus Seline's 100k events and one site. It adds heatmaps, which Seline lacks. Trade-offs: $40.38/mo vs $14, retention capped at 25 months versus Seline's unlimited, default config needs a consent banner, and the script is 26.6 KB versus 4.2 KB.
Full profile Seline Best for cheap, lightweight cookieless single-site tracking
Seline costs $14/mo versus $40.38, ships a 4.2 KB script versus 26.6 KB, is cookieless by default with no consent banner required (Piwik PRO needs one unless reconfigured), and retains data indefinitely versus Piwik PRO's 25-month cap. It also bundles Stripe/Shopify/Polar revenue tracking. The catch: 100k events/month and one site per subscription, versus 2M and 20 sites.
Full profileSources · 36 verified references
piwik.pro seline.com starterstory.com capterra.com help.piwik.pro github.com + 5 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.