Seline

Active

Seline is a hosted web analytics service run from Warsaw with data hosted in Germany, and its plans are sized by events. It sets no cookies by default and counts visitors with a daily salted hash; optional cookie modes are available but switched off.

Web analytics
Cloud
Based in Poland
Founded 2024
Checked 17 Sep 2026

Visit website ↗Similar tools

Tracking script

1.89 KB compressed

4.18 KB uncompressed · measured 17 Sep 2026

Lighter than 31 of the 39 other measured scripts. Each line is one tool; hover to see which.

Price

From$9/mo

At 100k events$24/mo

Billed by events · checked 17 Sep 2026

Cheapest monthly price for each published traffic level, in events. Hover a point for the plan.

Privacy and data

Cookies: None
Data location: EU
Self-hosting: No
Source code: Closed

Plans

Free plan: No
Billing unit: Events
Sites on entry plan: Unlimited
Data retention: Unlimited

Strengths

Works without cookies by default: unique visitors are counted with a hash of the domain, IP address and user agent plus a salt that is unique to each domain and replaced every 24 hours.
A managed proxy serves the script and its requests from your own subdomain after you add one CNAME record, and a guide covers running your own proxy on Cloudflare Workers.
Outbound link tracking is a single attribute on the script tag, and a data-sln-event attribute turns clicks and form submissions into custom events.
Stripe revenue is pulled with a read-only API key and matched to visitors by email or by a visitor ID passed in Checkout metadata.
A share link opens a live dashboard without an account, and the vendor says it can be embedded in a Notion or Coda client portal.

Watch-outs

Without the optional cookie mode, a visitor who comes back the next day is counted as new, and longer journeys need cookie mode or identified users.
Custom events and every public API request count toward the monthly event limit, and the API has no SDKs and allows 100 requests a minute per project.
A data-sln-event attribute on a form sends all non-empty fields except passwords as event properties, so a contact form can pass names and email addresses into your analytics.
The WordPress plugin has stayed at version 1.0.0 since September 2025, and the documentation says the script is updated more often than the plugin.
Visit duration is calculated only for visits with more than two events, so single-page visits are left out of that figure.

Who it suits

Seline is a hosted service built by a small, self-funded team in Warsaw, and its application servers and databases run on Hetzner in Germany. There is one plan, Pro, with every feature included, and the price follows the monthly number of events, which covers pageviews and custom events.

Besides traffic reports, it shows the journey of each visitor, funnels built from pages and events, and profiles for signed-in users, and it pulls revenue from Stripe or Polar. That puts simple website analytics and light product analytics in one place.

Billing is per website, but sites can be linked to one subscription and share its limit. Agencies can also bill each client separately and invite each client’s team to its own project only.

Setup

Create a project, copy its token and put the script tag, with the token in a data-token attribute, in the head of every page. Page views are recorded automatically, and further attributes turn on outbound link tracking, skip or mask paths and enable the optional cookie modes.

For single-page apps, the @seline-analytics/web package follows route changes, and @seline-analytics/node sends events and profiles from a server. The documentation also covers Next.js, Framer, Webflow, Shopify and Google Tag Manager. On WordPress, the Seline Analytics plugin takes the token under Settings > Seline Analytics. Stripe and Polar are connected under Settings > Integrations with read-only keys.

Single snippet
WordPress plugin
First-party proxy
Public API
Data export (partly)
Search Console
Public dashboard

Features

As documented on the vendor’s own pages. “Partly” means the feature has limits or is only on some plans.

Tracking & Reporting

Pageviews & visitors: yes
Live visitor count: yes
Top pages report: yes
Top referrers: yes
UTM campaign tracking: yes
Country & city breakdown: yes
Device, browser, OS: yes
Bounce / engagement: yes
Time on site: yes
Custom events: yes
Goals / conversions: yes
Funnels: yes
Outbound link tracking: yes
File download tracking: yes
404 / error tracking: no

Pricing & Plans

Unlimited sites on entry plan: yes

Privacy & Compliance

Cookieless by default: yes
No personal data collected (vendor’s position): yes
No consent banner needed (vendor’s position): yes
Data hosted in EU: yes
Data hosted in US: no
Self-hostable: no
Open source: no
Data retentionUnlimited
Bot & spam filtering: yes

Setup & Integrations

Single-snippet install: yes
WordPress plugin: yes
Proxy / first-party domain: yes
Public API: yes
Data export (CSV/JSON)Partly
Google Search Console connector: yes
Email digests: no
Slack / webhook alerts: no
Public shareable dashboard: yes

Platforms & frameworks

What the vendor documents. A platform that is not listed has no guide, plugin or package from the vendor.

Shopify: yes
WooCommercePartly
Webflow: yes
ReactPartly
Next.js: yes
Vue / NuxtPartly
Google Tag Manager: yes
Server-side tracking: yes

Questions and answers

Does Seline use cookies?

No, not by default. The script counts visitors with a daily salted hash, and two optional modes set a first-party cookie: one for all visitors and one only for users you identify. The vendor says no consent banner is needed in the default setup; whether that holds for your site depends on the rules that apply to you.

What happens if I exceed the Seline event limit?

Nothing at first: Seline only notifies you. The pricing page says it asks for an upgrade when you exceed the limit two months in a row or go five times over it. Pageviews, custom events and public API requests all count toward the limit.

Is there a free Seline plan?

No. Seline has a single paid plan, Pro, and a 7-day free trial that needs no credit card. Yearly billing gives two months free. A separate paid setup service is offered to new customers, and a Pro plan is still required afterwards.

Where does Seline store data?

In Germany. The privacy policy says the application servers and the ClickHouse and Postgres databases run on Hetzner in the EU, and the company is based in Warsaw. Visitor country comes from a Cloudflare request header, and IP addresses are never written to the databases, according to the vendor.

Sources and checks

Status: Active, checked 17 Sep 2026
Prices: Checked 17 Sep 2026 on the vendor’s pricing page ↗
Tracking script: Measured 17 Sep 2026: downloaded and compressed the same way for every tool
Features: From the vendor’s pages, checked 18 Sep 2026
This page: Text updated 17 Sep 2026

How each value is collected: methodology. Why tools get no overall score: our reasoning.