Seline is a cookieless analytics platform that ties your traffic sources to actual revenue, page by page. It folds visitor paths, funnels, ad-blocker bypass, and Stripe-driven revenue attribution into one real-time dashboard. That combination is rare at a $59 one-time price.

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TL;DR Verdict

• Who it's for: Bloggers, SaaS founders, and small marketing teams that want answers without a data engineer.
• Headline price: $59 one-time for lifetime access on the AppSumo deal, down from $170.
• Biggest pro: Stripe-powered revenue attribution that shows which channel, UTM, or referrer actually made you money.
• Biggest con: No native mobile app, and data retention is capped at 3 years on the entry tier.
• Free trial: There is no free trial. The AppSumo deal includes a 60-day money-back guarantee instead.

Bottom line: Seline is worth a serious look if you want privacy-first analytics with revenue context and you hate subscriptions.

What Is Seline?

Seline is a privacy-first web analytics tool built for daily use rather than monthly dashboard check-ins. Founder Kostya Nesterovich launched it in July 2024 as a lighter alternative to Google Analytics, Fathom, and Plausible. According to the vendor's launch notes, Seline runs on roughly 1,000 websites and processes tens of millions of events every day.

The jobs it solves are concrete. You want to know which blog post drove signups last Tuesday. You want to see where visitors bail out of your checkout.

You want a single number that tells you whether your $500 ad spend returned $50 or $5,000. Seline answers all three without cookie banners, without a Tag Manager maze, and without exporting CSVs into a spreadsheet.

Most analytics tools pick one lane. They do traffic reporting well, or product analytics well, or revenue attribution well. Seline tries to cover all three in a single 2kb script.

That compression is the entire pitch, and per the official site at seline.com it is what the founder has been building toward for two years.

Key Features That Matter

Cookieless Tracking With Ad-Blocker Bypass

Seline does not write cookies, which means most visitors never see a consent banner. The script uses a first-party proxy pattern, so common ad blockers are far less likely to strip it. For site owners inside the EU, that removes a meaningful chunk of GDPR friction under the European Commission's data protection rules.

For everyone else, it just means fewer lost sessions in your reports.

Real-Time Dashboard With Sources, UTMs, and Pages

Open the dashboard and you see live visits, pageviews, bounce rate, top pages, referrers, countries, and devices in one view. There is no sampling and no 24-hour delay. You can filter by UTM parameter, referrer, or any custom attribute you send.

That matters when you are running three campaigns at once and need to know which one is pulling weight right now. If you also care about the metadata that powers social previews, our notes on link preview tags explain how that surface works.

Visitor Profiles and Session Paths

Seline lets you identify users, then attach custom properties like plan tier, signup date, or Stripe metadata. From there you can trace the exact sequence of pages and events a person touched before converting. This is the feature that separates Seline from pure traffic counters.

You can tag engaged users, filter out churn risks, and quietly watch how your best customers actually behave.

Funnel Builder for Drop-Off Analysis

You define steps (landing, pricing, signup, checkout, whatever), and Seline shows where people fall out. Each step can be filtered by referrer, campaign, country, or a custom property. That is how you find out that paid traffic converts fine until step three, while organic traffic sails through.

Fixing step three is the whole game. A funnel view without that segmentation tells you almost nothing actionable.

Revenue Attribution Through Stripe

Connect Stripe and Seline pulls in actual revenue, not estimated revenue. Every captured session gets tied back to a channel, UTM, or referrer. You end up with a clean answer to the question most analytics tools punt on: which marketing action paid for itself.

For SaaS teams, this alone justifies switching from a free tool. Smaller shops that already use a customer records platform can push the same data into their sales pipeline.

Public Dashboards, API, and AI Queries

You can share a read-only live dashboard with a client or teammate via a secure public link. The REST API lets you push events, pull reports, or wire Seline into your own tooling. Seline AI answers plain-English questions about your data, which helps when you do not want to build a report from scratch.

If you share dashboards with clients, this saves a lot of screenshotting.

Pricing Tiers (starts $59)

The AppSumo slider also includes 125,000, 550,000, and 1,000,000 pageview tiers if you outgrow the base plan.

Every tier is a one-time payment. There is no monthly fee, no per-seat charge, and no annual renewal. You get unlimited websites, profiles and session paths, revenue analytics, ad-blocker bypass, advanced bot detection, the API, live view, Seline AI, cookieless tracking, shareable dashboards, and 3 years of data retention.

The pageview slider goes up to 1,000,000 per month if you need more headroom. If you are used to comparing SaaS deals on deal-tracking communities, the structure here is familiar: pay once, keep it, and lean on the 60-day refund window as your safety net.

Pros and Cons

Pros

• Real revenue attribution via Stripe, not just traffic correlation
• Cookieless script removes consent banners for most visitors
• 2kb payload keeps page-load impact minimal
• One-time $59 entry price beats every monthly analytics plan
• Funnels can be filtered by referrer, UTM, or custom property
• Public dashboard links make client reporting painless
• Ad-blocker bypass recovers sessions most tools miss

Cons

• 3-year data retention cap on the entry tier
• No native iOS or Android app
• AI queries are useful but less mature than dedicated BI tools
• Smaller integration library than Google Analytics 4
• No free tier outside the AppSumo refund window
• Setup expects you to know what a UTM parameter is

Who Should Use Seline?

Solo Bloggers and Creators

If you publish four or more posts a week and want to know which one actually brought subscribers, Seline handles that in one screen. The one-time price sits below a single month of many premium analytics subscriptions. Pair it with a social scheduling workflow and you can see which channels feed the blog and which just burn time.

SaaS Founders and Small Product Teams

If you run Stripe and want to see which campaign produced the last 20 paying customers, Seline ties that loop for you. You do not need a data warehouse. You do not need to stitch three tools together either.

The funnel view plus revenue attribution is the workflow most seed-stage teams actually need.

Marketing Agencies With 5 to 15 Clients

Unlimited websites and shareable public dashboards make agency work straightforward. You can hand a client a live report link and skip the monthly PDF ritual. Cookieless tracking also removes the consent question from scope, which shortens onboarding.

If you also handle site hygiene, tools like a spam blocker for forms fit the same one-time-deal philosophy.

Who Should Skip Seline

Skip Seline if you need raw event-level data exported at scale, if you rely on BigQuery or Snowflake pipelines, or if you want a mobile app to check stats from your phone. Skip it too if you need a free forever tier to test for months before paying. Teams already deep inside Google Analytics 4 with Looker Studio dashboards will find Seline a step down in flexibility, even if it is a step up in clarity.

Alternatives to Consider

Plausible Analytics is the closest privacy-first competitor. It is lighter on revenue attribution, but its monthly pricing suits people who prefer subscriptions over a one-time deal. It runs on similar cookieless principles.

Fathom Analytics focuses on a clean single-page dashboard and strong GDPR positioning. Its funnel and revenue features are thinner than Seline's, so if attribution matters, Seline wins. Fathom's UI is arguably the simplest of the three.

Google Analytics 4 is free, has the biggest integration library, and connects to the entire Google ad stack. The trade-offs are complexity, sampling, consent overhead, and an interface most small teams never fully learn.

If privacy at the network level is also on your list, our breakdown of secure browsing tools covers the adjacent layer.

Final Verdict

Seline earns its place in the cookieless analytics category by solving the one question most tools dodge: which channel made you money. The $59 lifetime entry point undercuts every major subscription competitor, and the 60-day refund window removes most of the risk. The trade-offs are real (3-year retention, no mobile app, a smaller integration library), but they will not matter to bloggers, small SaaS teams, or agencies running client sites.

For a one-time fee under $60, you are buying real-time traffic, visitor paths, funnels, and Stripe revenue in one dashboard. That is a fair deal.

Ready to lock in lifetime access before the AppSumo launch window closes? Get the Lifetime Deal →

Frequently Asked Questions

Does Seline have a free plan?

No. Seline runs on paid plans only, and the AppSumo lifetime deal is the cheapest entry point at $59 one-time. There is no permanent free tier.

The 60-day money-back guarantee is the closest thing to a risk-free trial.

How does Seline compare to Google Analytics 4?

GA4 is free and connects directly to Google Ads, Search Console, and BigQuery. Seline is cookieless, faster to read, and ties revenue to channels without configuration gymnastics. GA4 wins on ecosystem depth, Seline wins on daily usability and privacy compliance.

Can I cancel anytime?

There is no subscription to cancel. The AppSumo deal is a one-time payment for lifetime access. If you change your mind within 60 days of purchase, AppSumo's refund policy lets you request a full refund.

Is Seline worth the price?

If you pay for analytics monthly today, yes. A $59 one-time fee pays for itself within a few months compared to typical $10 to $20 per month tools. If you rely on Stripe revenue attribution or client-facing dashboards, the value is even clearer.

Does Seline work with WordPress and Shopify?

Yes. According to the official documentation, Seline ships integrations for WordPress, Shopify, Webflow, Google Tag Manager, and Stripe. You can also install it with a single snippet on any custom site.

The script weighs 2kb, so page speed impact stays minimal. If speed is a concern on your end, it helps to know your baseline connection performance before you blame a script.