Seline Review (2026): Pricing, Features & Honest Verdict

TLDR

Seline is a privacy-first web and product analytics tool built as a Google Analytics replacement. Every feature sits on one plan, which is refreshing, but there is no free tier at all. Best for: bootstrapped SaaS founders who want funnels and revenue data without a Mixpanel bill. Price: from $9/mo. Free plan: no. Rating: 7.6/10.

What is Seline?

Seline is a cookieless analytics platform that tracks website traffic and product usage in the same dashboard. You drop a script on your site, and you get visits, pageviews, bounce rate, referrers, countries, devices and UTM breakdowns in real time. Where it goes further than most privacy analytics tools is the product layer: custom events, individual visitor journeys, multi-step funnels, user profiles with custom attributes, and revenue attribution wired into Stripe, Polar and Shopify. The tracking script is roughly 2KB, which the company claims is about 23 times lighter than Google Analytics. No cookies means no consent banner in most setups.

The company is a small bootstrapped team based in Warsaw, Poland, and the product launched in 2024. Data lives on servers in Germany, which matters if you sell into the EU and your legal team keeps asking where visitor data ends up. Seline sits in a crowded space. Plausible, Fathom, Simple Analytics and Matomo all attack the same problem from the privacy side, while Mixpanel, Amplitude and PostHog own the product analytics side. Seline’s pitch is that you should not need two tools and two invoices to answer “where is traffic coming from” and “where are users dropping off”. We dug into it, and that pitch mostly holds up.

What Are Seline’s Key Features?

Real-time dashboard

The main view is a single scrollable page: total visits, views per visit, bounce rate and average visit duration up top, then referrers, countries, devices, browsers and UTM parameters underneath. There is a live globe showing visitors on your site right now, which is a gimmick, but a good one for a launch day. Filtering is the part that actually matters. You can stack filters across any dimension and every chart below updates, so answering “how do mobile visitors from Reddit behave” takes about four clicks instead of a custom report builder session. Bot detection runs by default, and Seline separately labels traffic arriving from AI assistants.

Funnels and visitor journeys

This is the part that separates Seline from a plain traffic counter. Funnels let you chain page views and custom events into a multi-step conversion path, then see exactly which step people abandon. Journeys go the other direction: pick a single visitor and replay their page-by-page path with the custom events and event properties they fired along the way. On most privacy analytics tools, this level of detail is either missing or sold as a separate enterprise SKU. Here it is on the same plan as basic pageview counting.

Revenue attribution

Seline connects to Stripe, Polar and Shopify and ties revenue back to the referrer and UTM parameters that brought the customer in. That means you can see which campaign actually produced paying customers rather than which campaign produced the most sessions. For a small SaaS or store, this is the single most useful number in the dashboard, and it is the reason to pick Seline over Plausible or Fathom, neither of which handles revenue this directly.

User profiles and churn signals

Identify a logged-in user, attach custom attributes, and Seline shifts from session-based analytics to user-based product analytics. You get engagement and churn views built on individual accounts instead of anonymous sessions. It is optional, so you can run Seline in fully anonymous mode on a marketing site and in identified mode inside the app. The trade-off is obvious: once you identify users, you are back in territory where your privacy policy needs to say so.

AI assistant and MCP access

There is a natural language chat layer over your data that answers questions and generates CSV exports, plus an MCP interface so an AI coding assistant can query your analytics directly. Seline also flags traffic arriving from AI tools such as ChatGPT, Perplexity and Claude, which is a genuinely useful signal in 2026 as more discovery moves out of classic search. There is a public API and ad-blocker bypass on the same plan.

How Much Does Seline Cost?

Seline starts at $9 per month and scales with your traffic on a single slider. At 25,000 pageviews per month the price is $14 per month. There are no tiers, no seat charges and nothing locked behind an upgrade: funnels, journeys, profiles, revenue analytics, public API, unlimited websites, forever data retention, priority support and advanced bot detection are all included at every price point. Annual billing gives you two months free. There is a 7-day free trial with no credit card required, and an optional $99 done-for-you setup where the team installs Seline, wires up custom events and configures your core funnels.

The important caveat is that Seline has no free plan and says so plainly in its own FAQ. That is a deliberate choice by a bootstrapped team funded only by subscriptions, and we respect the honesty, but it does put Seline behind PostHog, which gives away a free tier most early stage products never outgrow. Against the closer comparisons the math is better. Plausible starts at $9 per month for 10,000 pageviews and climbs to $19 at 100,000. Fathom starts around $14 to $15 per month for 100,000 pageviews. Mixpanel, which is the closest thing to Seline’s product analytics features, gets expensive fast once you leave its free events allowance.

One detail worth knowing before you buy: pricing is per website by default. You can link multiple sites under one Pro subscription so they share an event limit, which is what most people will want, but agencies running client sites can also keep separate projects with separate payment methods. If you exceed your limit, Seline says it only pushes an upgrade after two consecutive months over, or if you blow past the limit fivefold, which is a sane way to handle launch spikes.

Who is Seline Best For?

Seline is built for one specific person: the founder or small team that owns the whole funnel and does not have an analytics engineer. If that is you, the appeal is that you can answer marketing questions and product questions from the same screen without exporting anything.

Use Seline if you run a small SaaS, a digital product or an ecommerce store and you are currently paying for two tools: one for traffic, one for product events. Seline collapses that into one bill that most teams will keep under $20 a month. Use it if you sell into the EU and want a straight answer about data residency. Use it if you have been putting off setting up funnels because your current analytics tool wants an enterprise contract to unlock them.

Skip Seline if any of the following apply:

• You need a free plan. There is not one, and a 7-day trial is short for evaluating an analytics tool that needs a few weeks of data to be useful.
• You need to self-host. The backend is closed-source SaaS only. Plausible Community Edition and Matomo both let you run the whole thing yourself.
• You need SOC 2 or ISO certification on paper. Seline is a tiny bootstrapped team and does not carry third-party security certifications, which will stall a procurement review at any mid-size company.
• You want deep behavioural analysis like cohort retention curves, session replay and experimentation. That is PostHog and Amplitude territory.

Best Seline Alternatives

Plausible

The default privacy analytics pick and the most direct rival. Plausible starts at $9 per month for 10,000 pageviews, $19 per month at 100,000, and offers an open-source Community Edition you can self-host for free. It is simpler than Seline and has a longer track record, but it is a traffic tool first. Funnels exist, revenue attribution and individual user profiles do not, and there is no free plan either, just a 30-day trial.

Fathom Analytics

Fathom starts around $14 to $15 per month for 100,000 pageviews, which is a much larger allowance than Seline gives at the same price. It includes forever data retention and API access on every plan, and it has been around long enough to be a safe institutional choice. Pick Fathom if you mostly care about traffic volume and want the cheapest cost per pageview. Pick Seline if you want funnels, journeys and revenue attached to that traffic.

PostHog

The heavyweight option and the one that undercuts Seline hardest on price. PostHog has a genuinely free tier with a large monthly events allowance, then charges on usage, and it bundles product analytics, session replay, feature flags and experiments. It is also open source and self-hostable. The catch is complexity: PostHog takes real setup effort and its interface is built for product teams, not for a founder who wants a clean dashboard on a Monday morning.

Final Verdict: Is Seline Worth It?

Seline earns a 7.6. The single-plan pricing is the best thing about it, and we mean that as a compliment to the product design, not just the invoice. Getting funnels, visitor journeys, user profiles and Stripe revenue attribution for $14 a month at 25,000 pageviews is a real deal, and the dashboard is fast and legible in a way Google Analytics 4 has never managed. The EU hosting and cookieless tracking remove two compliance headaches at once.

We also like that the company is upfront about its limits. The pricing FAQ says flatly that there is no free plan and explains why. The overage policy is written in plain language. That kind of honesty is rarer than it should be in analytics pricing, where most vendors bury the moment your bill jumps.

What holds it back is maturity, not capability. A four-person bootstrapped team with no security certifications, no self-hosting option and no free plan is a harder sell than Plausible or PostHog, and a 7-day trial gives you very little time to judge an analytics tool. If you are a founder or small team that wants one tool instead of two and can live with a young vendor, Seline is worth the $14. If you are buying analytics for a company with a procurement process, go with Plausible or PostHog and revisit Seline in a year.