The site allowance is the standout

Fathom states that every plan includes at least 50 sites, and that the bigger pageview plans include more. Most analytics pricing treats additional sites as the upgrade lever, so a floor of fifty changes the arithmetic completely for agencies, portfolio owners, and anyone who runs a main site plus a scattering of microsites, docs, and landing pages.

It pairs that with an all-sites view and shareable dashboards, so a portfolio is something you actually look at as a portfolio rather than fifty separate tabs.

History that does not quietly disappear

Fathom describes forever data retention: while you are a customer, your full analytics history stays available. That is a meaningfully different promise from a rolling window, and it matters more than it sounds — year-over-year comparison is the analysis most often ruined by a retention limit nobody checked at purchase.

One billing detail worth planning around, stated plainly on its own pricing page: if you use the custom event tracking system or the API, those requests are counted as if they were pageviews. That is easy to model once you know it, and knowing it up front prevents a surprise.

A deliberately simple, deliberately managed product

Fathom is proprietary and managed-only, with a 7-day free trial rather than a free tier. That focus shows in the product: instant filters, live visitors, custom events and revenue, UTM support, saved views, shared dashboards, an all-sites view, reports, exports, an API, and a Google Analytics importer for moving historical data across.

The aggregate model means dashboards do not display personal information about individuals, and Fathom describes an isolation process that keeps EU visitor data within the EU. As always, read the current data policy and processing terms against your own audience.

Who tends to love it

Fathom suits people who want privacy-friendly analytics without operating anything, who value a fast simple dashboard, and above all who run many sites. If your portfolio has more sites than traffic, the fifty-site floor plus long retention is likely to be the most economical serious option in the category.

It also suits teams migrating away from a heavier setup who want their old history to come with them, which is what the Google Analytics importer is for.

Direct answers

Questions this profile answers

How many sites does Fathom include?

Fathom states that every plan includes at least 50 sites, and that the bigger pageview plans include more.

Does Fathom have a free plan?

There is no free tier. Fathom offers a 7-day free trial of the paid product.

How long does Fathom keep data?

Fathom describes forever data retention: while you are a customer, your full analytics history stays available.

Evidence

Primary-source ledger

  1. Product featuresFathom Analytics · accessed 9 August 2026
  2. Pricing, site allowances, and event billingFathom Analytics · accessed 9 August 2026

Scope note: Plan prices, allowances, features, and policies change. Every figure here is dated and linked to the vendor’s own page — check that page for the terms available to you today.

Found an outdated fact or a material omission?Read the corrections and recheck policy.