Clerion vs. Fathom
Fathom is a well-made private tool. Clerion adds the written answer.
Three things Fathom does not do
Clerion writes the answer instead of showing a chart
The same privacy, with more included
Find problems early
Side by side
Price
Clerion $14/mo (Solo, 25k pageviews) up to $99/mo (Business, 1M pageviews)
Fathom From $15/mo for 100k monthly pageviews (50 sites included)
Free tier
Clerion No. 14-day trial, no card to sign up.
Fathom No, 7-day trial
Cookies
Clerion None
Fathom None
Consent banner
Clerion Not needed
Fathom Not needed
Open source
Clerion No
Fathom Fathom Lite only
Hosting
Clerion EU infrastructure
Fathom GDPR-compliant, EU isolation available
Best for
Clerion Founders and small teams with no analyst, who want the interpretation done for them rather than another dashboard to read.
Fathom Agencies and anyone running many small sites, since the base plan already covers 50 of them.
Watch out for
Clerion It is built for site-wide traffic and growth questions. If you need programmatic event pipelines for a complex product funnel, a dedicated product-analytics tool fits better.
Fathom No free tier at all, and like Plausible it shows you the numbers without telling you what to do about them.
Read from each vendor’s own pages, July 2026.
Feature by feature
Reads the data for you
Clerion A written briefing every day
Fathom Not built in
AI assistants as a channel
Clerion A channel of their own, plus the apps and tagged links
Fathom Not listed on their site
Revenue by source
Clerion Each payment credited to the source that brought the visitor
Fathom Event values
AI-readiness of your pages
Clerion Every page scored, the site as a graph
Fathom Not built in
Asks leaving visitors why
Clerion Yes, five answers, once per visitor
Fathom Not built in
Rage clicks
Clerion Yes, by page and element
Fathom Not built in
JavaScript errors
Clerion Yes, grouped and explained
Fathom Not built in
Deploy markers
Clerion Yes, from one call in CI
Fathom Not built in
Session replay
Clerion Not built in
Fathom Not built in
Product analytics
Clerion Funnels and conversion, no cohorts or flags
Fathom Events
Capabilities as each vendor describes them on its own site, July 2026. A capability we could not find is marked not built in.
A simpler dashboard still has to be read
Fathom strips analytics to one clean screen with no cookies and no banner. Simpler is not the same as answered. You still scan the numbers each week and decide what matters. Clerion writes the decision.
When Fathom is the right tool
If you want straightforward, private traffic numbers on a fast dashboard, Fathom is a solid choice. Clerion fits when you want the briefing written for you.
Switching from Fathom
Export your Fathom data as CSV and drop it in. Clerion reads it in your browser and keeps two years of history. Paste one line, remove the Fathom script, and you are done.