We rank fan engagement, not club size.
Our Fan Engagement Score (FES) measures the size, growth and commitment of a club's fanbase across social, matchday and digital channels. It's a weighted index built from four core pillars.
Each pillar is scored 0–100 relative to the club's league, then blended by weight into a single score out of 100. Scores compare clubs within their league — a pillar without enough data redistributes its weight rather than counting as zero. Methodology version fes-v1.
The total size of a club's owned fanbase across the major social platforms.
How fast a club's total fanbase is growing month over month, relative to its league.
How well a club fills its ground — average home attendance measured against stadium capacity.
Matchday turnout relative to the size of the club's digital fanbase — devotion per follower.
We collect public data monthly from each platform, plus official matchday attendance reports.
Each pillar is scaled 0–100 against the club's league peers, on a log scale where raw counts span orders of magnitude — so every club competes on the same scale and sheer size can't dominate.
The four pillar scores are blended by their weights into one score. A pillar that can't be computed yet — like momentum in a club's first ranked month — redistributes its weight instead of counting as zero.
Three of the four pillars — Social Fanbase Strength, Social Engagement Momentum and Relative Fan Intensity — are scaled 0–100 against a club's own league peers. The score answers “how strong is this club inside its league?”, not “how strong is this club in the world?”. Matchday Commitment is the exception: it is a plain fill rate (average attendance ÷ capacity) and means the same thing in every division.
That is deliberate. Pound-for-pound is the point — a well-supported club in a smaller division should not be buried by a global giant's raw follower count.
Follower growth compares like with like: the current and previous month's totals are both summed over the platforms included in both months. A platform entering or leaving coverage can therefore never masquerade as growth. When the two months share no included platform, growth is shown as – until the next comparable month.
We aggregate public data from the platforms fans actually use, plus official attendance reports.
Sources are reviewed regularly to ensure quality and consistency.
Metrics on club pages carry a small provenance dot naming where the number came from and when it was last touched. Colour is the status: green = verified against the source, blue = confirmed by the club itself, orange = AI-collected and accepted by hand, teal = auto-published, gold = entered by hand, grey = no source recorded, magenta = under review after a community report (including while the agreed correction is still being applied), lime = corrected once that correction has been published. The fill is the proof: a filled dot means the original we read is archived on file — a screenshot of the source, or the raw record the number came from — and a hollow dot means we are still collecting that proof. Most numbers arrive through our automated collectors and publish optimistically, the moment the source, the month's growth pattern and a second reading all agree; they carry the Auto-published dot until a person checks them. We never present a machine-published number as human-verified, and we show the state of our data honestly rather than dressing it up. Every dot opens what we know about the number and carries a "Report a problem" link: a report never removes data — it starts a review that ends in a correction, with the earlier value kept in the change history.
The Fan Engagement Score is an independent estimate based on public data. It is designed to compare fan engagement signals, not official club performance or financial results.
Scores are recalculated monthly and published on the 1st of each month. Rankings update shortly after.
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