Everyone selling a community says the engagement is better than social. Almost nobody shows the arithmetic. Here it is, using the same formula on both sides.
What is the comparison, exactly?
Interactions on a post, divided by audience size. On Instagram that means likes plus comments over followers. On Skool it means upvotes plus comments over members. Same numerator shape, same denominator shape.
The reference point is the Rival IQ / Quid 2026 Social Media Industry Benchmark Report, covering 2,100 brands across 14 industries: a median Instagram post reaches 0.3% of followers. Facebook runs between 0.02% and 0.23% depending on industry.
The Skool cut: 24 tracked communities, 3,110 posts over 90 days, non-import posts, communities of 25+ members. Median 5.1% of members interact with a typical post.
About seventeen times Instagram's median. That is the headline, and the next section is why you should not quote it bare.
Where does the number come from, and what inflates it?
The size confound is real and we publish it rather than footnote it. Dividing interactions by member count mechanically inflates the rate in small rooms — twelve people reacting in a 60-member community is 20%, and the same twelve in a 6,000-member community is 0.2%.
So here is the gradient rather than the headline alone:
The rate falls by a factor of 22 from the smallest band to the largest. Anyone quoting "17× Instagram" without that gradient is quoting a number that depends heavily on which communities happened to be in the sample.
And the claim survives it. Every band clears Instagram's median — including the single 1,800-member community at 0.61%, which is still roughly twice Instagram. So does the worst individual community we track, at 1.63%, about five times Instagram's median.
That is the defensible form of the claim: not "Skool is 17× better", but "across every size band measured, and including the least engaged community in the sample, a Skool post reaches a larger share of its audience than a median Instagram post reaches of its followers."
The mismatch worth stating: those are brand accounts posting to followers; these are community owners posting to members. Organic reach on Instagram and Facebook is also actively suppressed by the platforms, which is part of why the gap is so wide. The formula is identical. The situations are not. Read it as direction, not as a precise multiple.
Why is the gap so large?
Three structural differences, none of them about content quality.
Nobody is throttling the feed. Instagram and Facebook decide who sees a post, and their commercial incentive is to show less of it for free. A Skool post goes to the community.
The audience opted into a room, not a personality. A follower accumulated over years of scrolling has a weak relationship with any individual post. A member who joined a community — particularly one with a paid door — arrived for a purpose.
The denominator is smaller and better. This is the uncomfortable one. Part of the "advantage" is simply that a Skool community is a few hundred people rather than a few hundred thousand, and rate-per-audience rewards small audiences. That is not cheating, but it is why size on Skool and size on social are different objects and should not be compared directly.
How should you use this?
As a sales argument, use the band, not the headline. If you are selling a community to someone with an Instagram following, the useful line is the one for rooms of their likely size. "Thirteen times Instagram" for a 300-member room is both more credible and more checkable than a platform-wide multiple.
As a self-diagnosis, ignore Instagram entirely. The comparison tells you the category is working; it tells you nothing about whether your community is. For that you want your own rate against communities your size — what is a good Skool engagement rate is the right benchmark, and how to calculate it is the method.
And know which figure you are quoting. Skool's own engagement rate counts visits. This one counts interactions on posts. They are different measurements with the same name, and mixing them is how owners end up confidently comparing two unrelated numbers.
These figures come from The State of Skool 2026, an independent measurement of Skool communities, read against the Rival IQ / Quid 2026 benchmark. See the full report for the full comparison and 21 other findings.