Problem counting visits

On my main website, I have a huge difference between Matomo visits and Google Analytics visits, while pages views are quite similar.

Daily statistics on GA : 40K pages views, 15000 visits
Daily statistics on Matomo : 37K pages views, 2000 visits

I know there is always a small difference, I have other websites with both matomo and GA, but for this one, it seems there is a problem.

If someone can help…
thanks a lot!

Hi,

The 40K vs 37K can definitely be explained by DoNotTrack and similar things. But 2000 visits sounds a bit wrong. Is it possible that every website visitor has the same IP address because your Matomo server is behind a reverse proxy?