Rontu

PiwikCounter is a Counter which needs a Piwik installation under your control. Without it, it won’t work. 
It get’s its data through Piwiks API and caches the amount of visits until yesterday and just adds the amount of visits for the actual date.

PiwikCounter

PiwikCounter allows you to show the summary of (unique) visitors as a widget on your blog.

Openmost

Matomo Site Kit allows your WordPress instance to connect with Matomo Cloud or On-Premise. 
You can easily provide Matomo or Matomo Tag Manager tracking code. 
Get in touch with the dashboard and respect the law with GDPR script easy deployment.
Features:
<ul>
<li>Dashboard with analytics overview</li>
<li>Classic Matomo tracking code injection</li>
<li>Matomo Tag Manager (MTM) support with dataLayer</li>
<li>User ID tracking (SHA256 hashed)</li>
<li>GDPR consent mode options</li>
<li>Privacy opt-out shortcode</li>
<li>Post/Page analytics metabox</li>
<li>WordPress Dashboard widget</li>
<li>Exclude tracking by user role</li>
</ul>

Matomo Site Kit

A complete Matomo integration for WordPress with dashboard, data layer and code injection.

PiwikCounter vs Matomo Site Kit