Automattic

INN Labs

This WordPress plugin gives site administrators a way to insert widgets such as ads, newsletter signups, or calls to action into posts at set intervals.
The plugin registers a configurable number of widget areas.
The plugin can programmatically insert these widget areas into posts when the page is rendered. This setting can be overridden on a per-post basis via a post meta box or a filter.
If the programmatic insertion doesn’t work for a particular post, users can choose to place specific widget areas at specific spots in the post using shortcodes or blocks.

Super Cool Ad Inserter Plugin

This plugin enables the insertion of widget areas in your post's content via programmatic insertion at display time, via a shortcode, or via bloc …

setupad

Setupad WP Ads

Simple and powerful ad insertion tool for WordPress users with a wide range of features to insert, manage, and optimize your ad inventory.

Super Cool Ad Inserter Plugin vs Setupad WP Ads