Related Posts plugin. It's flexible and fast and simple.
As of April 2026, WP Simple Related Posts is a WordPress related plugin with 500 active installations and a 4.2/5 rating from 5 reviews. It has been downloaded 17K+ times in total. Requires WordPress 3.8.1+ and PHP false+. Available on WordPress.org since 2014. Last updated 2 years ago — may have compatibility concerns. Top alternative: Contextual Related Posts.
*Related posts based on categories, tags.
*Can be replaced and sort of related posts at admin screen.
*I can be added as an add-on another related posts algorithm.
You can make addon to use Addon Template.
You can use JSON REST API Endpoint. Require plugin JSON REST API
http://example.com/wp-json/posts/%post_id%/sirp_related/
http://example.com/wp-json/sirp_related/%post_id%/
http://example.com/wp-json/sirp_related/%post_id%/?filter[num]=5
| WordPress | 3.8.1+ requiredTested up to 6.3.8 |
| PHP | false+ required |
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