volmar

This plugin puts a global password selected by you on all posts. Based on Matt Mullenwegs plugin “Protect old posts”
I’ve looked for a plugin like this but couldn’t find one that fitted my needs so i this one. I hope it will be helpfull for someone else to.
BEWARE: This will write over all old passwords and replace it with the one you select.

Password Protect All Posts

This plugin puts a global password selected by you on all posts. Based on Matt Mullenwegs plugin "Protect old posts"

MattGeri

Pigeon.io

sabramedia

Pigeon is paywall software that allows you to hide your content from users by specifying paywall rules. It offers account management and subscription based billing for your readers and subscribers. Enable this plugin to start using the Pigeon Paywall on your WordPress website.
An account on <a href="https://pigeon.io" rel="nofollow ugc">Pigeon.io</a> is required for this plugin to function. Your paywall rules and account management are setup and managed inside your Pigeon.io account. This plugin enables the JavaScript scripts and widgets required to block your content from non-subscribers based on the rules you’ve setup in your Pigeon.io account. Please read the <a href="https://pigeon.io/terms-of-service" rel="nofollow ugc">terms of service</a> and <a href="https://pigeon.io/privacy-policy" rel="nofollow ugc">privacy policy</a> for Pigeon.io.

Pigeon Paywall

The official Pigeon Paywall plugin for WordPress

Password Protect All Posts vs Pigeon Paywall