Moderation, replies and the spam controls are all in the free plan
Hide a comment for abuse and visitors are told how many are hidden
No account, no password and no email address asked of your readers
Links in comments are never clickable, so link spam has no payoff
Comments lets your visitors say something on any page, and keeps every word in your own site's CMS.
A reader types a name and a comment. No account, no password, no email address - we never ask for one, so there is no list of your readers' addresses anywhere.
You moderate. Choose whether new comments appear straight away or wait for your approval, hide one for abuse with a note about why, show it again later, and reply as the site owner. All of that is in the free plan.
Hiding is possible and visible: when you hide a comment, visitors are told how many are hidden. The app never deletes anything.
On spam - links in comments are never clickable, a comment with several links waits for you, and there is a hidden trap and a per-page rate limit. No captcha, because a captcha sends your readers' details to someone else.
What it does not do: no members-only mode, no visitor threads, no likes or voting, no report button, and nobody can edit or remove their own comment afterwards, including you through this app. A patient spam script with no links in it will get through; hold comments for approval if that matters.
Free: 100 new comments a month. Pro, $4.99 a month, removes the limit.