aidirs.best
In short: Getting listed on AiDirs is unpriced — no fee is published either way. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Submit AI feature listing.
Submit AI feature listing.
Long-tail directory; verify quality.
Open the submission page on aidirs.best and complete its form — that is the "Open submit page" link at the top of this page.
Long-tail directory; verify quality.
Priority sets the band — this one is later. Cost (not stated) and effort (moderate) move it within that band, which puts it in the long tail tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.