Listings in the least saturated segment, sorted by which ones send real people.
This is the least saturated segment on the route, and the one changing fastest. Most AI indexes are backlink-only, which is fine as long as you know that going in.
Some send real traffic, most only pass a link. Sort your list before spending evenings on it, and do the traffic ones first.
Many AI directories have both. The paid tier is rarely worth it until you know the free listing sent someone.
This is the genuinely new channel and the field is still thin. Very few products have done it properly yet.
These indexes are browsed by people comparing tools, not by engineers reading your docs.