SaaSHub

SaaSHub indexes software by category and alternative, giving each product a comparison-friendly page that ranks for replacement searches. It is independent of the big review networks, which keeps listings straightforward.

Submission is free with sponsored options available; entries are editorially reviewed and an account is required. Users can vote and review, and outbound links are reported dofollow — unusual among comparison sites.

At DR 79 and roughly 500K estimated monthly visits, it is one of the better-value free listings for SaaS: modest effort, a real link, and traffic from people comparing tools.