prunderground.com
In short: PR Underground (prunderground.com) accepts press-release distribution. It is paid to submit, takes real preparation and a written pitch, and scores 71/100 on our impact ranking (useful).
Publish a factual your tool milestone or research announcement with a clean landing-page URL and media assets.
Editorial approval is required; syndicated copies, indexing, and link attributes are outside AltFTool’s control.
Priority is high, which sets the band. It is paid and involved to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.