alternativeto.net
In short: Getting listed on AlternativeTo is free. Plan for about 10 minutes — it is a form plus links and assets you already have.
What they ask for: Create account, wait cooldown if new, submit your tool as platform alternative.
Create account, wait cooldown if new, submit your tool as platform alternative.
Avoid per-tool submissions for calculators/converters; no URLs in description.
Open the submission page on alternativeto.net and complete its form — that is the "Open submit page" link at the top of this page.
Avoid per-tool submissions for calculators/converters; no URLs in description.
Priority sets the band — this one is do first. Cost (free) and effort (quick) move it within that band, which puts it in the highest impact tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.