Public APIs publishes a catalog of startups and software that founders can still join.
Directories with a public submission form
These sites take a URL through a form rather than a public profile or a guest article.
1010 destinations
Tekpon collects software profiles and comparisons for people choosing a tool.
SaaS Genius collects software profiles and comparisons for people choosing a tool.
TechnologyAdvice collects software profiles and comparisons for people choosing a tool.
Startup Ranking publishes a catalog of startups and software that founders can still join.
acidtools.com is a catalog of AI products: you can list a tool there, and people browse what already exists.
Sites Directory publishes a catalog of startups and software that founders can still join.
Robingood publishes a catalog of startups and software that founders can still join.
Agni publishes a catalog of startups and software that founders can still join.
Site Jabber publishes a catalog of startups and software that founders can still join.
SpringWise publishes a catalog of startups and software that founders can still join.
TrustMRR publishes a catalog of startups and software that founders can still join.
Openhunts publishes a catalog of startups and software that founders can still join.
Firsto publishes a catalog of startups and software that founders can still join.
Super Launch publishes a catalog of startups and software that founders can still join.
SiteLike publishes a catalog of startups and software that founders can still join.
Directory Web Promotion publishes a catalog of startups and software that founders can still join.
IdeaKiln publishes a catalog of startups and software that founders can still join.
NextGen Tools publishes a catalog of startups and software that founders can still join.
Site Promotion Directory publishes a catalog of startups and software that founders can still join.
Weboworld publishes a catalog of startups and software that founders can still join.
BAI.tools is a catalog of AI products: you can list a tool there, and people browse what already exists.
Tran publishes a catalog of startups and software that founders can still join.
AI Library is a catalog of AI products: you can list a tool there, and people browse what already exists.
When a submission form is the right door
A form is the usual path for product directories: you send a URL, a short description, and often a logo. Approval is not automatic, and the link can be dofollow or nofollow.