Bootstrappers 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
Indian Yellow Pages publishes a catalog of startups and software that founders can still join.
Younoodle publishes a catalog of startups and software that founders can still join.
stashli.st publishes a catalog of startups and software that founders can still join.
Web App Rater publishes a catalog of startups and software that founders can still join.
Tip Season publishes a catalog of startups and software that founders can still join.
RankYourAI publishes a catalog of startups and software that founders can still join.
600.tools publishes a catalog of startups and software that founders can still join.
Feed My Startup publishes a catalog of startups and software that founders can still join.
Find Cool Tools publishes a catalog of startups and software that founders can still join.
First 100 Users publishes a catalog of startups and software that founders can still join.
Indie Hustles publishes a catalog of startups and software that founders can still join.
Karo Startup publishes a catalog of startups and software that founders can still join.
KitDB publishes a catalog of startups and software that founders can still join.
MicroStartups publishes a catalog of startups and software that founders can still join.
Next Big Product publishes a catalog of startups and software that founders can still join.
Sick Tools publishes a catalog of startups and software that founders can still join.
SpsFeed publishes a catalog of startups and software that founders can still join.
Startup Button publishes a catalog of startups and software that founders can still join.
Startup Collections publishes a catalog of startups and software that founders can still join.
Startup Founders publishes a catalog of startups and software that founders can still join.
Startup Wizz publishes a catalog of startups and software that founders can still join.
State of Tech publishes a catalog of startups and software that founders can still join.
The Apple Google publishes a catalog of startups and software that founders can still join.
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.