Subreddits

The most forgiving large subreddit for showing something you built. Self-promotion is the point of the sub rather than an exception to its rules.

Lead with a screenshot or a short clip. Posts that are just a link and a sentence get almost no engagement here.

Enormous reach and unforgiving rules. Works only for something free, instantly usable, and interesting without a signup.

No login walls. If the first thing a visitor sees is an email field, the post gets removed and often the account too.

Founders talking to founders. Good for process posts and honest numbers, poor for launch announcements.

Check the sidebar for the promo thread — most direct plugs belong there rather than in the main feed.

Very large, very heavily moderated, and deeply allergic to anything that reads like an advert.

The only reliable way in is a genuinely useful post that mentions your product once, near the end, as context rather than as an ask.

Has a recurring showoff thread that is the correct place for a project post. Posting outside it is the usual way people get removed.

Technical audience — talk about how you built it, not what it costs.

Smaller and more relaxed than r/SaaS, with a similar audience. A reasonable first place to test how you describe your product.

Low volume means a post stays visible for a day or more rather than an hour.

Explicitly for recruiting testers. Small, but everybody there is looking for something to try.

Say what you want tested and roughly how long it takes. Vague asks get ignored.