Launch HN
Official launches by Y Combinator startups. Every one is shown.
Show HN
People showing something they built. Hundreds are posted each week, so only those with 20+ upvotes appear. Each day shows its top five; tap “more” for the rest.
SF San Francisco
For Launch HN, the company's city comes from YC's public company directory. Show HN posts don't say where they're from, so their location is unknown rather than guessed.
AI AI
Labelled from the post's title and description (and YC's own tags for Launch HN). Simple word rules, so expect the odd miss.
Hacker News is the only launch source. Weeks run Monday to Sunday, San Francisco time, and refresh every ten minutes.