About 30 other countries do this.
But a smaller group are close to what the US does:
Countries most similar to the U.S. (near-pure jus soli)
These are the closest matches:
Core group (very close to identical)
Canada
Mexico
Brazil
Argentina
Chile
Peru
Uruguay
Venezuela
These function almost the same as the U.S. in practice.
Also very close (minor technical exceptions)
Still broadly automatic at birth:
Colombia
Ecuador
Paraguay
Bolivia
It’s interesting this is a “New World” thing.