Most travelers to Azerbaijan need either an eVisa or a visa obtained in advance — but citizens of a number of countries, mainly within the wider region, can enter without any visa at all, typically for stays of 30 to 90 days. This is separate from the eVisa system used by the majority of nationalities.
Visa-free access generally applies to citizens of Georgia, Turkey, Ukraine, and several Gulf states. Rules can change, so always confirm against the official source before travel — we keep this page updated, but the State Migration Service of Azerbaijan is the definitive reference.