Athenian democracy

Athenian democracy developed around the fifth century BC in the Greek city-state (known as a polis) of Athens, comprising the city of Athens and the surrounding territory of Attica, and is often described as the first known democracy in the world. Other Greek cities set up democracies, most following the Athenian model, but none are as well documented as Athens'.

Question: was athens the only democracy in ancient greece
Answer: no