Currently 0 A.D. has the following team bonuses:
Athenians: Allied Warships −25% construction time.
Britons: Allied Healers −20% resource costs.
Carthaginians: Allied Markets +10% international trade bonus.
Gauls: Allied Structures −20% technology research time.
Iberians: Allied Citizen Javelinists −10% resource costs.
Kushites: Allied Elephants −20% resource costs and training time.
Macedonians: Allies +20% barter sell prices.
Mauryas: Alli