Forget to mention, but Hungary (Budapest). I assume they are quick, because they accept e-visa application only from the following countries:
Hungary
Croatia
Bosnia and Herzegovina
Montenegro
Kosovo
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Before the application I sent them an email with my questions (and 3 another email) and had to call them 2 times to get a response. It took about 6 business days in total. So they had information about me already, even before I applied.