The company selected the most desirable destinations for backpackers around the world based on average costs, crime rates, mobile Internet speeds, and the availability of couch surf hosts and free attractions.
Hanoi has 285 hostels that cost visitors an average of $11 a night, the company says.
The average cost of groceries was $21.02 per day while the average public transportation cost was $0.3 per journey. Hanoi is home to 225 free tourist attractions and has an average mobile internet speed of 43.32 Mbps.
Armenia’s capital Yerevan was the cheapest destination for backpackers, followed by Baku in Azerbaijan and Thailand’s Bangkok.
The rest of the list included Seoul, Madrid, Budapest, Sofia, Beijing and Vienna.