So far, citizens of 81 countries (Country list for Vietnam e-visa) can apply for a Vietnam e-visa.
e-Visa Vietnam allows visitors to stay in Vietnam for up to 30 days, with one entry (1 month single entry). Therefore, if your country is in the list of 81 countries that Vietnam e-Visa supported and your trip is less than 30 days, then applying for the Vietnam e-visa is the perfect choice. The e-Visa will help to save a lot of time at the airport when you arrive. Vietnam e-visa holder just need to go straight to the Passport control and enter into Vietnam.
In addition, with an e-Visa, you can enter and exit Vietnam at one of 33 international checkpoints (including airports, land borders and sea border gates).
>> Check more about Vietnam e-Visa information here: https://www.vietnamimmigration.org/vietnam-e-visa-2019