eSIM Rankings for Southeast Asia (11 Countries)

Our Southeast Asia rankings are built on a single objective metric: cheapest cost per gigabyte ($/GB) available from each provider for that country. We pull live plan data weekly from Airalo, Holafly, HelloRoam, Saily, and Nomad, record each provider's lowest $/GB for a given destination, then rank countries within Southeast Asia from cheapest to most expensive. No sponsored placements, no subjective scoring — only verified price data determines position.

Provider leadership varies by country across Southeast Asia's 11 destinations. In our rankings, the top-ranked provider for any destination is whichever of the five tracked providers (Airalo, Holafly, HelloRoam, Saily, Nomad) offers the lowest $/GB that week. The overall Southeast Asia region average sits at $2.36/GB, with Thailand currently setting the regional benchmark at $0.29/GB. Visit individual country ranking pages to see the head-to-head provider breakdown per destination.

Based on our scoring methodology, Southeast Asia eSIM prices span from $0.29/GB in Thailand up to $8.50/GB in Timor-Leste — a 29.3x spread across the region. 4 countries rank below $1/GB, making them the highest-value destinations in the region. The regional average of $2.36/GB is a useful benchmark: destinations ranking below it represent strong-value picks, while those above warrant closer provider comparison before purchasing.

In our rankings, $/GB is the primary factor because it normalises across different plan sizes and durations, making cross-provider comparisons fair. Secondary factors visible on each country's ranking page include total plan count (more options signal a competitive market), network speed tier (4G LTE vs 5G), and the spread between the cheapest and most expensive provider. For a Southeast Asia trip covering multiple destinations, check whether any provider ranks in the top position across all your stops — that consistency often beats switching providers per country.