RedteaGO

RedteaGO built its reputation on Asia pricing and hasn't let up. At $0.52/GB in key markets (Thailand, Vietnam, Indonesia), it undercuts most competitors on per-gigabyte cost. Coverage spans 180+ countries, and activation takes just two clicks. Global plans also bundle a VPN, which adds value if privacy matters on your trip.

Target this if you're heading to Southeast Asia and want to maximize data on a tight budget. The VPN bonus makes it solid for anyone concerned about public WiFi security, though pricing outside Asia loosens that cost advantage.