Telnyx

Telnyx is an IoT and enterprise communications platform offering eSIM connectivity across 190+ countries with minimal activation friction: $1 per SIM is a straightforward one-time setup fee. Pricing follows a pay-as-you-go model for data usage rather than packaged daily allowances. Telnyx's API-first architecture lets developers integrate connectivity into applications programmatically.

Telnyx serves best if you're building an app that needs Thailand connectivity as a feature, or if you value developer-friendly tooling and per-megabyte billing over pre-packaged travel plans. As a consumer buying a single eSIM for a trip, Telnyx's enterprise positioning makes it less convenient than consumer-focused competitors; its strength lies in volume and integration, not simplicity for one-off travel.