Yes, Roamify offers unlimited data eSIM plans for Saint Martin. The provider lists several options with a data cap of Unlimited, ranging in validity from 1 day to 30 days and in price from about $4.50 to $65.00 USD. All of these plans use 5G networks, allow tethering, and note that speed may be throttled after heavy use.
Because the plans are unlimited, they are subject to a fair‑usage policy that can reduce speeds after significant data consumption. Travelers who are concerned about potential speed restrictions should contact Roamify directly to confirm the typical amount of data that can be used at normal speed. The validity period for each plan begins when the eSIM first connects to a network.