eSIMatrix does not offer an unlimited‑data eSIM for Saint Lucia. The provider’s catalogue lists only fixed‑data plans, such as the Saint Lucia 20 GB plans valid for 5, 10, 15 or 30 days at prices ranging from $76.00 USD to $93.00 USD, and a Caribbean 20 GB plan valid for 5 days at $100.50 USD.
Choosing a fixed‑data plan can be more cost‑effective for most travelers unless the user requires continuous high‑volume data. The 20 GB options provide a generous allowance that can meet typical browsing, streaming and occasional media download needs during a short stay in Saint Lucia.