Eye‑Fi did not natively support CompactFlash cards. The commonly discussed workaround was using an SD Eye‑Fi card in a CF adapter, but users and Eye‑Fi noted drawbacks such as reduced wireless range, slower transfer, and possible file corruption.

Later, Eye‑Fi began certifying some CF adapters for use with its SD cards on certain cameras, with compatibility guidance and setup instructions provided by Eye‑Fi. So the most realistic CF option mentioned is not a true CF wireless card, but an Eye‑Fi SD card plus a supported CF adapter.

Based on the answers provided, no widely recognized competing product offering the same wireless-transfer function as a native CF card was identified.

So, in short: native CF wireless options were not really available here; the practical route was a compatible CF adapter with an SD Eye‑Fi card, understanding the tradeoffs and checking camera compatibility first.