Telecoms security boss Jeff Kuo says that fighting mobile phone fraud is a constant battle, and that Taiwan is on the front line.
"This is like a miniature of the world, here in Taiwan, where we see all kinds of fraud in advance," says Mr Kuo. "We can use this knowledge to protect other countries, because we can see what is going to happen first."
It says its artificial intelligence powered software constantly trawls more than 1.6 billion telephone numbers, both Taiwanese ones, and also ones from across Asia and other parts of the world, to block messages and calls from likely fraudsters.
Working with Taiwan's Criminal Investigation Bureau's (CIB's) "165 Anti-Fraud Program", Whoscall blocked more 52.3 million scam messages, and 13.1 million scam calls, last year in Taiwan alone.