The idea of sending a fax might sound like something from the 1990s, but faxing remains a critical tool in industries like healthcare, finance, real estate, and legal services.

In an age of AI co-pilots and instant messaging, suggesting that a technology from the 1980s holds the key to modern startup security sounds like a punchline.

You can send a fax from your iPhone using a third-party app. Most fax apps are free, but you need to pay a subscription fee to send or receive faxes within the app. To send a fax, you'll need to know ...