That is according to a report in the New York Times newspaper, which says that while all three brands will continue to be standalone apps, they will be integrated in order to ensure that messages can travel across the platforms.
It's been reported that the initiative is being driven by Facebook founder Mark Zuckerberg, who hopes to have completed the integration work by the end of the year.
Facebook, for its part, has confirmed that it is busily working on some of its ambitious plans - although the company refused to reveal specific details about its efforts.
In a statement, the social networking platform explained: "We want to build the best messaging experiences we can; and people want messaging to be fast, simple, reliable and private.
"We're working on making more of our messaging products end-to-end encrypted and considering ways to make it easier to reach friends and family across networks."
Despite this, Facebook admitted it has already staged a lot of "discussion and debate" about how the proposed new system ought to be implemented.