But this is non-unique product. e have a lot of popular non-blockchain massangers and have some blockchains massangers. So they are not the first who are doing this
The difference is that TOP already has 80 million users of it's own through a VoiP/Social, Encrypted Chat, and VPN apps. These users will be ported to TOP Network. Most projects don't have any users, let alone 80 million users many of which are paying customers. Loose "partnerships" with companies that have users is not the same. Also decentralized messengers is just one use case, although I would note that it's not just a "blockchain messenger." TOP is building/built two separate things: a high-performance blockchain, and a full-stack decentralized communications infrastructure helped by the existing infrastructure from Dingtone, CoverME, and SkyVPN. Most only have the blockchain part.
Also, TOP employs RCS communications protocol, which is considered the future of messaging. Google and other big names are all switching. Any app that uses RCS can be made interoperable, so TOP communications DApps could work with other popular communications apps, so the user does not have to choose one and be walled off from the rest of the world.
But this is not 80 mln blockchain users, right? And where have you got this numbers? How TOP tokens (coins) will be used here? Do they have any usecase?