There are no "free" messenger in this world. They all need money to run!

Simplex Chat got

370.000 Dollar Venture Capital from Village Global

https://www.crunchbase.com/organization/simplex-chat

https://www.villageglobal.vc

means from: Jeff Bezos, Mark Zuckerberg, Bill Gates = Big tech is already involved with SimpleX Chat!

I wish you good luck on that lame messenger!