Yes. Thank these folks:

Mozilla employees Josh Aas and Eric Rescorla, together with Peter Eckersley at the Electronic Frontier Foundation and J. Alex Halderman at the University of Michigan. Internet Security Research Group, the company behind Let's Encrypt, was incorporated in May 2013.

They created the ACME standard, the open source community got on board, and soon enough everyone bought in, a massive step forward for Internet security and the benefit of open source.