Dreadnought

Dreadnought is Free-to-Play.

That said, the PS4 version has a pretty nice Players-vs-Enemies mode that has yet to make its way to PC.

The game's grind is horrid, very much like WoT, but worse in a few regards, namely that starting from Tier 3 you'll be encountering players that have ground out special buffs for their ships that require you to grind through virtually every ship tree in the game. The buffs, "Briefings" in game parlance, are hugely influential on ship capabilities and create a situation where you're not really playing the same game when you don't have them and other players do.

Also heal-balls exist, and teams of healers can drag combat out for an extremely long period of time... most of the match, generally and your team will likely not be able to do anything to counter it.