There is nothing exciting about mistral but they're the only european ai lab i've even heard off (jeppa doesn't count)

there was "H" at paris at the time, they raised 200M or so, but never got so much visibility. don't know at which stage they are now or if they accomplished something

All original scientist co-founders of H have left.

From what I've seen in the past few months, Mistral is the unique European lab still trying to compete (I wouldn't count Poolside as EU).