The ideal chat tool and moreover, French! Special mention to the triggers which leave a plenitude of possibilities, and all the other features. I love Crisp, and on top of that there is a Free plan. A treat.
I discovered Tidio on the Wordpress marketplace, and it's a great alternative for using chat on your site. The free plan is more than generous in features and Tidio excels in its use on ecommerce sites. Efficient.