Founded in 2015, Crisp is a relatively new entrant to the live chat space. They offer live chat, email and messaging campaigns and a knowledge base, amongst other features.
The application lacks some polish in a few areas. For example, some of the translations in the area are not great. Big companies may also struggle with a the lack of a Teams feature if they want to route chats to different teams. For most people though, these things will not be deal breakers.
Crisp has very straightforward pricing without any hidden extras, or variable pricing based on the number of messages you send, or leads that you track.