Google Spaces lived for so short, it is not included in the list and so far nobody has mentioned it in the comments. It was a product that me and my friends hav

Google Spaces lived for so short, it is not included in the list and so far nobody has mentioned it in the comments. It was a product that me and my friends have long thought of. I think if it were implemented in a way that focused on chat but not on shared links, it could have been a success. I still believe that niche future will find its way into a popular chat application.