Live Chat Room

Hello all, I have ran into quite the predicament while creating my new found site. I have been looking for a lightweight chat solution that is also free. I have tried over 10 plugins and considered IRC and Slack. But now I have come to you for suggestions. This chat, with up to 50 users, will need to have moderator tools and will be able to handle multiple messages coming in quickly. It would be a plus if it worked alongside WP’s existing login, but that is not detrimental. As a side note, we will only need one channel. Also, this chat would need to be embedded into one of my pages. I’m open to any and all suggestions that you may have. Thank you!