Do you offer a free sandbox/development account?
Yes, all plans include a forever free development mode. You get credentials for using TalkJS in production by “going live” – this is the process of entering credit card information and going through checkout. Once you do that, you have two fully separate apps in the TalkJS dashboard, with two fully separate groups of users, conversations, and settings. You can then use the test app for development and testing, and the live app for your users.