While I haven't given it a deep look, a free trial without CC details would have been nice! Regardless, building such a rich (Notion style) text editor isn't trivial. So, cheers to that.
I've released the website in Japan (which is my home country) earlier, so removing the registration process is bit tricky.
However, you can try major features such as card view or company page. Happy to hear some feedback for that as well ;)
Card view example: https://finboard.net/view/sec?view=a037684a58c448a590e3d3ec5...
Company page example: https://finboard.net/companies/TSLA