For the client your will need a config.js file which contains a json object for STUN/TURN server. I will not explain in details what is this for in this article but it is necessary to help two clients to exchange their public IP Adresses. The gist above is not correct for security reasons but you can create your own config object at xirsys. - Source: dev.to / over 2 years ago

I recently started using WebRTC for my final year project and just discovered xirsys.com, which happens to be the only TURN service provider I could use cuz of their 500 MBs free tier. I know this isn't even enough for testing purposes and anything more will come at costs. So, I'm considering running coturn on a VPS at some cheap cloud platform somewhere, but don't know the pros and cons of either of these choices. Source: over 2 years ago

Just found xirsys.com. They provide free 500 MBs per month bandwidth. Which should be enough for testing purposes so far :). Source: over 2 years ago

What about Xirsys? Great service and cheaper than Twilio. https://xirsys.com/. Source: almost 3 years ago

Marvelapp.com — Design, prototyping, and collaboration, free plan limited to one user and project. - Source: dev.to / 4 months ago

At this stage your main goal should be to prototype it and test it with people to validate the idea. Or at the very least have something people can look at and respond to. Don’t worry about building a coded and working version yet. Start with a clickable prototype which can be built using design tools. Most people use Figma these days but if you’re just starting out you could use something like Marvel, which is... Source: about 1 year ago

Marvelapp.com — Design, prototyping and collaboration, free plan limited to one user and one project. - Source: dev.to / over 1 year ago

Hi, I am doing research on some of the user testing tools out there like lookback.io, Marvelapp.com, maze.design, usabilityhub.com, userbrain.net, usertesting.com, userzoom.com. I would like to know about your experience. Source: over 1 year ago

As far as I can remember, I saw https://marvelapp.com/ doing it to add a prototype to the homescreen. Source: about 2 years ago