Incidentally, just as a piece of quick feedback for clara.io:

Registering for a service is really expensive! I have to come up with a password, then file it in my password manager, hand out my email address to some unknown stranger, etc, etc. Mostly I won't bother unless there's some compelling reason to do so; when present with a registration form I'll usually just give up.

Since you have a browser-based product, having 'Try now!' button that starts it (with no backend storage!) and let me play with it would make me way more likely to actually sign up.

Agree ! this looks like amazing app , please provide demo speed access to the app without registering.

Nice way to work in that plug