For now it's completely free for the individual accounts (education accounts have a small fee: https://flat.io/edu/pricing). The individual ToS are available here: https://flat.io/legal/tos-individual

Just found the TOS while browsing. The link under "sign up" (leading to https://flat.io/legal) was the one I referred to as broken.

    (...) you grant us a worldwide, non-exclusive,
    royalty-free and perpetual licence to use,
    copy, reproduce, distribute, adapt, re-format,
    modify,  publish,  translate,  licence,  sub-licence,  
    and  exploit  the  User  Content anywhere and in any
    form for the purposes of providing our Service (...)

Yeah, I'm sticking to Lilypond, thanks.

@gnud Thanks for the link, we will fix this shortly. This part of the ToS applies to the public & shared content that can be accessible by everyone on the internet ;-)

No, it specifically applies to 'music, sounds, text or information that you make available or create ("User Content")'.

I understand that's not how you use it just now. But that's what it says.

As written, it applies to the "music, sounds, text or information that you make available or create whilst using the Service" and gives Flat a "worldwide, nonexclusive, royalty-free and perpetual licence to use, copy, reproduce, distribute, adapt, reformat, modify, publish, translate, licence, sub-licence, and exploit the User Content anywhere and in any form." [1]

I can see why artists might be a little concerned about this.

[1] https://flat.io/legal/individual-terms-of-service.pdf

We will update them in next few days / weeks to be more precise about private and non-shared content. This actually more apply to public content (e.g. you can see on "popular" pages).

Nice to hear, cool.