Is it free for government institutions?

[Rafael Mascayano]

I'm chief of it public health department, and we are using Bitbucket for only four of project unit. It'll still being free if we add more than 5 developer if I'm non commercial organization?

[Nic Brough -Adaptavist-]

No. 

Secular charities and open source organisations can get free licences.  Academics can get a big discount.  That applies for the Atlassian stack in general.  Bitbucket Cloud is slightly different in that it also allows for up to 5 users of private repositories for free for any organisation.  But you'll need to pay if you fall outside of those rules.