Why can't I create a board outside of a team anymore?

Moving forward, all Trello boards will be placed into a team. For any new boards you create, you will be asked to select or create a team in which to put them. Soon you will be prompted to create teams in which to put your existing Trello boards.

Ok, but why?

Moving forward, new features in Trello are being shipped within the context of teams. 

Think of a Trello team workspace as your digital office, where collaboration is happening in real-time no matter where your teammates are located. Everyone can look at a board and understand what’s happening live. Everyone can look at a team and understand what work is getting done, how long it’s going to take, and who is responsible.

How do I make a Personal board now?

When you create the board, select “Private” as the visibility option. You have the flexibility to decide who has access to your content and who does not. You can also create a team on which you are the only member. 

If I’m on a team, can’t everyone see my boards?

Actually, no! Board privacy settings are still relevant here: meaning you are still able to set a board to Private, Team Visible, or Public. By setting a board to Private, only board members can access it. Free team admins cannot see or access private boards within that team. 

Members of the team are able to see and access all boards set to Team-Visible. But you still have the flexibility to decide who has access to your content and who does not. Boards within teams are able to be made private, and free team admins cannot access them. 

I’m not on a team. I just use Trello on my own. 

Good point. That’s why we have begun to transition from calling them “teams” to calling them “workspaces” in Trello. Whether you’re using Trello by yourself or collaboratively, you can create a workspace for all of your different endeavors. For example, if you’re a solopreneur or a freelancer, you can create a workspace for your different streams of work, or just have one workspace with boards for different projects. Guests can easily be added to teams, allowing them access to only specific boards.

How many boards can you have on a team?

Free workspaces can have up to 10 open boards (count does not include closed boards). Business Class and Enterprises can have unlimited boards in their workspaces. You are able to create multiple workspaces on the free plan.