Hi @Prateek Khare,

Thanks for reaching out!

You can share the board with others and invite them as either member or as visitor. 

Invite as member:
If you invite them as members, you will need to add them to your paid seats. 

Invite as visitor:
If you invite them as visitors, you will need to share the board via a public link.

Learn more here: Sharing boards and inviting collaborators | Sharing with users outside your team

Hope this helps!