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Geni is a website that allows families to collaboratively build their family tree. Family members can then use the tree to learn more about each other, share knowledge about common ancestors and relatives, and stay in touch with each other.
Privacy :
Your family network on Geni is private. We follow these rules:

• Only the people in your family tree can see your tree. No one outside your tree can see your tree.
• Only the people in your family tree can see your individual profile. No one outside your tree can see your profile.
• You can further restrict viewing of your profile information by changing your account settings.
• We will not provide any user's personal information to advertisers or third-parties. This includes your email address and the email addresses of those you invite.
• We will not spam you or your relatives or enable anyone else to do so. Geni may send service notifications that you can opt out of by changing your account settings.

User privacy is of the utmost importance to Geni. For more information please see Help section.

Try it.
Source : Geni official web-site.

Labels: Free, Services