# Sharing and Privacy

## Public link

Every twin has a public URL:

`https://hi.speak-to.ai/your-slug`

Share it anywhere. Visitors can chat without an account unless you add a password.

## Password protection

On Profile, enable a password so only people with the code can open chat.

## Private knowledge

Mark specific documents or sections as **private**. Visitors must verify email in chat (and meet your allowlist if configured) before those passages can be used in answers.

Audience email here means **access and leads**, not outbound campaigns: the Twin does not email your list or send marketing blasts for you.

## Email invites

From Profile, invite people by email. They receive a link to your twin; optional private-knowledge access can be included.

## Contact capture

Enable **Show contact me** so interested visitors can leave their email. View leads under **Insights → Leads**.

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**Next:** [Plans and Billing](/guide/ai-twin-owners/plans-and-billing)