Upload your own suppression list

Your suppression list applies to your workspace only, on top of our global opt-out list.

Add people

• Dashboard: go to Settings, Suppression list. Paste emails or SHA-256 hashes, or upload a CSV or text file. We pick out every email address or 64-character hash and ignore other columns. Up to 100,000 people per upload.
• API: POST /v1/suppression with {"emails": [...]} and/or {"email_sha256": [...]}, up to 10,000 per request. Read-only keys can't add. GET /v1/suppression/count returns the size of your list.
• MCP: the add_to_suppression tool does the same.

Emails are trimmed and lowercased, then hashed with SHA-256. We store only the hashes. Dashboard uploads are hashed in your browser. A list holds up to 1,000,000 people.

What changes

• Listed people are never identified at person level on your sites. Their visits still count at company level.
• They're never sent to Slack, Teams, webhooks, your CRM, or Klaviyo, and never shown in your People list or CSV export.
• The API and MCP server never return or charge for them: you get 451 person_not_available with reason customer_suppressed.

Remove people

Owners and admins can download the list as hashes or remove the whole list in Settings, Suppression list. Members can see the count and download it. Removing single entries isn't available yet.