Terms of Service

These terms govern your use of Signum. By signing in to Signum, installing the Signum browser extension, or installing the Signum Gmail add-on, you agree to them.

1. The service

Signum is engagement intelligence for outbound email. We track signals fired by recipients of emails you send, score the engagement, and surface the result in your dashboard. You retain ownership of every email you send and every recipient you track.

2. Acceptable use

You agree not to use Signum to send unsolicited bulk email, harass any recipient, or violate any applicable anti-spam law. You will respect recipient opt-outs, and you understand that Signum enforces them globally — once a recipient opts out, no Signum user can track that recipient again.

3. Plans and billing

The free plan covers your first 100 tracked emails per month. Paid plans are billed monthly and you can cancel any time; we'll keep your access until the end of the period you paid for. Annual plans give two months free.

4. Cancellation and data deletion

You can cancel your subscription from your settings at any time. You can permanently delete your workspace and all associated data from Settings → Data → Delete. We honor delete requests within 24 hours, after a brief grace period in case you change your mind.

5. Liability

Signum is provided "as is". We work hard to keep the service running and the data accurate, but we do not warrant uninterrupted operation or any specific outcome from your email tracking. Our maximum liability is capped at the amount you have paid us in the prior 12 months.

6. Changes to these terms

If we change these terms materially, we'll let you know by email at least 30 days before the change takes effect. Continued use of Signum after that date constitutes acceptance.

7. Contact

Questions? [email protected].