About Signum

Signum is engagement intelligence for outbound email. We built it because every existing tracker had the same flaw: a tracker that calls an Apple MPP prefetch an "open" is not a tracker — it's a fiction generator. So we started over.

What we believe

Email is the most important communication tool people have for work, and the data around it is the worst-quality data in the modern stack. We believe that's solvable, and that solving it makes every other tool that depends on engagement data better — CRMs, follow-up sequencers, AI assistants, all of them.

How we got here

Built by a small global team. We ship publicly, we listen to design partners, and we treat both senders and recipients as customers. Our incentives are aligned with both.

Contact

Email [email protected] or find us on GitHub.