| Founded | 2012 |
|---|---|
| Closed | 2024 |
| Country | UK |
| Sector | Cybersecurity |
| Collapse type | Fire Sale |
| Founder | Zia Hayat |
Callsign
"Behavioral biometrics pioneer that Goldman backed but the market couldn't scale."
Distressed acquisition below last-round valuation
Key Events Timeline
Callsign, founded by Zia Hayat in London in 2012, raised over $100M from investors including Goldman Sachs and Telstra Ventures to build behavioral biometric-based fraud detection and digital identity orchestration.
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