What is Callsign?
Founded in 2012 and headquartered in Palo Alto, California, Callsign operates at the intersection of cybersecurity and user experience. The company specializes in identification via web, mobile, and physical interaction channels, utilizing sophisticated analytics to ensure secure access to digital services. Unlike traditional security measures that often introduce latency or user friction, Callsign leverages behavioral biometrics and contextual data to verify identities in real-time. This methodology allows enterprises to maintain high-security standards while simultaneously streamlining the authentication process for end-users, effectively mitigating the risks associated with credential theft and unauthorized access in an increasingly mobile-first digital economy.
How much funding has Callsign raised?
Callsign has raised a total of $38.8M across 3 funding rounds:
Other Financing Round
$250K
Other Financing Round
$3.5M
Series A
$35M
Other Financing Round (2013): $250K with participation from Qualcomm Ventures
Other Financing Round (2014): $3.5M led by Terry Eger
Series A (2017): $35M, investors not publicly disclosed
Key Investors in Callsign
Qualcomm Ventures
Qualcomm Ventures is the investment arm of a global technology leader specializing in semiconductor technologies and wireless communication solutions, focusing on companies that drive innovation in connected devices and intelligent computing.
Terry Eger
An individual investor providing strategic capital to support the early-stage development and market expansion of innovative software enterprises.
Undisclosed Investor
Undisclosed investor participating in the funding round.
What's next for Callsign?
With the recent influx of capital, Callsign is well-positioned to scale its operations and deepen its penetration into the enterprise security market. The strategic focus will likely center on expanding its global footprint and enhancing its machine learning models to combat increasingly complex cyber threats. As organizations continue to migrate toward zero-trust architectures, Callsign's ability to provide transparent, continuous authentication will be a key differentiator. Future growth will likely involve further integration with cloud-native ecosystems and the development of advanced identity verification tools designed to meet the rigorous compliance requirements of the financial services and healthcare sectors.
See full Callsign company page
