Accel and PTB lead $35m series-A for Callsign

Allegis Capital and NightDragon Security also took part in the round, which will fund Callsign's international expansion strategy. In particular, Callsign is looking to expand its presence in the US and the Far East, according to a statement, and will be opening offices in New York City and California in the coming months.

The company will also invest in its staff, with a particular focus on its engineering, sales, marketing and business development teams.

As part of the deal, former FireFly and McAfee CEO David DeWalt will take on the role of vice chairperson at Callsign. Accel partner Harry Nelis, Allegis Capital managing director Bob Ackerman and PTB Ventures managing partner Dave Fields will also take seats on the board.

Company
Founded in 2012 and headquartered in London, Callsign is a developer of cyber security software that enables businesses to adopt flexible authentication approaches based on a user's risk profile. The company's client roster includes Lloyds Bank and Deutsche Bank.

People
Accel - Harry Nelis (partner).
Allegis Capital - Bob Ackerman (managing director).
PTB Ventures - Dave Fields (managing partner).
Callsign - Zia Hayat (founder, CEO).

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• Topics
• Expansion
• UK / Ireland
• Technology
• United Kingdom
• Venture
• Accel Ventures