How much funding has Callsign raised?

Callsign has raised $38.75M in total. Its most recent round was a Venture Round in April 2021.

How many people work at Callsign?

About 275, down 1% over the last 30 days.

Who are Callsign's competitors?

Passbolt, SpyCloud, and CyberIAM are among the closest in IAM. The full competitive set, with overlap scoring, is in the platform.

Callsign

IAMLondon, United Kingdomfounded 2012private

Callsign is a cybersecurity company specializing in IAM, founded in 2012 and headquartered in London, United Kingdom. It has raised $38.75M in total funding, employs about 275 people, and is privately held.

Track Callsign in the platform Unlock this company data for free

updated Aug 22, 2026

The record

What Callsign did, dated.

Mar 2025Exec changeCallsign's chief commercial and strategy officer Amir Nooriala leaves
Jul 2021RecognitionCallsign invited to join the World Economic Forum's Global Innovators Community

selected events only — the full dated record (4 events since Mar 2021) lives in the platform

Momentum

25 out of 100.

Momentum blends hiring, funding, traffic and sentiment into one score, recomputed daily. The score is free; the pillars behind it unlock in the platform.

Growthlocked

Marketlocked

Financiallocked

Products

What Callsign sells.

In the platform

The other 440 data points.

Funding historyevery round, every lead investor
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security

Similar in IAM

FAQ

Common questions about Callsign.

How much funding has Callsign raised?: Callsign has raised $38.75M in total. Its most recent round was a Venture Round in April 2021.
How many people work at Callsign?: About 275, down 1% over the last 30 days.
Who are Callsign's competitors?: Passbolt, SpyCloud, and CyberIAM are among the closest in IAM. The full competitive set, with overlap scoring, is in the platform.