Callsign
Online autentication service
Callsign has raised €30M across 1 funding round from 4 investors, most recently a Series A round in Aug 2017. Based in UK; active in Software. Data as of 4 Nov 2026.
Total raised
€30M
€29,845,655
Funding rounds
1
Investors
4
distinct backers
Active since
2017-08
latest 2017-08
Funding by year
EUR raised per yearCallsign — funding by year — interactive chart.
Data table
| Callsign — funding by year | |
|---|---|
| 2017 | €30M |
Signals
High confidenceRaise-next likelihood8
base rate 44% for Series A
- ▼ Dormant (no round in 3+ cohort gaps)
- ▼ Low backer re-investment
Timing: dormant vs cohort gap · momentum unknown. Funding-only estimates, not predictions and not investment advice — see signals.
Funding rounds
1 round| Date | Stage | Amount | Investors | |
|---|---|---|---|---|
| 2017-08-01 | Series A | €30M | Accel,Allegis Capital,NightDragon Security,PTB Ventures | View deal → |
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