About OnSiren — threat intelligence for the world’s frontline
Threat intelligence
for the world’s frontline.
Police get briefed before every shift. Now security officers do too.
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THU APR 233:02 AM
Board & Team
Get on the network with the OnSiren app
Talk to the officers around you, raise an alert in one tap and start every shift with a brief from Alpha One.
Install the app
One app for every SIA licensed officer in the UK. Free on iPhone and Android.
- Scan the code or tap your storeTap your store below
- Verify your SIA licence
- Claim your call sign and go on air
Reserved a call sign before launch? Sign up with the same phone number and it is waiting for you.
