Personal.
Trust should belong to a person, not to another account or device.
Yours4SI / Company
Most technology companies begin with a product and hope a brand emerges. 4SI began with one human value: trust.

TRUST MADE PHYSICAL · PHOENIX, ARIZONA
01 / Our purpose
We believe trust should be something people can understand, choose and carry into daily life.
Technology is not the brand. It is the proof — quietly demonstrating why a person, product or action can be trusted.
Trust, in real life



02 / What the name should mean
Trust should belong to a person, not to another account or device.
YoursTrust should have a form you can see, hold and understand.
TangibleImportant products should feel considered enough to become part of life.
HumanTrust should outlast trends, interfaces and the technology of the moment.
Long-term03 / The beginning
It began with a question.
The answer became physical.
The result is 4SI.
04 / Our first expressions
Presence Key makes trust personal. Presence Layer extends it to the objects and products that matter. Together, they begin a simpler relationship between people and the world around them.

05 / Founder-led
Niclas Braun founded 4SI after examining how people can remain in control as digital systems become more capable. 4SI is the practical answer: a brand and product family designed to make trust physical.
Meet the founder ↗
Concept / 4SI Center
We imagine a place where identity can be verified, a Presence Key becomes yours and trust leaves the screen to become part of everyday life.
ONE HUMAN. ONE KEY.06 / Where we are building
For Safety Group Inc. is based in Phoenix, Arizona. 4SI brings European origins and an American operating base to a brand created for everyday life across borders.


For Safety Group Inc. (4SI)
11201 North Tatum Boulevard · Suite 300 PMB #365 · Phoenix, Arizona 85028 · United States4SI is a brand of For Safety Group Inc.