About us
We make IoT that works. We put things online to monitor and control if they break, need service or someone has to be alarmed.
COSESY=COmmunicating SEcure SYstems. This is our name from before IoT was born.
Our team, experience and turn-key toolbox is used in 50+ products and by more than 20.000 people.
The FireFender products are the results of a Scandinavian co-operation. Cosesy A/S in Denmark have made IoT security products since 2011 and Dafo Brand AB in Sweden has 100 years of history as one of the largest suppliers of fire-protection in the Nordics. We have a simple mission: more safety, less costs. Click here to view our code of conduct.

Get in touch
We constantly improve our technologies with new features, services and hardware and appreciate innovation and ideas from our partners. We strive to have long-lasting collaborations.
COSESY is placed in Aarhus, Denmark. We would love to hear from you, so please send your contact information or call us at +45 61 60 12 11.
COSESY A/S - Viengevej 100 - Risskov - Denmark