SC
About
Steffen Tiedemann Christensen is a co-founder and CTO of 23, a Danish, bootstrapped startup building product for visual sharing. At 23, Steffen has helped launch the personal photo sharing service [23](http://www.23hq.com) in 2005 and [23 Video](http://www.23video.com), an organizational video hosting service, in 2009.
Position in the VCSift Database
- • 2 investors at TwentyThree are tracked.
- • 200 investors hold the Co-founder & CTO role in VCSift. Steffen Christensen is one of them.
- • 666 investors are based in Copenhagen, Hovedstaden, Denmark.
Data sourced from 410,343 investor profiles. Updated July 2026.
Investment Focus
- Stages
- seed
- Location
- Copenhagen, Denmark
Contact Information
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