user281: I have seen this mentioned a few times and have no idea what it is.
I get the impression that it is referring to the combination of the Cardano Foundation, IO Global and Emurgo.

user934: These are synonyms. Stiftung is German for foundation. The Cardano Foundation is located in Zug, Switzerland - a German-speaking part of the country.
The twitter handle of the (now verified) Cardano Foundation is CardanoStiftung: https://twitter.com/CardanoStiftung.

281: <p>I have seen this mentioned a few times and have no idea what it is.
I get the impression that it is referring to the combination of the Cardano Foundation, IO Global and Emurgo.</p>
 934: <p>These are synonyms. Stiftung is German for foundation. The Cardano Foundation is located in Zug, Switzerland - a German-speaking part of the country.</p>
<p>The twitter handle of the (now verified) Cardano Foundation is CardanoStiftung: <a href="https://twitter.com/CardanoStiftung" rel="nofollow noreferrer">https://twitter.com/CardanoStiftung</a>.</p>
