German entrepreneur Christian Reber sold his to-do list app Wunderlist to Microsoft in 2015 for a sum that was reported to be between $100 million and $200 million only to watch the U.S. tech giant shut it down four years later.

Now he’s just raised funding for a follow-on app called Superlist, which he’s set up with four other entrepreneurs including two of the other Wunderlist co-founders.

Reber told CNBC earlier this year that the Wunderlist acquisition left him feeling “really unhappy” and annoyed. One of the main reasons Reber was so frustrated when Microsoft shut down Wunderlist is because he felt that the app never became the product he wanted to build.

He didn’t give up there though. In 2021, he launched Superlist, which he describes as the “unofficial successor to Wunderlist” and a “passion project.”

Superlist is a task and project management app that aims to help people collaborate in a hybrid-working world. It’s currently still in the second phase of its release life cycle.

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