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About
Justus Hammer is Co-Founder and CEO of Mad Paws, a company he co-founded and listed on the ASX before its sale to Rover.com, a Blackstone company. Born in Munich, Germany, he played professional basketball while completing a master's in Economics, and later earned a master's in Information Technology from Macquarie University in Australia. He founded the group-buying company Spreets in 2011 and sold it to Yahoo7 for $40 million within a year, and has since worked as an investor and advisor to numerous startups, including Vice Golf, which was acquired in 2023.
Founder at Mad Paws
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Frequently asked questions
- Who is Justus Hammer?
- Justus Hammer is Co-Founder and CEO of Mad Paws, a company he co-founded and listed on the ASX before its sale to Rover.com, a Blackstone company. Born in Munich, Germany, he played professional basketball while completing a master's in Economics, and later earned a master's in Information Technology from Macquarie University in Australia. He founded the group-buying company Spreets in 2011 and sold it to Yahoo7 for $40 million within a year, and has since worked as an investor and advisor to numerous startups, including Vice Golf, which was acquired in 2023.
- Where does Justus Hammer work?
- Justus Hammer is Founder of Mad Paws.
- What check size does Justus Hammer write?
- Justus Hammer typically writes checks of $20K – $200K.
- What companies did Justus Hammer found?
- Justus Hammer founded Mad Paws.
Founder mafias
Ludwig-Maximilians-Universität München mafia108
Also came through, then founded or led a company.
Macquarie University mafia31
Also came through, then founded or led a company.
Airtasker mafia4
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Mad Paws's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights

















