Justus Hammer is an angel investor and operator angel based in Sydney, New South Wales, Australia with 11 known investments: Airtasker, Upstreet, Brainfish, Foodini, STRAYZ, Hudled, Mon Purse, Docbook, GemJoli.com.au, Tempurer and Vice Golf.
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Investment focus
- Stage
- Seed
Contacts
Justus Hammer portfolio companies (11)
- Airtasker
- Upstreet
- Brainfish
- Foodini
- STRAYZ
- Hudled
- Mon Purse
- Docbook
- GemJoli.com.au
- Tempurer
- Vice Golf
Investor Profile
Founders in the listed sectors Commerce, Consumer, FinTech and Food, and focus areas Consumer Services, Customer Service, E-Commerce and Loyalty Programs will recognize the pattern in this portfolio.
Justus Hammer appears in Seed rounds across the known deals.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is Justus Hammer?
Justus Hammer is an angel investor and operator angel based in Sydney, New South Wales, Australia with 11 known investments on file, among them Airtasker, Upstreet and Brainfish. The sections above list the sectors and stages attached to that record.
What does Justus Hammer invest in?
Listed sectors include Commerce, Consumer, FinTech and Food; listed focus areas include Consumer Services, Customer Service, E-Commerce and Loyalty Programs. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Justus Hammer invest at?
The known deals of Justus Hammer include Seed rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
How do I contact Justus Hammer?
An email address, a phone number and a LinkedIn page are on file for Justus Hammer. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal