# Justus Hammer

> Justus Hammer is a seed investor at Mad Paws (Sydney) backing SaaS and Retail. See 7 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Mad Paws](https://shizune.co/investors/profile/mad-paws)
- Location: Sydney, Australia
- Total investments: 7
- Last investment: May 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/justus-hammer-6a871b8/
- X (Twitter): https://twitter.com/JustusHammer
- Website: https://x.com/JustusHammer

Justus Hammer is a seed investor at Mad Paws in Sydney focused on SaaS and Retail. Justus is a seasoned entrepreneur who has been working in the technology space for over a decade. First as a founder of Spreets and later as an investor and advisor to other startups such as Airtasker. His latest venture is Sellable with which he plans to revolutionise the real estate landscape in Australia.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $471k–$3M |
| Pre-Seed | $439k–$790k |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 2 | 29% |
| Retail | 2 | 29% |
| Artificial Intelligence | 2 | 29% |
| CRM | 1 | 14% |
| Pet | 1 | 14% |

21 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 57% |
| Pre-Seed | 2 | 29% |
| Series A | 1 | 14% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Australia | 5 | 71% |
| Germany | 1 | 14% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Brainfish | Brainfish is a trailblazing artificial intelligence (AI) company that specializes in delivering seamless customer experience (CX) solutions by harnessing the power of natural language processing (NLP). Our groundbreaking technology transforms the way customers and businesses interact globally, by providing instant answers to customer servicequeries in any language, and uplifting and enhancing customer support agents. | $2.6M | Seed | May 06, 2024 |  |
| Foodini | Foodini is an app that enables users to develop a customized profile of their dietary requirements and connects those with food allergies and intolerances with the restaurants and menu items that are most suitable for them. | $471K | Seed | Oct 11, 2022 |  |
| Foodini | Foodini is an app that enables users to develop a customized profile of their dietary requirements and connects those with food allergies and intolerances with the restaurants and menu items that are most suitable for them. | $438.5K | Pre-Seed | Oct 11, 2022 |  |
| STRAYZ | STRAYZ is the first social pet food brand with a big mission to improve the lives of all 680M street cats & dogs worldwide. By selling premium organic pet food as well as fair fashion for animal lovers the female founded start-up from Berlin collects donations for international animal welfare organizations using the buy one give one model.Thesocial business was founded in November 2020 by former colleagues Madeline Metzsch, Saskia te Kaat and Stefanie Zillessen. The passionate team raised more than 750k donations within the first 2 years. In addition to the social cause STRAYZ wants to disrupt the pet food industry. The founders believe that most pet food is more like junk food & not suitable for pets.STRAYZ is focusing on an omnichannel sales strategy in order to raise the maximum amount of donations. While building a D2C love brand with a strong community STRAYZ is also selling their pet food via retail in +2.400 POS. | $789.8K | Pre-Seed | Jun 21, 2022 |  |
| Upstreet | 'NextGen Loyalty Solution', 'FinTech', 'Share Trading', 'Marketing Solution', 'B2B', 'B2C', 'DtC', "Share Rewards" | $3M | Seed | Mar 22, 2022 |  |
| Hudled | Software is eating the world. Hudled makes sure it doesn’t eat your company.Our data-science approach enables you to leverage data to buy the right tools at the best price while engaging your people to get the most value from SaaS. We automatically find savings to apply in your stack and give you instant visibility into every tool, so you knowexactly how much you’re overpaying for software at any given moment. | $640K | Seed | Mar 15, 2021 |  |
| Mon Purse | In late 2013, our Founder Lana, realised that she simply spent far too many hours pounding the pavement, looking for the perfect handbag. Yet, nothing was perfect, and she wanted 'perfect'. Why pay premium prices if it isn't exactly what you want?She remembers sitting in her car in the Westfield Bondi Junction car park, andthinking that there simply had to be a better way. We realised, if it was possible for kids to build their own teddy bears, people to create their own custom Nike shoes, and fashionable women around the world to design their own premium women's shoes, there simply had to be a way to create high quality, luxury and bespoke handbags. | $3.1M | Series A | Jun 22, 2016 |  |

7 of 7 investments shown.

## Co-investors
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund, 3 deals together
- [Macdoch Ventures](https://shizune.co/investors/profile/macdoch-ventures) — VC Fund, 2 deals together
- [Artesian VC](https://shizune.co/investors/profile/artesian-capital-management) — VC Fund, 1 deal together
- [Black Nova Group](https://shizune.co/investors/profile/black-nova-group) — VC Fund, 1 deal together
- [Black Nova Venture Capital](https://shizune.co/investors/profile/black-nova-venture-capital) — VC Fund, 1 deal together
- [Black Sheep Capital](https://shizune.co/investors/profile/black-sheep-capital) — VC Fund, 1 deal together

## About Mad Paws

VC Fund · Sydney, Australia

Mad Paws is a Sydney-based start up that was created to fill in the ever growing need in the pet boarding market for affordable, and local pet accommodation while still maintaining the care, love, and attention pets received at high-end, expensive, pet boarding services.

5 contacts available at Mad Paws.

| Name | Title | Profile |
| --- | --- | --- |
| Jan Pacas | Co-founder | https://shizune.co/investors/profile/jan-pacas |
| Justus Hammer | Co-founder | https://shizune.co/investors/profile/justus-hammer |
| Alexis Soulopoulos | Co-Founder \| CEO New Business | https://shizune.co/investors/profile/alexis-soulopoulos |
| Bjorn Behrendt | Co-founder | https://shizune.co/investors/profile/bjorn-behrendt |
| Christopher Nheu | Product Manager | https://shizune.co/investors/profile/christopher-nheu |

## Similar investors

### Similar industry
- [SOSV](https://shizune.co/investors/profile/sosv) — VC Fund
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
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### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
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### Similar country
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
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- [Blackbird Ventures](https://shizune.co/investors/profile/blackbird-ventures-australia) — VC Fund

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## FAQ

### What does Justus Hammer invest in?

Justus Hammer invests primarily in SaaS, Retail and Artificial Intelligence startups, most often at Seed and Pre-Seed stage. Most of the 7 investments tracked by Shizune back companies in Australia. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Justus Hammer's check size?

Justus Hammer typically joins rounds of $471k–$3M at Seed and $439k–$790k at Pre-Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Justus Hammer participates in.

### When did Justus Hammer last invest?

The most recent investment recorded for Justus Hammer closed in May 2024. Shizune tracks 7 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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