Martin Ostermayer
Angel Investor · at Capital Square
Martin Ostermayer is a seed investor at Capital Square focused on Education and Apps. CEO of Shortcut Ventures GmbH in Hamburg, Germany.Martin Ostermayer is one of the CEOs of the venture capital firm, Shortcut Ventures, located in Hamburg, Germany. After graduating in Business Administration from the University of Hamburg, Ostermayer received his MBA from the University of San Francisco in 1998, majoring in telecommunicationsand business strategy.In 1999, he set up handy.de, which became Europe’s largest provider of mobile entertainment services with business partners Thorsten Rehling and Dirk Freise. They also created blau.de, the first independent wireless service discounter in Germany, in 2005. They led the company until 2011.
- Total investments:
- 10
- Last investment:
- Lead investor:
- 10%
Last updated:
For AI agents: llms.txt
Industries Martin Ostermayer invests in
Stages Martin Ostermayer invests in
Countries Martin Ostermayer invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.1M–$3.3M
- Series A
- $4.8M–$5.9M
Investment Focus
Industry
- Education 3 (30%)
- Apps 2 (20%)
- Software 2 (20%)
- Media and Entertainment 2 (20%)
- TV 1 (10%)
Stage
- Seed 6 (60%)
- Pre-Seed 2 (20%)
- Series A 2 (20%)
Country
- Germany 7 (70%)
- Spain 1 (10%)
- Finland 1 (10%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Meet RedMimicry, a cybersecurity solution for automated breach and attack emulation built for consulting firms. This innovative software is geared toward testing security measures, verifying network-wide protection, response capabilities and visibility.RedMimicry is a novel solution, offering new and effective approach to purple teaming. Itprovides a continuously updated feed of malware emulation scenarios allowing customers to emulate up-to-date endpoint infection chains and Tactics, Techniques, and Procedures (TTPs) of real threat actors at the press of a button. | Seed / Aug 21, 2025 | ||
| AUDAVIS is developing the most innovative approach that will revolutionize auditing. With data-driven full automation by AUDAVIS and a new AI-based approach, every financial statement becomes a breeze with unprecedented efficiency. | $1.1M / Seed / Jan 15, 2025 | ||
| Graswald engages in the creation of natural and digital 3D worlds for the entertainment industry. | $3.3M / Seed / Mar 20, 2024 | ||
| We make coaching 100 times cheaper through chatbot technology, to drive organizational change. We also collect data to be able to give your organization feedback on systemic bottlenecks and blind spots. Trusted by companies like SAP, Universal Pictures, and KONE. A free trial is available on our website. | $680K / Pre-Seed / Mar 07, 2023 | ||
| heyData is a legal tech company. HeyData offers a digitized data protection officer for companies. | $3.3M / Seed / Sep 13, 2022 | ||
| Hyrise Academy is an online learning site for careers in tech sales. | Pre-Seed / May 06, 2021 | ||
| Sdui is the solution for mobile communication in schools. With amazingly easy features for messaging, timetables and a wide range of third party integrations, the app digitizes processes and reduces administrative effort. Within two years, Sdui has reached hundreds of institutions and grown a serious reputation in the educational market. | $5.9M / Series A / Mar 09, 2021 | ||
| Sdui is the solution for mobile communication in schools. With amazingly easy features for messaging, timetables and a wide range of third party integrations, the app digitizes processes and reduces administrative effort. Within two years, Sdui has reached hundreds of institutions and grown a serious reputation in the educational market. | $2.2M / Seed / Feb 06, 2020 | ||
| Mediakraft Networks is an online television network in Europe. It offers programs about young people, entertainment, beauty, sports, and latest breaking news. Mediakraft Networks was founded in 2011 and is headquartered in Cologne, Germany. | Seed / Dec 17, 2012 | ||
| UppTalk (formerly Yuilop) is a cloud-based communications app that enables users to call, text, group chat, and share multimedia for free. It operates over Wifi, 3G, 4G and LTE. The app supports Android, iOS, Windows, and Kindle devices. It can be downloaded for free and used to contact anyone with a mobile or landline phone, including non-UppTalkusers.Every user gets free credit upon signing up and they can earn more by inviting friends, watching videos, or checking out UppTalk’s available promotions.UppTalk was launched in December 2010 by Jochen Doppelhammer and is operated from Barcelona, Spain. | $4.8M / Series A / May 23, 2012 |
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FAQ
What does Martin Ostermayer invest in?
Martin Ostermayer invests primarily in Education, Apps and Software startups, most often at Seed and Pre-Seed stage. Most of the 10 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Martin Ostermayer's check size?
Martin Ostermayer typically joins rounds of $1.1M–$3.3M at Seed and $4.8M–$5.9M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Martin Ostermayer participates in.
How do I contact Martin Ostermayer?
Public channels for Martin Ostermayer include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Martin Ostermayer last invest?
The most recent investment recorded for Martin Ostermayer closed in Aug 2025. Shizune tracks 10 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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