# Dr. Ralf Köster

> Dr. Ralf Köster is a seed investor backing Banking and FinTech. See 1 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Total investments: 1
- Last investment: Jan 2018
- Lead investor: 0%
- Last updated: Aug 2026

Dr. Ralf Köster is a seed investor focused on Banking and FinTech. Dr. Ralf Köster

## Contacts

5 contacts available for Dr. Ralf Köster: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/dr-ralf-köster?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Banking | 1 | 100% |
| FinTech | 1 | 100% |
| Mobile Apps | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| AAZZUR | AAZZUR is a Fintech innovation that is changing banking. 10 years ago financial institutions built most of their own infrastructure, products, and services themselves. The new paradigm is to connect services. This is more flexible, cheaper, and more powerful. AAZZUR is a layer above the banks and fintech to facilitate the exchange of data,messages, and transactions. This is the promise of open banking. AAZZUR is an open banking platform that will revolutionize how data is monetized, customers are serviced, and how banks and fintech can be built. It’s a marketplace to provide the next wave of financial services. |  | Seed | Jan 22, 2018 |  |

1 of 1 investments shown.

## Co-investors
- [Techstars](https://shizune.co/investors/profile/techstars) — VC Fund, 1 deal together
- [Techstars Berlin Accelerator](https://shizune.co/investors/profile/techstars-berlin-accelerator) — VC Fund, 1 deal together

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## Featured in investor lists
- [Mobile Apps Angel Investors in Germany](https://shizune.co/investors/mobile-apps-angel-investors-germany)

## FAQ

### What does Dr. Ralf Köster invest in?

Dr. Ralf Köster invests primarily in Banking, FinTech and Mobile Apps startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Dr. Ralf Köster?

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 Dr. Ralf Köster last invest?

The most recent investment recorded for Dr. Ralf Köster closed in Jan 2018. Shizune tracks 1 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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