# Daniel Ruben

> Daniel Ruben is a angel investor in Aachen backing Software and Search Engine. See 1 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: Aachen, Germany
- Total investments: 1
- Last investment: Aug 2021
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/danielruben

Daniel Ruben is a angel investor in Aachen focused on Software and Search Engine. Daniel Ruben - COO @ Custom Gateway

## Contacts

5 contacts available for Daniel Ruben: 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/daniel-ruben?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 1 | 100% |
| Search Engine | 1 | 100% |
| Machine Learning | 1 | 100% |
| Enterprise Software | 1 | 100% |
| Intelligent Systems | 1 | 100% |

10 industries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| amber | info@amberoad.aiambeRoad is developing an intelligent enterprise search engine to help employees to find all relevant documents easily and quickly by integrating all company internal data sources into one search engine. Our solution allows access to all company-wide files from anywhere. Even if you don't exactly know what you are lookingfor, our cutting-edge AI will know because of a range of features implemented in our software.No need to tag documents manually, all in milliseconds - only one search request away. |  | Angel | Aug 26, 2021 | https://amberoad.ai/ |

1 of 1 investments shown.

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## FAQ

### What does Daniel Ruben invest in?

Daniel Ruben invests primarily in Software, Search Engine and Machine Learning startups, most often at Angel 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 Daniel Ruben?

Public channels for Daniel Ruben 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 Daniel Ruben last invest?

The most recent investment recorded for Daniel Ruben closed in Aug 2021. 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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