# Honza Široký

> Honza Široký is a pre-seed investor in Prague backing Health Care and Space Travel. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Location: Prague, Czech Republic
- Total investments: 2
- Last investment: Oct 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/honza-siroky/
- X (Twitter): https://twitter.com/sir_honza
- Website: https://x.com/sir_honza

Honza Široký is a pre-seed investor in Prague focused on Health Care and Space Travel. I started with web development at the age of 15, working on various commercial and school projects while exploring other areas of software engineering and computer science. I joined Mews as one of the first two developers set to build the product. Ten years later, as a CTO, I was leaving a growing team of 170 engineers and a series C company withUSD 100M+ ARR. Currently, I'm involved in CzechFounders VC as a limited partner and an investment committee member. Besides that, I'm taking my first steps as an angel investor, enjoy mentoring of early stage startups, and keep pursuing my lifelong passion for sports.

## Round sizes

| Stage | Round size |
| --- | --- |
| Pre-Seed | $878k–$1.9M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 1 | 50% |
| Space Travel | 1 | 50% |
| Health Diagnostics | 1 | 50% |
| Artificial Intelligence | 1 | 50% |
| Satellite Communication | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Zaitra | Zaitra reduces data transmission costs while also providing spaceship onboard and artificial intelligence services. | $1.9M | Pre-Seed | Oct 08, 2024 |  |
| Macromo | Macromo Engine will evaluate data from millions of wearables, genetic tests, and lab tests. We strive for a more comprehensive view rather than separating these data sets, which leads to inadequate prevention and delayed treatments. Our goal is to help healthcare move away from a reactive disease treatment approach and toward one that focuses ontargeted prevention and self-care. | $877.9K | Pre-Seed | Sep 07, 2023 |  |

2 of 2 investments shown.

## Co-investors
- [Czech Founders VC](https://shizune.co/investors/profile/czech-founders-vc) — VC Fund, 1 deal together
- [European Space Agency](https://shizune.co/investors/profile/european-space-agency-f580) — VC Fund, 1 deal together
- [LUMUS Investment Collective](https://shizune.co/investors/profile/lumus-investment-collective) — VC Fund, 1 deal together
- [Sunfish Partners](https://shizune.co/investors/profile/sunfish-partners) — VC Fund, 1 deal together
- [Technology Agency of Czech Republic](https://shizune.co/investors/profile/technology-agency-of-czech-republic) — VC Fund, 1 deal together

## Similar investors

### Similar industry
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### Similar stage
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### Similar country
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## Featured in investor lists
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## FAQ

### What does Honza Široký invest in?

Honza Široký invests primarily in Health Care, Space Travel and Health Diagnostics startups, most often at Pre-Seed stage. Most of the 2 investments tracked by Shizune back companies in Czech Republic. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Honza Široký's check size?

Honza Široký typically joins rounds of $878k–$1.9M 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 Honza Široký participates in.

### When did Honza Široký last invest?

The most recent investment recorded for Honza Široký closed in Oct 2024. Shizune tracks 2 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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