# Sebastian Pietrowski

> Sebastian Pietrowski is a pre-seed investor at merXu backing SaaS and FinTech. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [merXu](https://shizune.co/investors/profile/merxu)
- Total investments: 1
- Last investment: Jun 2026
- Lead investor: 0%
- Last updated: Aug 2026

Sebastian Pietrowski is a pre-seed investor at merXu focused on SaaS and FinTech. Sebastian Pietrowski is the Co-Founder, Chief Technology Officer and Technology Executive of merXu.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 1 | 100% |
| FinTech | 1 | 100% |
| Business Process Automation (BPA) | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| sunbay.io | Sunbay automates invoice collections and order-to-cash operations for SMBs. It connects to your existing systems (like Xero, QuickBooks, or Fakturownia) and handles reminders, escalations, and collections automatically — without changing your tech stack. | $635K | Pre-Seed | Jun 11, 2026 |  |

1 of 1 investments shown.

## Co-investors
- [Kogito Ventures](https://shizune.co/investors/profile/kogito-ventures) — VC Fund, 1 deal together
- [S20 Fund](https://shizune.co/investors/profile/s20-team) — VC Fund, 1 deal together

## About merXu

VC Fund · Poznan, Poland

merXu is an online trading platform for companies from the CEE region operating in the B2B sector for small, medium-sized & large entities.

5 contacts available at merXu.

| Name | Title | Profile |
| --- | --- | --- |
| Piotr Nowjalis | CFO | https://shizune.co/investors/profile/piotr-nowjalis |
| Przemysław Budkowski | Co-Founder & Chief Executive Officer | https://shizune.co/investors/profile/przemys%C5%82aw-budkowski |
| Sebastian Pietrowski | Co-Founder, Chief Technology Officer & Technology Executive | https://shizune.co/investors/profile/sebastian-pietrowski |
| Tomasz Nowak | Co-Founder | https://shizune.co/investors/profile/tomasz-nowak-2d80 |
| Vaclav Liska | Area Manager | https://shizune.co/investors/profile/vaclav-liska |

## Similar investors

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### Similar stage
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### Similar country
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## Featured in investor lists
- [FinTech Angel Investors in Poland](https://shizune.co/investors/fintech-angel-investors-poland)

## FAQ

### What does Sebastian Pietrowski invest in?

Sebastian Pietrowski invests primarily in SaaS, FinTech and Business Process Automation (BPA) startups, most often at Pre-Seed stage. Most of the 1 investments tracked by Shizune back companies in Poland. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Sebastian Pietrowski last invest?

The most recent investment recorded for Sebastian Pietrowski closed in Jun 2026. 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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