# Tangent Line Ventures

> Tangent Line Ventures is a VC fund backing Artificial Intelligence and Mining. See 6 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Warsaw, Poland
- Total investments: 6
- Last investment: Dec 2023
- Lead investor: 17%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/tangent-line-capital-fund/
- Website: https://tangentline.ventures/

Tangent Line Ventures is a venture capital firm that provides capital and business partners for industrial technology startups.

## Contacts

5 contacts available for Tangent Line Ventures. Shizune tracks 2 team members at Tangent Line Ventures. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/tangent-line-ventures?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1.5M–$5.4M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 2 | 33% |
| Mining | 1 | 17% |
| Retail | 1 | 17% |
| Medical | 1 | 17% |
| Hospital | 1 | 17% |

17 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 5 | 83% |
| Venture - Series Unknown | 1 | 17% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Poland | 2 | 33% |
| France | 1 | 17% |
| Germany | 1 | 17% |
| Indonesia | 1 | 17% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Monika Borowiecka | Managing Partner VC | 1 | https://shizune.co/investors/profile/monika-borowiecka |
| Piotr Pietrzak | Founding Partner | 3 | https://shizune.co/investors/profile/piotr-pietrzak-0b77 |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| MIM Fertility | MIM Fertility help fertility professionals improve patient outcomes and increase clinic efficiency by artificial intelligence to address infertility holistically. | $2M | Seed | Dec 04, 2023 |  |
| Envirly | Envirly is a Polish technology company that offers an innovative platform for managing sustainable development, and the carbon footprint of organizations and products. | $1.5M | Seed | Nov 28, 2023 |  |
| MagREEsource | MagREEsource is to link the circular economy by providing a green metallurgical solution through short loop recycling of NdFeB magnets to stabilise and diversify the supply of Rare Earth permanent magnets. | $5.4M | Seed | Jan 10, 2023 |  |
| Cleangang | Cleangang is an online store that sells a wide range of cleaning products and accessories to its customers. |  | Seed | Jan 01, 2023 |  |
| ReliaSol (Reliability Solutions) | Reliability Solutions was established by a group of young scientists from AGH UST in Krakow – outstanding Polish technical university. Our mission is to transfer knowledge and novel solutions in data analysis from science to business. By the usage of cutting-edge scientific results in data science, we are able to predict machinery failures whatresults in huge financial benefits and safety increase to the industry. Due to cooperation with NVIDIA we use deep learning algorithms powered by GPUs to make better insight into data and highly improve the meaning of Predictive Maintenance. After positive feedback in Polish market we decided to leverage our transatlantic connection with US. | $2.2M | Venture - Series Unknown | Apr 06, 2022 |  |
| Re-Zip | RE-ZIP is a circular packaging solution for e-commerce businesses. Online customers worldwide can save up to 80% on CO2 emissions by (re)using packaging many times, as opposed to single-use packaging. |  | Seed | Jan 01, 2022 |  |

6 of 6 investments shown.

## Co-investors
- [BNP Paribas](https://shizune.co/investors/profile/bank-bg%C5%BC-bnp-paribas) — VC Fund, 2 deals together
- [Aligo Venture Capital](https://shizune.co/investors/profile/aligo-venture-capital) — VC Fund, 1 deal together
- [Angels 4 Impact](https://shizune.co/investors/profile/angels-4-impact) — VC Fund, 1 deal together
- [Qemetica Ventures (Formerly Ciech Ventures)](https://shizune.co/investors/profile/ciech-ventures) — VC Fund, 1 deal together
- [EIT RawMaterials](https://shizune.co/investors/profile/eit-rawmaterials) — VC Fund, 1 deal together
- [European Union](https://shizune.co/investors/profile/european-union) — VC Fund, 1 deal together

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## FAQ

### What does Tangent Line Ventures invest in?

Tangent Line Ventures invests primarily in Artificial Intelligence, Mining and Retail startups, most often at Seed and Venture - Series Unknown stage. Most of the 6 investments tracked by Shizune back companies in Poland. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Tangent Line Ventures's check size?

Tangent Line Ventures typically joins rounds of $1.5M–$5.4M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Tangent Line Ventures participates in.

### How do I contact Tangent Line Ventures?

Public channels for Tangent Line Ventures include LinkedIn and the website linked on this profile. 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.

### Who are the partners at Tangent Line Ventures?

The team at Tangent Line Ventures includes Monika Borowiecka (Managing Partner VC) and Piotr Pietrzak (Founding Partner). The Team section lists each member with their title, investment count and links.

### 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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