About Firlej Kastory
Firlej Kastory is a venture capital firm founded in 2019. It is primarily based out of Warsaw, Poland. As of Jul 2021, Firlej Kastory has invested in 3 companies. It primarily invests in Seed round in Poland based startups. Its investments are spread across a wide range of sectors from Enterprise Applications to Enterprise Infrastructure and FinTech. Most recently it participated in the $***** Series A round of Nethone Security Overall, Firlej Kastory portfolio has seen 1 acquisition, namely Nethone Security. A lot of funds co-invest with Firlej Kastory, with names like Atmos Ventures sharing a substantial percentage of its portfolio. Firlej Kastory has team of 2 people including 2 partners.Key Metrics
Team Members
Portfolio Count
Portfolio Sectors
Rounds of Entry
Seed & Series A
Portfolio Acquisitions
Firlej Kastory's List of All Investments
Firlej Kastory has a portfolio of 3 companies. Their most notable investments include Molecule.one and Nethone Security.Their portfolio spans across Poland and Estonia. They have invested in Enterprise Applications, Enterprise Infrastructure, FinTech and 4 other sectors, across stages such as Seed, Series A stages. Here is the list of all investments by Firlej Kastory:1. Molecule.one
Provider of AI-based software research for molecule drug designing and synthesis. The technology enables users to pick search criteria and proposes relevant reactions, scores them, and assembles them into full synthesis pathways for molecule synthesis.
Key facts about Molecule.one
- Founded Year: 2016
- Location: Warsaw (Poland)
- Stage: Seed
- Total Funding till date: $4.63M
- Employee Count: 25 as on Jul 01, 2024
- Investors: AME Cloud Ventures, Inventures and 10 Others
- Latest Funding Round: Seed, May 04, 2021, $*****
- Highlight: Editors' Pick
Provider of fraud prevention and detection solutions for online platforms. The company offers tools for user and risk analysis, device fingerprinting, and behavioral biometrics. It provides protection against account takeover, payment fraud, and promo abuse. The company delivers industry-tailored solutions for e-commerce, airlines, and financial services.
Key facts about Nethone Security
- Founded Year: 2016
- Location: Poland
- Stage: Acquired
- Total Funding till date: $7.7M
- Employee Count: 71 as on Jul 01, 2024
- Investors: 3VC Seed, Innovation Nest and 7 Others
- Latest Funding Round: Series A, Jul 15, 2021, $*****
- Highlight: Acquired
3. Blackwall
Provider of web security and traffic filtering solutions for hosting providers. The company’s system is engineered for web hosting providers to safeguard assets, data centers, and web clusters. Operating at the web traffic entry point, the system performs traffic inspection and filtering to neutralize malicious requests. It mitigates threats, including distributed denial-of-service attacks, brute-force attempts, and automated bot traffic.
Key facts about Blackwall
- Founded Year: 2019
- Location: Tallinn (Estonia)
- Stage: Series B
- Total Funding till date: $62.7M
- Employee Count: 96 as on Mar 31, 2026
- Investors: MMC Ventures, Dawn Capital and 7 Others
- Latest Funding Round: Series B, Mar 12, 2025, $*****
Firlej Kastory's Year-on-Year Investment Trends
Firlej Kastory has invested in 3 companies over the last 5 years, with an average of 0 new investment annually in the last 5 years. Its most recent first time investment was in Nethone Security.Firlej Kastory's Investments by Stage
Firlej Kastory has made 2 investments in Seed stage with an average round size of $4.63M and 1 investment in Series A stage with an average round size of $6.7M.Stage of entry | No. of Investments |
|---|---|
Seed | 2 |
Series A | 1 |
Note: We have considered here, only first round of investments
Firlej Kastory's Investments by Sector
Firlej Kastory has a diverse portfolio, with companies operating in the Enterprise Applications, Enterprise Infrastructure, Chemicals and Materials Tech, FinTech and HealthTech. Notably, it has invested in 3 Enterprise (B2B) companies, 3 Software companies, 3 Tech companies and 2 companies focusing on Saas.Sector | No. of Investments |
|---|---|
Enterprise Applications | 3 |
Enterprise Infrastructure | 2 |
Chemicals and Materials Tech | 1 |
FinTech | 1 |
HealthTech | 1 |
Others | 3 |
Note: We have considered here, only first round of investments
Firlej Kastory's Investments by Geography
Firlej Kastory has made most investments in Poland (2), followed by Estonia where it has made 1 investment.Country | No. of Investments |
|---|---|
Poland | 2 |
Estonia | 1 |
Note: We have considered here, only first round of investments
Firlej Kastory's recent investments
Firlej Kastory has not made any investment in 2026 so far.Here are the most recent investments by Firlej Kastory:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Jul 15, 2021 | Poland | Series A | 2086 | [+3] | |
May 04, 2021 | Poland | Seed | 7116 | [+6] | |
Feb 02, 2021 | Estonia | Seed | 4655 |
Acquired companies in Firlej Kastory's Portfolio
1 company from Firlej Kastory's portfolio has been acquired. The most recent acquisition were Nethone Security in Nov 2022 by Mangopay.Here are Firlej Kastory's portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Nov 29, 2022 | Jul 15, 2021 | Series A | 6503 |
Team profile of Firlej Kastory
Firlej Kastory has a team of 2 members including 2 Partners located in United Kingdom and Poland. Firlej Kastory's team does not sit on the board of any company as of now.Co-investors of Firlej Kastory
Over the past 5 years, 16 investors have co-invested in Firlej Kastory's portfolio companies. This includes funds and angels.
- Invested before Firlej Kastory: Sunfish Partners, Innovation Nest and 2 others have invested in rounds before Firlej Kastory. There is 1 company where Sunfish Partners has invested before Firlej Kastory and 1 company where Innovation Nest has invested before Firlej Kastory.
- Top Co-investors of Firlej Kastory: 8 investors entered a company along with Firlej Kastory. These include investors like Atmos Ventures (2 companies).
- Invested after Firlej Kastory: A total of 4 investors have invested in Firlej Kastory's portfolio after their investments. Top Investors include Dawn Capital (1 company), MMC Ventures (1 company) and Expeditions Fund (1 company).
Recent News related to Firlej Kastory
•
Polish Behavioral Biometrics Startup Closes $6.7 Million Series A Funding RoundFindBiometrics•Jul 17, 2021•Firlej Kastory, Innovation Nest, ARIA, Plug and Play Tech Center and 4 others
•
Molecule.one grows its drug synthesis AI platform with a $4.6M seed roundTechCrunch+•Jun 01, 2021•Molecule.one, Atmos Ventures, AME Cloud Ventures, Cherubic Ventures and 3 others
