About Castrum Capital
Castrum Capital is a venture capital firm located in Istanbul, Turkey. As of Jun 2026, Castrum Capital is an active investor, having invested in 19 companies, with 5 new investments in the last 12 months. It primarily invests in Seed round in Singapore based startups. Its investments are spread across a wide range of sectors from High Tech to Blockchain Technology and FinTech. Most recently it participated in the $***** Series A round of CryptoPay AI A lot of funds co-invest with Castrum Capital, with names like TBV sharing a substantial percentage of its portfolio.Key Metrics
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Seed, Series A & 2 more
Portfolio Soonicorns
Deals in last 12 months
Castrum Capital's List of Top Investments
Castrum Capital has a portfolio of 19 companies. Their most notable investmentis in Serenity ShieldTheir portfolio spans across Singapore, United Kingdom, Spain and 5 more locations. They have invested in High Tech, Blockchain Technology, FinTech and 8 other sectors, across stages such as Seed, Series A and 2 more. Here is the list of top investments by Castrum Capital:
1. ChainGPT
AI model designed for blockchain and crypto. It offers blockchain and crypto information, a no code smart contract generator, smart contract auditor, code debugger, code to words, documentation creator, chart analysis and technical analysis, AML features, blockchain analytics, on-chain live data, source of news, and more.
Key facts about ChainGPT
- Founded Year: 2022
- Location: Dover (United States)
- Stage: Seed
- Total Funding till date: $3.7M
- Employee Count: 63 as on Jun 30, 2026
- Investors: XYZ Venture Capital, Alpha Capital and 5 Others
- Latest Funding Round: Seed, Apr 09, 2024, $*****
2. Metya
A web-enabled social platform utilizing AI-driven technology to facilitate connections and community-building. It is an AI-driven social platform that enables users to connect with others and explore various aspects of life. The platform utilizes blockchain technology to create unique digital assets, allowing users to express themselves in a decentralized manner.
Key facts about Metya
- Founded Year: 2024
- Location: Tortola (United Kingdom)
- Stage: Series C
- Total Funding till date: $50M
- Employee Count: 6 as on Jun 30, 2026
- Investors: Alpha Capital, Castrum Capital and 1 Other
- Latest Funding Round: Series C, Dec 15, 2025, $*****
3. Entangle
Developer of liquidity centric sub-layer powering the next generation of cross-chain DeFi applications. It provides users with an infrastructure that offers a blockchain network, distributed oracles, and a cross-chain DEX network. It allows developers to build, scale, and automate the technologies shaping the future of Web3—including AI, robotics, Real World Assets (RWA), and beyond. By providing the essential tools to unify decentralized ecosystems, It offers a critical toolkit for those building the most advanced and transformative products in tomorrow’s decentralized world.
Key facts about Entangle
- Founded Year: 2021
- Location: Dubai (United Arab Emirates)
- Stage: Seed
- Total Funding till date: $4M
- Employee Count: 26 as on Jun 30, 2026
- Investors: Owl Ventures, Big Brain Holdings and 21 Others
- Latest Funding Round: Seed, Mar 22, 2024, $*****
4. Kima Finance
Blockchain protocols for Defi applications. It is an open protocol that enables cross-chain and off-chain access to liquidity, data, financial primitives, and functionality for all decentralized applications.
Key facts about Kima Finance
- Founded Year: 2021
- Location: Tel Aviv (Israel)
- Stage: Seed
- Total Funding till date: $5M
- Employee Count: 35 as on May 31, 2026
- Investors: Outlier Ventures, Big Brain Holdings and 6 Others
- Latest Funding Round: Seed, Jun 12, 2024, $*****
5. PIF Nation
Provider a gaming platform for players to earn rewards. The platform allows players to earn rewards by completing quests and playing games. It offers a variety of games, including Ev.io, Pokemon unite, Rebelbots, Nyan Heroes, Gods Unchained, Guild of Guardians, Subway Surfers, and Apeiron .
Key facts about PIF Nation
- Founded Year: 2021
- Location: Singapore (Singapore)
- Stage: Series A
- Total Funding till date: $6M
- Employee Count: 17 as on Jun 30, 2026
- Investors: UOB, GSR Ventures and 20 Others
- Latest Funding Round: Series A, Jan 02, 2022, $*****
- Highlight: Editors' Pick
Castrum Capital's Year-on-Year Investment Trends
Castrum Capital has invested in 19 companies over the last 3 years, with an average of 4 new investments annually in the last 3 years. In 2025, it made 5 investments, while as of Jun 2026, it has made 3 investments in this year. Its most recent first time investment was in CryptoPay AI.Year | No. of Investments | ||
|---|---|---|---|
1st Round | Follow-on | Total | |
2026 (YTD) | 3 | 0 | 3 |
2025 | 5 | 0 | 5 |
2024 | 2 | 0 | 2 |
2023 | 1 | 0 | 1 |
Castrum Capital's Investments by Stage
Castrum Capital has made 6 investments in Seed stage with an average round size of $3.07M, 3 investments in Series A stage with an average round size of $10M, 1 investment in Series B stage with an average round size of $11M and 1 investment in Series C stage with an average round size of $50M.Stage of entry | No. of Investments |
|---|---|
Seed | 6 |
Series A | 3 |
Series B | 1 |
Series C | 1 |
Note: We have considered here, only first round of investments
Castrum Capital's Investments by Sector
Castrum Capital has a diverse portfolio, with companies operating in the Blockchain Technology, Blockchain - Industry Applications, FinTech, High Tech and Enterprise Applications. Notably, it has invested in 18 Tech companies, 14 Blockchain companies, 14 Consumer (B2C) companies and at least 10 companies focusing on Software.Sector | No. of Investments |
|---|---|
Blockchain Technology | 8 |
Blockchain - Industry Applications | 6 |
FinTech | 6 |
High Tech | 6 |
Enterprise Applications | 5 |
Others | 4 |
Note: We have considered here, only first round of investments
Castrum Capital's Investments by Geography
Castrum Capital has made most investments in Singapore (2), followed by Israel where it has made 1 investment.Country | No. of Investments |
|---|---|
Singapore | 2 |
Israel | 1 |
South Korea | 1 |
Spain | 1 |
Turkey | 1 |
Others | 3 |
Note: We have considered here, only first round of investments
Castrum Capital's recent investments
Castrum Capital has made 3 investments in 2026 so far. CryptoPay AI and Claw Intelligence are the latest among them.Here are the most recent investments by Castrum Capital:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Jun 11, 2026 | - | Series A | 3253 | [+2] | |
Apr 15, 2026 | Turkey | Seed | 6896 | ||
Mar 23, 2026 | United States | Series A | 5983 | [+3] | |
Dec 15, 2025 | United Kingdom | Series C | 9919 | ||
Oct 2025 | Singapore | Seed | 2972 |
Co-investors of Castrum Capital
Over the past 3 years, 48 investors have co-invested in Castrum Capital's portfolio companies. This includes funds and angels.
- Invested before Castrum Capital: Gate.io has invested before Castrum Capital.
- Top Co-investors of Castrum Capital: 46 investors entered a company along with Castrum Capital. These include investors like TBV (3 companies).
- Invested after Castrum Capital: Consensys (1 company) is the only investor which has invested in Castrum Capital's portfolio after their investments.
Recent News related to Castrum Capital
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AIPayWithCrypto Completes $10 Million Funding Round with Multiple Institutional InvestorsCoinTime•Jun 11, 2026•Titan Ventures, Castrum Capital, Adaverse, Animoca Brands and 2 others
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Metya Secures $50M to Expand Global Asset ServicesVentureburn•Dec 15, 2025•Alpha Capital Group, Metya, Castrum Capital, M2M Capital and 1 other
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LAB Closes $1.5M Community Round, $LAB Token En RouteCrowdfund Insider•Oct 03, 2025•Cypher Capital, Legion, Oak Grove Ventures, Castrum Capital and 13 others
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Openverse Network Secures $11 Million in Strategic FundingPANews•May 12, 2025•Asva Ventures, Castrum Capital, Duckdao, Openverse and 1 other
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Bluwhale raises $100M to build a dedicated ‘intelligence layer’ for decentralized AI agentsSiliconAngle•Jan 28, 2025•Bluwhale, CoinTelegraph, SwissBorg, Awaken Finance and 22 others
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SONEX Closes Seed Round for DeFi Trading in Soneium EcosystemBitcoin Ethereum News•Jan 21, 2025•SONEX, Outliers, Baboon, Taisu and 26 others
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Serenity Shield Enters Eurasia with Investment from Castrum CapitalCryptopotato•Dec 21, 2023•Serenity Shield, Castrum Capital
