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Castrum Capital operates as a full-stack venture capital firm focused on the blockchain and cryptocurrency sectors. The company provides investment, mentorship, and strategic support to early-stage Web3 startups. It also offers Castrum Pad, a decentralized fundraising platform designed to facilitate the launch and growth of innovative Web3 projects.
Established in 2015, Castrum Capital was conceived to build the next-generation blockchain ecosystem. Semih Basaran is recognized as a founder, associated with Castrum Istanbul. The firm draws inspiration from ancient Roman principles, applying these foundational ideas to the developing infrastructure of the decentralized web.
Castrum Capital partners with crypto-related and Web3 startups seeking early-stage investment and strategic guidance. Its mission is to empower the development and adoption of decentralized technologies. The firm aims to foster innovation within the Web3 space, actively shaping its future through investment and ecosystem building.
Castrum Capital has 3 tracked investments across 3 companies. The latest tracked deal is $3.0M Seed in NEXST in March 2026.
| Date | Company | Round | Lead Investor(s) | Co-Investor(s) |
|---|---|---|---|---|
| Mar 11, 2026 | NEXST | $3.0M Seed | — | Becker Ventures, M2M Capital, TBV |
| Nov 2, 2025 | HEALTH | $2.5M Seed | Castrum Capital, Gemhead Capital | — |
| Jan 9, 2024 | Entangle Protocol | $4.0M Seed | — | 1NVST, Agnostic, BIG Brain Holdings, Blockhub DAO, Cogitent Ventures, Contango, Crypto Times Japan, CSP DAO, Faculty Group, Istari Vision, Launch Code Capital, Lbank Labs, MH Ventures, Nxgen, Offbeat, OWL Ventures, Seier Capital, Sharding Capital, Skynet Egld Capital, Solrdao, Terra Nova, Zephyrus Capital |
