Castrum Capital
Venture capitalIstanbul Β· Pre-SeedβSeed
Investment thesis
Castrum Capital is a crypto-native venture firm that backs early-stage crypto and blockchain projects from day one. Its investment decisions are grounded in detailed research, including deep analysis of tokenomics, technical architecture, and product design. Beyond capital, the firm operates as an interconnected series of components, each with a dedicated team, offering technical, marketing, community, and partnership support to help projects grow. It leverages extensive connections across the crypto industry and enterprises worldwide, aiming to not only select strong projects but also help them reach their full potential for long-term gains.
Source: firm website, verified Aug 7, 2026.
What they invest in
from 54 of 121 portfolio companiesCrypto & Web3 Γ43Media & Entertainment Γ15AI & Machine Learning Γ13Fintech Γ12Gaming Γ9Data & Infrastructure Γ7Consumer Γ5Cybersecurity Γ4
HQs:CanadaΓ3TΓΌrkiyeΓ2United Arab EmiratesΓ1AustraliaΓ1GermanyΓ1Hong KongΓ1
Investments Β· 121 tracked
founders shown can be your intro pathAn affiliate comparison and review site that ranks offshore online casinos ("pokies") for real-money play targeting Australian players, using a public 7-criteria scoring rubric.
ConsumerGamingMedia & Entertainment
Altcoinist is a crypto trading tool that uses smart order routing and algorithmic order splitting across 100+ DEXs and private market makers to get better trade execution and fills.
Crypto & Web3Fintech
BLOCK3000 is an online crypto conference and launchpad where blockchain startups compete in a startup battle and attendees can vote for and invest in winning projects.
Crypto & Web3Media & Entertainment
Castrum Work is a marketing agency serving crypto and Web3 projects, offering full-stack services such as branding, media, and go-to-market support.
Crypto & Web3Marketing Tech
Castrum Social is a social media marketing agency that connects crypto project owners with local influencers, KOLs, and community moderators (on YouTube, Twitch, Telegram, Discord, Instagram, and Twitter) to run localized influencer marketing campaigns.
Crypto & Web3Marketing TechMarketplaces
Castrum Academy connects university student societies with blockchain and cryptocurrency events, covering event costs through partners to educate students on blockchain technology and Web 3.0.
Crypto & Web3EdTech
Castrum is a blockchain ecosystem based in Istanbul spanning several ventures, including a venture capital arm, a launchpad, a crypto growth agency, a game guild, an influencer agency, and an academy.
Crypto & Web3GamingMedia & EntertainmentIstanbul, TR
Cookie3 provides analytics and intelligence tools for cryptocurrency projects, combining on-chain blockchain data with off-chain social media metrics to help projects optimize marketing campaigns, assess key opinion leaders, and distribute tokens to engaged communities.
Crypto & Web3Data & InfrastructureMarketing Tech
Cosmoverse is an institutional digital asset summit that brings together regulators, central banks, blockchain and fintech leaders, and builders for policy dialogue, dealflow, and infrastructure-focused sessions.
Crypto & Web3FintechMedia & EntertainmentHong Kong, HK
DAOKraft is an AI-powered governance platform that turns DAO proposals into structured, executable governance outcomes and provides analytics for decision-making.
AI & Machine LearningCrypto & Web3SaaS
Datai is a decentralized data infrastructure platform that indexes and enriches real-time blockchain data from multiple chains, using in-house machine learning to label and classify smart contracts and deliver structured, AI-ready on-chain intelligence via APIs.
AI & Machine LearningCrypto & Web3Data & Infrastructure
DATS is a DePIN and blockchain-based cybersecurity platform that lets users contribute their computers' idle resources (bandwidth and CPU) to power distributed security audit and vulnerability detection operations in exchange for tokens.
CleantechCrypto & Web3Cybersecurity
A Turkish-language content platform about blockchain technology, offering guides, project overviews, and educational resources for people interested in cryptocurrency.
Crypto & Web3Media & Entertainment
Dtec is developing a voice-operated app for the automobile market that lets drivers command hardware and IoT devices while driving.
AI & Machine LearningIoTMobility & Transportation
EDCON is a global conference for the Ethereum community, offering sponsorship opportunities and hosted side events such as networking sessions, talks, workshops, and exhibitions.
Crypto & Web3
ETH Belgrade is a Web3 and Ethereum event, comprising a conference and a hackathon, aimed at developers, blockchain enthusiasts, and Ethereum community members.
Crypto & Web3Belgrade, RS
ETHToronto is an in-person blockchain and Ethereum education and networking event held in Toronto, featuring speakers, stages, and exhibitor booths, and is run alongside the Blockchain Futurist Conference.
Crypto & Web3Media & EntertainmentToronto, CA
Futurist Conference is a North American Web3 and AI event featuring 250+ speakers, expo booths, and networking sessions covering blockchain, AI, NFTs, DeFi, cryptocurrency, and DAOs.
AI & Machine LearningCrypto & Web3Media & Entertainment
Everreach Labs is a game studio that builds console-grade original AA titles, including a co-op third-person shooter that ranked among the Top 10 most wishlisted on the Epic Games Store.
Creator EconomyGamingMedia & Entertainment
Futurist Conference is a Web3 and AI event in North America featuring speakers, expo booths, and networking sessions covering blockchain, cryptocurrency, NFTs, DeFi, DAOs, and AI.
AI & Machine LearningCrypto & Web3Media & Entertainment
Game Factory runs a community, incubation, and acceleration programs for mobile app and game developers, offering resources, events, mentorship, and investor lists.
Creator EconomyGaming
A Web3 AI execution technology providing access to CeFi, DeFi, and NFT markets via a conversational AI interface.
Havens Compass is a content journal publishing articles and guides on home design, wellness routines, and slow living for people who want to create calmer, more intentional living spaces.
ConsumerMedia & EntertainmentWellness & Fitness
HIT Games Conference (HGC) organizes international B2B events focused on development, publishing, and growth in the gaming market, covering mobile, PC, console, and Web3 games.
GamingMedia & Entertainment
InceptionLRT is winding down operations effective December 31, 2025; its web interface will be shut down and withdrawals will remain available through the associated chain's block explorer.
Crypto & Web3
InPulseX presents "Starseed Awakening," a narrative-driven video game that lets players create custom characters and explore a science-fiction storyline inspired by Zecharia Sitchin's writings and themes around colonising Mars.
ConsumerGaming
Kima Finance is a distributed settlement protocol that provides a single atomic rail for cross-ecosystem transfers across fiat, stablecoins, CBDCs, and tokenized assets, without bridges or smart contracts.
Crypto & Web3Data & InfrastructureFintech
Frequently asked questions
- What stage does Castrum Capital invest at?
- Castrum Capital invests at the Pre-Seed, Seed stages.
- What sectors does Castrum Capital focus on?
- Castrum Capital focuses on AI & Machine Learning, Crypto & Web3, Gaming.
- Where is Castrum Capital located?
- Castrum Capital is headquartered in Istanbul, TR.
Images
Similar investors
Hoxton Ventures is a European venture capital firm with a Silicon Valley mindset that invests early in founders building companies in new, non-obvious market categories, encouraging them to tackle the US market early.
Moonfire Ventures is an early-stage venture capital firm backing founders across a wide range of technology sectors.
OMERS Ventures is the venture capital arm of the OMERS pension plan, investing in early-stage technology founders building solutions across North America and Europe.
Samsung Next is the venture investing arm that backs early-stage founders building bold, ambitious technology companies.
Viola is Israel's leading technology investment group managing over $7 billion in assets, operating multiple independent investment arms that partner with technology companies from inception through growth.