# Castle Island Ventures' Web3 & Crypto Investments: 26 Startups in Its Portfolio (2026) > The 26 Web3 & Crypto startups Castle Island Ventures has backed, by stage: $450M raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/castle-island-ventures-web3-crypto-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Pre-seed and seed 15 - [Delta](https://millionrounds.com/company/delta) - [Fordefi](https://millionrounds.com/company/fordefi) - [SatLayer](https://millionrounds.com/company/satlayer) - [Ansible Labs](https://millionrounds.com/company/ansible-labs) - [ARX](https://millionrounds.com/company/arx) - [Nirvana Labs](https://millionrounds.com/company/nirvana-labs) - [DFX Finance](https://millionrounds.com/company/dfx-finance) - [Station70](https://millionrounds.com/company/station70) - [Tesser](https://millionrounds.com/company/tesser) - [PYOR](https://millionrounds.com/company/pyor) - [Kintsu](https://millionrounds.com/company/kintsu) - [*Z* Zabo](https://millionrounds.com/company/zabo) - [Mint Songs](https://millionrounds.com/company/mint-songs) - [Gondor](https://millionrounds.com/company/gondor) - [SoundMint](https://millionrounds.com/company/soundmint) ## Stage not reported 8 - [BabylonChain](https://millionrounds.com/company/babylonchain) - [River](https://millionrounds.com/company/river) - [Flipside Crypto](https://millionrounds.com/company/flipside-crypto) - [Build on Bitcoin](https://millionrounds.com/company/build-on-bitcoin) - [Notabene](https://millionrounds.com/company/notabene) - [Coin Metrics](https://millionrounds.com/company/coin-metrics) - [Groma](https://millionrounds.com/company/groma) - [Capsule Social](https://millionrounds.com/company/capsule-social) ## Series A 3 - [*T* Tally](https://millionrounds.com/company/tally) - [XFX](https://millionrounds.com/company/xfx) - [Mountain Protocol](https://millionrounds.com/company/mountain-protocol) ## Segment by segment ### Pre-seed and seed 15 startups · $82M raised - [**Delta**](https://millionrounds.com/company/delta) Delta is the ultimate Bitcoin & cryptocurrency portfolio tracker app. Switzerland $11M - [**Fordefi**](https://millionrounds.com/company/fordefi) Fordefi is a company that specialises in financial technology and software. United States $10M - [**SatLayer**](https://millionrounds.com/company/satlayer) SatLayer is the leading restaking platform unlocking Bitcoin's full potential for capital efficiency, liquidity, and shared security. Singapore $8.0M - [**Ansible Labs**](https://millionrounds.com/company/ansible-labs) Ansible Labs' platform, Beam, connects blockchains and bank accounts. United States $7.0M - [**ARX**](https://millionrounds.com/company/arx) Arx is an AI-driven real estate analytics and underwriting platform that assists developers, investors, and brokers in sourcing an United States $6.2M - [**Nirvana Labs**](https://millionrounds.com/company/nirvana-labs) Nirvana Labs is a bare-metal cloud platform designed specifically for the Web3 ecosystem. United States $6.0M - [**DFX Finance**](https://millionrounds.com/company/dfx-finance) DFX Finance is a decentralized foreign exchange protocol built on the Ethereum blockchain, focused on trading and managing fiat-ba United States $5.0M - [**Station70**](https://millionrounds.com/company/station70) Station70 is a cybersecurity firm based in Nashville, Tennessee, founded in 2023. United States $5.0M ### Stage not reported 8 startups · $171M raised - [**BabylonChain**](https://millionrounds.com/company/babylonchain) Babylon designs security protocols to leverage security for decentralized systems, allowing features like secure timestamps and staking. United States $75M - [**River**](https://millionrounds.com/company/river) River is an electric vehicle startup building multi-utility scooters. United States $47M - [**Flipside Crypto**](https://millionrounds.com/company/flipside-crypto) AI tools fail on expert work because they're missing context. United States $14M - [**Build on Bitcoin**](https://millionrounds.com/company/build-on-bitcoin) Build on Bitcoin is a hybrid Layer-2 network Bitcoin blockchain Cayman Islands $14M - [**Notabene**](https://millionrounds.com/company/notabene) Notabene is a New York-based FinTech and RegTech company founded in 2020. United States $12M - [**Coin Metrics**](https://millionrounds.com/company/coin-metrics) Coin Metrics is a provider of crypto financial intelligence providing network data, market data, index, and network risk solutions. United States $8.6M - [**Groma**](https://millionrounds.com/company/groma) Groma is a vertically integrated real estate investment, development and management company United States $1.0M - [**Capsule Social**](https://millionrounds.com/company/capsule-social) Capsule is a France-based decentralized social networking platform that allows individuals to create, connect, share, discover and France $102K ### Series A 3 startups · $197M raised - [*T* **Tally**](https://millionrounds.com/company/tally) United States $163M - [**XFX**](https://millionrounds.com/company/xfx) XFX is a fintech company focused on enhancing foreign exchange (FX) and international settlement infrastructure. United States $26M - [**Mountain Protocol**](https://millionrounds.com/company/mountain-protocol) We believe that everyone deserves access to the "risk-free rate" through a secure, regulated, and enterprise-grade product. United States $8.0M **How this map is made.** Every startup here works in Web3 & Crypto and has raised money in a round we track that names Castle Island Ventures as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Portfolio map **Castle Island Ventures portfolio map** 46 startups · $1.9B](https://millionrounds.com/portfolio-maps/castle-island-ventures-portfolio-map)[Co-investors **Who invests with Castle Island Ventures** 37 co-investors](https://millionrounds.com/portfolio-maps/castle-island-ventures-co-investors)[Sector portfolio **Techstars' AI portfolio** 336 startups · $4.9B](https://millionrounds.com/portfolio-maps/techstars-ai-portfolio)[Sector portfolio **Alumni Ventures' AI portfolio** 302 startups · $36B](https://millionrounds.com/portfolio-maps/us-strategic-tech-fund-an-alumni-ventures-fund-ai-portfolio)[Sector portfolio **Andreessen Horowitz's AI portfolio** 259 startups · $426B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-ai-portfolio)[Sector portfolio **General Catalyst's AI portfolio** 226 startups · $179B](https://millionrounds.com/portfolio-maps/general-catalyst-ai-portfolio) ## Raising from investors like Castle Island Ventures? 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