# Castle Island Ventures Portfolio Map 2026: 46 Startups by Sector > Castle Island Ventures' portfolio mapped: 46 startups it has backed, in 5 sectors from Web3 & Crypto, Fintech and IT Services on. Source: https://millionrounds.com/portfolio-maps/castle-island-ventures-portfolio-map (Millionrounds; every figure on the page links to its filing or article) ## Web3 & Crypto 27 - [*T* Tally](https://millionrounds.com/company/tally) - [BabylonChain](https://millionrounds.com/company/babylonchain) - [River](https://millionrounds.com/company/river) - [XFX](https://millionrounds.com/company/xfx) - [ZenLedger](https://millionrounds.com/company/zenledger) - [Flipside Crypto](https://millionrounds.com/company/flipside-crypto) - [Build on Bitcoin](https://millionrounds.com/company/build-on-bitcoin) - [Notabene](https://millionrounds.com/company/notabene) - [Delta](https://millionrounds.com/company/delta) - [Fordefi](https://millionrounds.com/company/fordefi) - [Coin Metrics](https://millionrounds.com/company/coin-metrics) - [Mountain Protocol](https://millionrounds.com/company/mountain-protocol) - [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) +3 more ## Fintech 9 - [*S* StablecoinX](https://millionrounds.com/company/stablecoinx) - [*F* Flix](https://millionrounds.com/company/felix) - [*FP* Félix Pago](https://millionrounds.com/company/felix-pago-2) - [*B* Bitwise](https://millionrounds.com/company/bitwise) - [Yellow Card](https://millionrounds.com/company/yellow-card) - [*HR* Hidden Road](https://millionrounds.com/company/hidden-road) - [Valinor](https://millionrounds.com/company/valinor) - [Surus](https://millionrounds.com/company/surus) - [Coala Pay](https://millionrounds.com/company/coala-pay) ## IT Services 4 - [Cyclops.io](https://millionrounds.com/company/cyclops-io) - [Project Eleven](https://millionrounds.com/company/project-eleven) - [Alpen Labs](https://millionrounds.com/company/alpen-labs) - [CAT Labs](https://millionrounds.com/company/cat-labs) ## Big Data & Analytics 3 - [Atrium](https://millionrounds.com/company/atrium) - [dawn](https://millionrounds.com/company/dawn) - [evaluate.xyz](https://millionrounds.com/company/evaluate-xyz) ## AI 3 - [Casa](https://millionrounds.com/company/casa) - [Mash](https://millionrounds.com/company/mash) - [Attestiv](https://millionrounds.com/company/attestiv) ## Segment by segment ### Web3 & Crypto 27 startups · $466M raised - [*T* **Tally**](https://millionrounds.com/company/tally) United States $163M - [**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 - [**XFX**](https://millionrounds.com/company/xfx) XFX is a fintech company focused on enhancing foreign exchange (FX) and international settlement infrastructure. United States $26M - [**ZenLedger**](https://millionrounds.com/company/zenledger) ZenLedger is a cryptocurrency tax and accounting software platform founded in 2017. United States $17M - [**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 ### Fintech 9 startups · $1.2B raised - [*S* **StablecoinX**](https://millionrounds.com/company/stablecoinx) United States $530M - [*F* **Flix**](https://millionrounds.com/company/felix) Brazil $388M - [*FP* **Félix Pago**](https://millionrounds.com/company/felix-pago-2) United States $75M - [*B* **Bitwise**](https://millionrounds.com/company/bitwise) United States $74M - [**Yellow Card**](https://millionrounds.com/company/yellow-card) Yellow Card is the largest and only licensed Stablecoin on/off ramp on the African continent. Nigeria $73M - [*HR* **Hidden Road**](https://millionrounds.com/company/hidden-road) Hidden Road is the global credit network for institutional investors and provides easy access to both traditional and digital markets. United Kingdom $50M - [**Valinor**](https://millionrounds.com/company/valinor) Valinor Enterprises Inc. United States $25M - [**Surus**](https://millionrounds.com/company/surus) Surus is an asset management, custody, and compliance platform designed for institutional clients. United States $11M ### IT Services 4 startups · $62M raised - [**Cyclops.io**](https://millionrounds.com/company/cyclops-io) Cyclops is a collaborative environment that brings the experience of a physical conference room to distributed teams who are working online. United States $28M - [**Project Eleven**](https://millionrounds.com/company/project-eleven) Project Eleven is dedicated to building resilient infrastructure and tools to secure digital assets for the post-quantum era. United States $20M - [**Alpen Labs**](https://millionrounds.com/company/alpen-labs) Alpen Labs is a Delaware-registered company dedicated to developing Bitcoin-native financial markets and infrastructure. United States $8.5M - [**CAT Labs**](https://millionrounds.com/company/cat-labs) CAT Labs is a Miami-based, woman-owned cybersecurity and crypto-forensics company founded in 2022 by former U.S. United States $5.4M ### Big Data & Analytics 3 startups · $42M raised - [**Atrium**](https://millionrounds.com/company/atrium) Atrium is a leading AI-native consultancy based in Bozeman, Montana, specializing in the Snowflake and Salesforce ecosystems. United States $24M - [**dawn**](https://millionrounds.com/company/dawn) Dawn is an AI workforce platform designed specifically for manufacturing and product-driven organizations. United States $14M - [**evaluate.xyz**](https://millionrounds.com/company/evaluate-xyz) evaluate.market, Inc., operating as evaluate.xyz, specializes in online services related to digital assets and blockchain technology. United States $4.0M ### AI 3 startups · $52M raised - [**Casa**](https://millionrounds.com/company/casa) Casa is a facility management company that provides commercial cleaning services. United States $42M - [**Mash**](https://millionrounds.com/company/mash) One-stop platform to build your community and monetize creativity Canada $8.0M - [**Attestiv**](https://millionrounds.com/company/attestiv) Attestiv is an AI software platform that verifies the authenticity of digital media and data for businesses. United States $2.0M **How this map is made.** Every startup here has raised money in a round we track that names Castle Island Ventures as an investor, the first in 2019. Each sits under its main sector, read from its rounds, and each shows its best-funded first. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Co-investors **Who invests with Castle Island Ventures** 37 co-investors](https://millionrounds.com/portfolio-maps/castle-island-ventures-co-investors)[Sector portfolio **Castle Island Ventures' Web3 & Crypto portfolio** 26 startups · $450M](https://millionrounds.com/portfolio-maps/castle-island-ventures-web3-crypto-portfolio)[Portfolio map **Techstars portfolio map** 1,119 startups · $16B](https://millionrounds.com/portfolio-maps/techstars-portfolio-map)[Portfolio map **Alumni Ventures portfolio map** 745 startups · $64B](https://millionrounds.com/portfolio-maps/us-strategic-tech-fund-an-alumni-ventures-fund-portfolio-map)[Portfolio map **Andreessen Horowitz portfolio map** 694 startups · $497B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-portfolio-map)[Portfolio map **Sequoia Capital portfolio map** 651 startups · $677B](https://millionrounds.com/portfolio-maps/sequoia-capital-portfolio-map) ## Raising from investors like Castle Island Ventures? 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