Castle Island Ventures

General contacts

Investor type

Founded

2018

AUM

Location

Boston, Massachusetts, United States

Investment Ticket

$1-5 m

Investment Stage

Seed Pre-seed Series A

Region of investment

North America

Investor profile last updated: 18 August, 2026

Profile

Castle Island Ventures is a venture capital firm based in Cambridge, Massachusetts, founded in 2018. The firm focuses exclusively on public blockchains, investing in infrastructure and application companies that aim to enable transformative protocols. The team includes experienced professionals with backgrounds in finance and technology, leveraging their expertise to support entrepreneurs in the blockchain space.

The firm invests primarily in early-stage companies at the intersection of traditional finance and public blockchains. Their typical investment size ranges from $100K to $5M, focusing on sectors such as fintech, cybersecurity, and data services. Castle Island Ventures has a total of three funds, including Castle Island Ventures III, which closed in 2022.

Notable investments by Castle Island Ventures include MoonPay - a cryptocurrency payment service, BlockFi - a financial services company, and Bitwise - a crypto asset management firm. These investments highlight the firm's commitment to supporting innovative companies in the blockchain and fintech sectors.

Industry

LegalTech Infrastructure Software Security Media and Entertainment Foodtech Food and Beverage Financial Services Fashion/Beauty Edtech Education Blockchain/Crypto Networking Fintech Business Services (B2B) Cybersecurity Web3 Developer Tools Data infra

Castle Island Ventures Funds

Name	Type	Industry	Stage	Region	Size	AUM	Launch date
Castle Island Ventures III	Venture Capital (VC)	Business Services (B2B) Fintech Networking Blockchain/Crypto Education Edtech Fashion/Beauty Financial Services Food and Beverage Foodtech Media and Entertainment Security Software Infrastructure LegalTech	Seed Series A	North America	$1-5 m	—	January 2022

Contacts

Name

Title

Social Networks

Nic Carter Partner

Partner

n•••@•••

Hunter Merghart Executive In Residence and Venture Partner

Executive In Residence and Venture Partner

h•••@•••

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[email protected]

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Investment-team contacts for Castle Island Ventures — including verified work emails and LinkedIn profiles — are available to Private Equity List subscribers.
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Contacts sourced from the firm's website and LinkedIn, re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.

FAQs about Castle Island Ventures

Is Castle Island Ventures a venture capital or private equity firm?

Castle Island Ventures is a venture capital firm. It backs companies at Seed, Pre-seed and Series A, writing tickets of $1-5 m.

Where is Castle Island Ventures located?

Castle Island Ventures is located in Boston, Massachusetts, United States.

When was Castle Island Ventures founded?

Castle Island Ventures was founded in 2018.

What sectors and industries does Castle Island Ventures invest in?

Castle Island Ventures invests in companies and startups in LegalTech, Infrastructure, Software, Security, Media and Entertainment, Foodtech, Food and Beverage, Financial Services, Fashion/Beauty, Edtech, Education, Blockchain/Crypto, Networking, Fintech, Business Services (B2B), Cybersecurity, Web3, Developer Tools, Data infra.

What is Castle Island Ventures geographical focus of investments?

Castle Island Ventures invests in companies and startups in North America.

At what stages of companies and startups does Castle Island Ventures typically invest in?

Castle Island Ventures invests in companies and startups at Seed, Pre-seed, Series A.

What is the usual amount of Castle Island Ventures investment?

Castle Island Ventures usually invests $1-5 m on average.

What are the contacts of Castle Island Ventures?

Castle Island Ventures can be reached through its website castleisland.vc and its LinkedIn page. Its general enquiries address is [email protected]. Cold-mailing a general inbox rarely reaches a partner, so Private Equity List also lists the investment-team contacts for Castle Island Ventures — names, roles, verified work emails and LinkedIn profiles — available on a Pro plan from $129/month (see pricing). Contacts are sourced from the firm's website and LinkedIn and re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.

Can I access Castle Island Ventures data via API or MCP?

Yes. Every field on this page — profile, funds, investment criteria, portfolio and investment-team contacts — is available programmatically through the Private Equity List REST API and MCP server, so AI assistants such as Claude and ChatGPT can query Castle Island Ventures directly instead of scraping this page. One subscription covers both the web app and machine access — see API & MCP.

When was the Castle Island Ventures profile last updated?

Private Equity List re-verifies investor profiles on a rolling cycle, pulling from the firm's own website and LinkedIn rather than a one-off import. This profile was last updated on 18 August, 2026. Something out of date here? Report it — we re-run that firm within 48h and get back to you.