Castle Island Ventures
Castle Island Ventures is a venture capital firm based in Cambridge, United States. This profile covers what Castle Island Ventures invests in, its typical stage and check size, and how founders can get in front of it in 2026.
Castle Island Ventures is a venture capital firm,
- Location
- Cambridge, United States
- Founded
- 2018
- Team size
- 1-10
- Investments
- 10
- Typical round
- $5.3M
How to pitch Castle Island Ventures
The founders who hear back from Castle Island Ventures lead with traction and a clear ask that matches its stage, not a generic mass email. Build a targeted, verified list, write a personalized note, and track who opens it, all in one place.
Connect with Castle Island Ventures
Frequently Asked Questions
What is Castle Island Ventures?
Castle Island Ventures is a venture capital firm based in Cambridge, United States. Round Funded tracks its focus, stage, and activity alongside thousands of active investors.
What is Castle Island Ventures's typical check size?
Castle Island Ventures's typical round is around $5.3M. Use it as a signal for whether your raise fits its stage.
Is Castle Island Ventures actively investing?
Yes, Castle Island Ventures is an active a venture capital firm. Reach out with a personalized pitch that fits its stage and focus, then track who opens it.
Where is Castle Island Ventures based?
Castle Island Ventures is based in Cambridge, United States. You can reach out from anywhere with a pitch that matches its focus.
How do I contact Castle Island Ventures?
Unlock Castle Island Ventures's verified email and reach out with a personalized pitch on Round Funded Accelerator. We show only deliverable contacts, so your outreach does not bounce.