Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on Form F-1 of our report dated April 4, 2025, relating to the combined carve-out financial statements of Rubico Inc. Predecessor appearing in the registration statement on Form 20-F of Rubico Inc.. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ Deloitte Certified Public Accountants S.A.

Athens, Greece

August 12, 2025