comScore (SCOR) POSASR Automatic shelf registration (post-effective amendment)

Exhibit 23.3

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in this Registration Statement (Amendment No. 1 to Form S-3 No. 333-231778) and related Prospectus of comScore, Inc. for the registration of common stock and to the incorporation by reference therein of our report dated March 23, 2018, with respect to the consolidated financial statements of comScore, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2018, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Tysons, Virginia

January 31, 2020