Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in this Pre-Effective Amendment No. 1 to the Registration Statement (Form S-3 No. 333-179098) and related Prospectus of ExlService Holdings, Inc. for the registration of common stock, preferred stock, debt securities, depository shares, warrants, rights, purchase contracts and units and to the incorporation by reference therein of our reports dated March 16, 2011, with respect to the consolidated financial statements of ExlService Holdings, Inc. and subsidiaries, and the effectiveness of internal control over financial reporting of ExlService Holdings, Inc. and subsidiaries included in its Annual Report (Form 10-K) for the year ended December 31, 2010, filed with the Securities and Exchange Commission.

/s/    Ernst & Young LLP

New York, New York

January 31, 2012