Exhibit 99.1

FOR IMMEDIATE RELEASE

Contact: Charles Murphy, CFA

Head of Investor Relations

ExlService Holdings, Inc.

280 Park Avenue

New York, NY 10017

(212) 624-5913

ir@exlservice.com

EXL REPORTS 2013 SECOND QUARTER RESULTS

Quarterly Revenues of $116.0 Million, Up 7% Year over Year

Adjusted Diluted Earnings Per Share (EPS) of $0.37

New York, NY – July 30, 2013 – ExlService Holdings, Inc. (NASDAQ: EXLS), a leading provider of outsourcing and transformation services, today announced its financial results for the second quarter of 2013.

Rohit Kapoor, Vice Chairman and CEO, commented: “As expected, our second quarter revenues were flat sequentially, despite a currency headwind and project-based spending in transformation services not picking up as much as we had expected. On a constant currency basis, our reported revenues would have been higher by $1 million.

Since our last quarterly earnings release, the Indian rupee has depreciated 10% versus the US dollar, impacting the portion of our revenues where clients bear foreign exchange risk. Separately, delays in project-based spending and slower business ramp-ups will impact our revenue and adjusted diluted earnings per share growth this year versus our prior projections.

We are seeing continued strength in demand for our domain-focused services in insurance and healthcare. We are pleased to see that our pipeline has grown and deepened particularly in finance and accounting, with an increase in both the number and average size of deals.”

Vishal Chhibbar, CFO, commented: “In the second quarter, EXL generated revenues of $116.0 million, up 7% year over year, driven by 10% growth in outsourcing. Excluding previously announced client transitions, constant currency revenues grew 11% year over year and 1% sequentially. Second quarter adjusted diluted earnings per share were $0.37, up 3% year over year, as revenue growth was offset by annual wage increments and a significant expansion of our analytics team. These investments are key to sustainable long-term growth in our targeted verticals.

For 2013, we are revising our guidance for revenues to $475 million to $483 million, due to a $6 million impact of foreign exchange and softer forecast growth in the second half of the year. We are revising our adjusted diluted EPS guidance to $1.71 to $1.79, representing year over year growth of 8% to 13%. We expect revenue growth in the second half of the year, driven by expected broad-based volume increases across our businesses.”

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Financial Highlights – Second Quarter 2013

Reconciliations of adjusted financial measures to GAAP are included at the end of this release.

Business Highlights

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2013 Outlook

Based on current visibility and assuming a second half of 2013 exchange rate of 59 Indian rupees to the US dollar, we are revising our annual guidance to:

Conference Call

ExlService Holdings, Inc. will host a conference call on Tuesday, July 30, 2013 at 8:00 a.m. (ET) to discuss the Company’s quarterly operating and financial results. The conference call will be available live via the internet by accessing the investor relations section of EXL’s website at ir.exlservice.com, where an accompanying investor-friendly spreadsheet of historical operating and financial data can also be accessed. Please go to the website at least fifteen minutes prior to the call to register, download and install any necessary audio software.

To listen to the conference call via phone, please dial 1-877-303-6384 or 1-224-357-2191 and an operator will assist you. For those who cannot access the live broadcast, a replay will be available on the EXL website (ir.exlservice.com).

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About ExlService Holdings, Inc.

ExlService Holdings, Inc. (Nasdaq:EXLS) is a leading provider of outsourcing and transformation services. EXL primarily serves the needs of Global 1000 companies from global delivery centers in the insurance, healthcare, utilities, banking and financial services, transportation and logistics and travel sectors. EXL’s outsourcing services include a full spectrum of business process management services such as transaction processing and finance and accounting services. Transformation services enable continuous improvement of client processes by bringing together EXL’s capabilities in decision analytics, finance transformation and operations and process excellence services. Find additional information about EXL at www.exlservice.com.

This press release contains forward-looking statements. You should not place undue reliance on those statements because they are subject to numerous uncertainties and factors relating to the Company’s operations and business environment, all of which are difficult to predict and many of which are beyond the Company’s control. Forward-looking statements include information concerning the Company’s possible or assumed future results of operations, including descriptions of its business strategy. These statements may include words such as “may,” “will,” “should,” “believe,” “expect,” “anticipate,” “intend,” “plan,” “estimate” or similar expressions. These statements are based on assumptions that we have made in light of management’s experience in the industry as well as its perceptions of historical trends, current conditions, expected future developments and other factors it believes are appropriate under the circumstances. You should understand that these statements are not guarantees of performance or results. They involve known and unknown risks, uncertainties and assumptions. Although the Company believes that these forward-looking statements are based on reasonable assumptions, you should be aware that many factors could affect the Company’s actual financial results or results of operations and could cause actual results to differ materially from those in the forward-looking statements. These factors are discussed in more detail in the Company’s filings with the Securities and Exchange Commission, including the Company’s Annual Report on Form 10-K for the year ended December 31, 2012. These risks could cause actual results to differ materially from those implied by forward-looking statements in this release. You should keep in mind that any forward-looking statement made herein, or elsewhere, speaks only as of the date on which it is made. New risks and uncertainties come up from time to time, and it is impossible to predict these events or how they may affect the Company. The Company has no obligation to update any forward-looking statements after the date hereof, except as required by federal securities laws.

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EXLSERVICE HOLDINGS, INC.

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

(In thousands, except share and per share amounts)

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EXLSERVICE HOLDINGS, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

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EXLSERVICE HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

Reconciliation of Adjusted Financial Measures to GAAP Measures

In addition to its reported operating results in accordance with U.S. generally accepted accounting principles (GAAP), EXL has included in this release adjusted financial measures (adjusted EBITDA, adjusted net income and adjusted diluted earnings per share) that the Securities and Exchange Commission defines as “non-GAAP financial measures.” The adjusted financial measures disclosed by the Company should not be considered a substitute for, or superior to, financial measures calculated in accordance with GAAP, and the financial results calculated in accordance with GAAP and reconciliations from those financial statements should be carefully evaluated. The Company believes that providing these adjusted measures may help investors better understand the Company’s underlying financial performance. Management also believes that these adjusted financial measures, when read in conjunction with the Company’s reported results, can provide useful supplemental information for investors analyzing period to period comparisons of the Company’s results and comparisons of the Company’s results with the results of other companies. The Company believes that it is unreasonably difficult to provide its financial outlook in accordance with GAAP for a number of reasons including, without limitation, the Company’s inability to predict its future stock-based compensation expense under ASC Topic 718 and the amortization of intangibles associated with further acquisitions. The Company also incurs significant non-cash charges for depreciation that may not be indicative of the Company’s ability to generate cash flow.

Additionally, the Company provides certain information on a constant currency basis, which reflects a comparison of current period results translated at the prior period currency rates. This information is provided because the Company believes that it provides useful incremental information to investors regarding the Company’s operating performance.

The following table shows the reconciliation of these adjusted financial measures from GAAP measures for the three months ended June 30, 2013 and June 30, 2012 and for the three months ended March 31, 2013:

Reconciliation of Adjusted Operating Income and Adjusted EBITDA

(Amounts in thousands)

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Reconciliation of Adjusted Net Income and Adjusted Diluted Earnings Per Share

(Amounts in thousands, except per share data)

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