The Company has provided in this release financial information that has not been prepared in accordance with Generally Accepted Accounting Principles (GAAP). Management uses these non-GAAP financial measures internally in analyzing our financial results and believes they are useful to investors, as a supplement to GAAP measures, in evaluating the Company's ongoing operational performance. Management believes that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating 8x8's ongoing operating results and trends and in comparing financial results with other companies in the industry, many of which present similar non-GAAP financial measures to investors.

Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. Investors are encouraged to review the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measures. This reconciliation has been provided in the financial statement tables included below in this press release.

Non-GAAP Net Income and Non-GAAP Net Income Per Share

We have defined non-GAAP net income as net income for GAAP plus non-cash tax adjustments, stock-based compensation, amortization of acquired intangible assets, and acquisition-related costs. Non-cash tax adjustments represent the difference between the amount of taxes we expect to pay and our GAAP tax provision each period. We have excluded stock-based compensation expense because it relies on estimates and assumptions about future events, such as our future common stock price and the duration of employee

service, as well as valuations that are affected by market factors largely outside management's control. Amortization of acquired intangible assets is excluded because it is a non-cash expense that we do not consider part of ongoing operations when assessing our financial performance, as it relates to accounting for certain purchased assets. We have excluded acquisition-related expenses because these expenses are difficult to predict and are often one-time. We define non-GAAP net income per share as non-GAAP net income divided by the weighted-average diluted shares outstanding. We define non-GAAP net income percentage of revenue as non-GAAP net income divided by revenue. The GAAP and non-GAAP weighted average number of diluted shares to calculate GAAP and non-GAAP earnings per share are the same. We believe that such exclusions facilitate comparisons to our historical operating results and to the results of other companies in the same industry, and provides investors with information that we use in evaluating management's performance on a quarterly and annual basis.

This news release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 21E of the Securities Exchange Act of 1934. These statements include, without limitation, information about future events based on current expectations, potential product development efforts, near and long-term objectives, potential new business, strategies, organization changes, changing markets, future business performance and outlook. Such statements are predictions only, and actual events or results could differ materially from those made in any forward-looking statements due to a number of risks and uncertainties. Actual results and trends may differ materially from historical results or those projected in any such forward-looking statements depending on a variety of factors. These factors include, but are not limited to, market acceptance of new or existing services and features, success of our efforts to target mid-market and larger distributed enterprises, changes in the competitive dynamics of the markets in which we compete, customer cancellations and rate of churn, impact of current economic climate and adverse credit markets on our target customers, our ability to scale our business, our reliance on infrastructure of third-party network services providers, risk of failure in our physical infrastructure, risk of failure of our software, our ability to maintain the compatibility of our software with third-party applications and mobile platforms, continued compliance with industry standards and regulatory requirements, risks relating to our strategies and objectives for future operations, including the execution of integration plans and realization of the expected benefits of our acquisitions, the amount and timing of costs associated with recruiting, training and integrating new employees, introduction and adoption of our cloud communications and collaboration services in markets outside of the United States, risks regarding compliance with regulations in the United States and foreign jurisdictions in which our services are provided, and general economic conditions that could adversely affect our business and operating results. For a discussion of such risks and uncertainties, which could

cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's reports on Forms 10-K and 10-Q, as well as other reports that 8x8, Inc. files from time to time with the Securities and Exchange Commission. All forward-looking statements are qualified in their entirety by this cautionary statement, and 8x8, Inc. undertakes no obligation to update publicly any forward-looking statement for any reason, except as required by law, even as new information becomes available or other events occur in the future.

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