UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 6, 2018

Everbridge, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (818) 230-9700

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

On August 6, 2018, Everbridge, Inc. (the “Company”) issued a press release announcing its financial results for the quarter ended June 30, 2018. The Company’s press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

On August 6, 2018, the Company issued a press release announcing its financial results for the quarter ended June 30, 2018.

The information included in Item 7.01 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT 99.1

Everbridge Announces Second Quarter 2018 Financial Results

Second Quarter Revenue Increased 43% Year-over-Year

Burlington, Mass – August 6, 2018 – Everbridge, Inc. (NASDAQ: EVBG), the global leader in critical event management and enterprise safety software applications to help keep people safe and businesses running, today announced its financial results for the second quarter ended June 30, 2018.

“Our strong second quarter results exceeded our guidance ranges for both revenue and non-GAAP profitability,” said Jaime Ellertson, Chief Executive Officer and Chairman of Everbridge. “Our performance was driven by the increasing global demand for Everbridge Mass Notification, further growth in the number and size of multi-product deals at new and existing customers, and on-going upgrades and adoption of our Critical Event Management platform. During the quarter we also saw our core international business continue to accelerate, which was further bolstered by our recent UMS acquisition.”

Ellertson continued, “Our strong Q2 performance across all of our key growth drivers gives us the confidence to raise our revenue expectations for the full year. Additionally, the combination of our accelerating international performance plus our expansion in the federal market enabled by our recent FedRAMP authorization will support our continued success as a leader in our large multi-billion-dollar Critical Event Management market.”

Second Quarter 2018 Financial Highlights

Recent Business Highlights

Business Outlook

Based on information available as of today, Everbridge is issuing guidance for the third quarter and full year 2018 as indicated below.

(All figures in millions, except per share data)

Conference Call Information

About Everbridge, Inc.

Everbridge, Inc. (NASDAQ: EVBG) is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to keep people safe and businesses running. During public safety threats such as active shooter situations, terrorist attacks or severe weather conditions, as well as critical business events such as IT outages, cyber-attacks or other incidents such as product recalls or supply-chain interruptions, over 4,100 global customers rely on the company’s Critical Event Management Platform to quickly and reliably aggregate and assess threat data, locate people at risk and responders able to assist, automate the execution of pre-defined communications processes through the secure delivery to over 100 different communication devices, and track progress on executing response plans. The company’s platform sent over 2 billion messages in 2017, and offers the ability to reach 500 million people in more than 200 countries and territories including the entire mobile populations on a country-wide scale in Sweden, the Netherlands, the Bahamas, Singapore, Greece, Cambodia, and a number of the largest states in India. The company’s critical communications and enterprise safety applications include Mass Notification, Incident Management, Safety Connection™, IT Alerting, Visual Command Center^®, Crisis Commander^®, Community Engagement™ and Secure Messaging. Everbridge serves 9 of the 10 largest U.S. cities, 8 of the 10 largest U.S.-based investment banks, all 25 of the 25 busiest North American airports, six of the 10 largest global consulting firms, six of the 10 largest global automakers, all four of the largest global accounting firms, four of the 10 largest U.S.-based health care providers and four of the 10 largest U.S.-based health insurers. Everbridge is based in Boston and Los Angeles with additional offices in Lansing, San Francisco, Beijing, Kolkata, London, Oslo and Stockholm. For more information, visit www.everbridge.com, read the company blog, and follow on Twitter and Facebook.

Non-GAAP Financial Measures

This press release contains the following non-GAAP financial measures: non-GAAP cost of revenue, non-GAAP gross profit, non-GAAP gross margin, non-GAAP sales and marketing, non-GAAP research and development, non-GAAP general and administrative, non-GAAP operating expenses, non-GAAP operating income/(loss), non-GAAP net income/(loss), non-GAAP net income/(loss) per share, adjusted EBITDA, and free cash flow.

We believe that these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to Everbridge’s financial condition and results of operations. We use these non-GAAP measures for financial, operational and budgetary decision-making purposes, to understand and evaluate our core operating performance and trends, and to generate future operating plans. We believe that these non-GAAP financial measures provide useful information regarding past financial performance and future prospects, and permit us to more thoroughly analyze key financial metrics used to make operational decisions. We believe that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating ongoing operating results and trends and in comparing our financial measures with other software companies, many of which present similar non-GAAP financial measures to investors.

We do not consider these non-GAAP measures in isolation or as an alternative to financial measures determined in accordance with GAAP. The principal limitation of these non-GAAP financial measures is that they exclude significant expenses and income that are required by GAAP to be recorded in the Company’s financial statements. In addition, they are subject to inherent limitations as they reflect the exercise of judgment by management about which expenses and income are excluded or included in determining these non-GAAP financial measures. In order to compensate for these limitations, management presents non-GAAP financial measures in connection with GAAP results. We urge investors to review the reconciliation of our non-GAAP financial measures to the comparable GAAP financial measures, which are included in this press release, and not to rely on any single financial measure to evaluate our business.

Cautionary Language Concerning Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including but not limited to, statements regarding the anticipated opportunity and trends for growth in our critical communications and enterprise safety applications and our overall business, our market opportunity, our expectations regarding sales of our products, our goal to maintain market leadership and extend the markets in which we compete for customers, and our expected financial results for the second quarter of 2018 and the full fiscal year 2018. These forward-looking statements are made as of the date of this press release and were based on current expectations, estimates, forecasts and projections as well as the beliefs and assumptions of management. Words such as “expect,” “anticipate,” “should,” “believe,” “target,” “project,” “goals,” “estimate,” “potential,” “predict,” “may,” “will,” “could,” “intend,” variations of these terms or the negative of these terms and similar expressions are intended to identify these forward-looking statements. Forward-looking statements are subject to a number of risks and uncertainties, many of which involve factors or circumstances that are beyond our control. Our actual results could differ materially from those stated or implied in forward-looking statements due to a number of factors, including but not limited to: the ability of our products and services to perform as intended and meet our customers’ expectations; our ability to attract new customers and retain and increase sales to existing customers; our ability to increase sales of our Mass Notification application and/or ability to

increase sales of our other applications; developments in the market for targeted and contextually relevant critical communications or the associated regulatory environment; our estimates of market opportunity and forecasts of market growth may prove to be inaccurate; we have not been profitable on a consistent basis historically and may not achieve or maintain profitability in the future; the lengthy and unpredictable sales cycles for new customers; nature of our business exposes us to inherent liability risks; our ability to attract, integrate and retain qualified personnel; our ability to successfully integrate businesses and assets that we have acquired or may acquire in the future; our ability to maintain successful relationships with our channel partners and technology partners; our ability to manage our growth effectively; our ability to respond to competitive pressures; potential liability related to privacy and security of personally identifiable information; our ability to protect our intellectual property rights, and the other risks detailed in our risk factors discussed in filings with the U.S. Securities and Exchange Commission (“SEC”), including but not limited to our Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on March 12, 2018. The forward-looking statements included in this press release represent our views as of the date of this press release. We undertake no intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

Media Contact:

Jeff Young

Everbridge

jeff.young@everbridge.com

781-859-4116

Investor Contact:

Garo Toomajanian

ICR

ir@everbridge.com

818-230-9712

All Everbridge products are trademarks of Everbridge, Inc. in the USA and other countries. All other product or company names mentioned are the property of their respective owners.

Consolidated Balance Sheets

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Consolidated Statements of Comprehensive Loss

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Consolidated Statements of Cash Flows

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Reconciliation of GAAP measures to non-GAAP measures

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(Continued) Reconciliation of GAAP measures to non-GAAP measures

(in millions, except share and per share data)

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