Business and Nature of Operations	12 Months Ended
Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business and Nature of Operations	(1) Business and Nature of Operations Everbridge, Inc., a Delaware corporation (together with its wholly-owned subsidiaries, referred to as Everbridge or the Company), is a global software company that provides critical communications and enterprise safety applications that enable customers to automate and accelerate the process of keeping people safe and businesses running during critical events. The Company’s SaaS-based platform enables the Company’s customers to quickly and reliably deliver messaging to a large group of people during critical situations. The Company’s enterprise applications, such as Mass Notification, Incident Management, IT Alerting, Safety Connection, Community Engagement, Secure Messaging, Crisis Commander, Population Alerting and Visual Command Center, automate numerous critical communications processes. The Company generates revenue primarily from subscription fees to the Company’s enterprise applications. The Company has operations in the United States, Norway, India, the Netherlands, Sweden, England and China. Follow-On Public Offerings In April 2017, the Company completed a follow-on public offering in which the Company sold 553,825 shares of its common stock, which included 26,825 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $19.85 per share. In addition, 3,162,164 shares of the Company’s common stock were sold by selling stockholders of the Company, which included 73,000 shares sold pursuant to the exercise of employee stock options by certain selling stockholders. The Company received net proceeds of $9.9 million, after deducting underwriting discounts and commissions and offering expenses paid and payable by the Company. The Company did not receive any proceeds from the sales by the selling stockholders. In January 2019, the Company completed a follow-on public offering in which the Company sold 2,645,000 shares of its common stock, which included 345,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $55.25 per share. The Company received net proceeds of $139.7 million, after deducting underwriting discounts and commissions.

Business and Nature of Operations

12 Months Ended

Dec. 31, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

(1) Business and Nature of Operations

Everbridge, Inc., a Delaware corporation (together with its wholly-owned subsidiaries, referred to as Everbridge or the Company), is a global software company that provides critical communications and enterprise safety applications that enable customers to automate and accelerate the process of keeping people safe and businesses running during critical events. The Company’s SaaS-based platform enables the Company’s customers to quickly and reliably deliver messaging to a large group of people during critical situations. The Company’s enterprise applications, such as Mass Notification, Incident Management, IT Alerting, Safety Connection, Community Engagement, Secure Messaging, Crisis Commander, Population Alerting and Visual Command Center, automate numerous critical communications processes. The Company generates revenue primarily from subscription fees to the Company’s enterprise applications. The Company has operations in the United States, Norway, India, the Netherlands, Sweden, England and China.

Follow-On Public Offerings

In April 2017, the Company completed a follow-on public offering in which the Company sold 553,825 shares of its common stock, which included 26,825 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $19.85 per share. In addition, 3,162,164 shares of the Company’s common stock were sold by selling stockholders of the Company, which included 73,000 shares sold pursuant to the exercise of employee stock options by certain selling stockholders. The Company received net proceeds of $9.9 million, after deducting underwriting discounts and commissions and offering expenses paid and payable by the Company. The Company did not receive any proceeds from the sales by the selling stockholders.

In January 2019, the Company completed a follow-on public offering in which the Company sold 2,645,000 shares of its common stock, which included 345,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $55.25 per share. The Company received net proceeds of $139.7 million, after deducting underwriting discounts and commissions.