Thank you and good afternoon, everyone. Q1 was a very strong start to 2017 with license revenues increasing 39% year-over-year. Total revenues for the first quarter were $53.5 million, an increase of 35% year-over-year, strong across both North America and Europe. We continue to add meaningful number of new customers and sell more existing ones. We provided solution for company-wide problem for delegating board level attention reducing risk, prevented compliance. Our results for the quarter reinforce that the steps we are taking to build a durable company with growth and scale are working. Now for a decade ago, Varonis' recognized that enterprise capacity to create and share data far exceeded it's capacity to protect it. We believe those advanced movement of information from analog to digital mediums combined with increasing information dependence, we changed both, the global economy and the risk profile of corporations and government. Since then, our focus has been on using innovation to address the cyber implications of this movement taking software to track and protect data wherever it is stored. We offer our customers an industry-leading platform that is built to protect the world's most valuable and most vulnerable data from both, internal and external threat. Our platforms eliminate repetitive manual clean-up projects and automates manual protection of teams; so it brings security and cost savings together providing under-staff security in IT departments with the solution they need. As data continue to grow on premises and in the cloud, the complexity of data protection increases combined with new relationship, the C-suite and Board of Directors realize that they must implement the strategy to manage and protect their data and are looking for partners that can solve evolving needs with our focus on innovation including our enhancements to data alone and our data security platform and more recent addition such as GDPR partner, automation engine in Varonis' stage, we are more and more becoming a partner of choice. Our operational journey detector event [ph] sustain is really a journey of value for our customers. By deploying and using our products, they unleashed the potential to be more secure, more efficient and more productive. When we are talking risk reduction preventing breaches or compliance user relation of GDPR, our operational journey provide context, the health of customers think about our business and our data protection efforts more realistically and guide our expense strategy. We rated 183 new customers in Q1 and 49% of our license in first year maintenance came from existing customers, up from 46% in the year ago period. 70% of our customers now have two or more product families compared with 66% in the year ago period and 37% of customers now have three or more product families, up from 31% a year ago. Once our customers started their journey and begin using our products, they usually realize that they need to use them more. We are training our sales team to use operational journey to better identify new opportunities and increase product usage; find and strength ties with new stakeholders and build stronger relationship with customers. We believe that operational journey give us an advantage as data protection and compliance projects like GPR come together and is leading to both border initial deployments and extension of existing deployment. For example; during Q1, a new customer and global retailer knew he needed to protect five system to prepare for GDPR. Varonis did a risk assessment on their U.S. and EU data stores was an eye-opening, and covering new citizen data in payment covering formation in folders [ph] operating to everyone in the organization. After reviewing the risk report, the customers IT security, legal and auditing teams were convinced they needed Varonis. They purchased DatAdvantage for Windows, DatAlert, DatJustification Engine for Windows and SharePoint and GDPR Patterns to find GDPR and other sensitive data. Somebody talked to omission [ph] in a layout to suspicious user activity. With are consultants in other companies could have best provide one-time studied snapshot of the file share [ph], Varonis make it possible for companies to take continuous action. As we have said consistently, while GDPR helps with awareness and present opportunity that we believe we are well positioned to capture, we don't lean on compliance alone and we focus on both, value that comes with adapting our comprehensive data security platform through these risk and breaches and all simplified compliance. In Q1, we continue to see more senior level executives realize they have to take ownership and control of their data. Too many organizations have over-exposed in unprotected files and emails on corporate networks worldwide; this is something security and IT have known for a long time and now we see the tight journey; more executives are now paying attention when they see how exposed they are through the Varonis risk assessment. In our recent publish Varonis data security report, we have build that on average 21% of an organization folder were accessible every employee and 41% of companies had at least 1,000 sensitive files open to all employees in the organization; those included unmanaged stale [ph] and sensitive data regulated by SOCS, HEPA, PCI [ph], GDPR and other standards and users responsible that never expire. The Varonis data risk report puts font [ph] in center while companies are being breached. With data related regulation now being enacted while both need to be very concerned and why we believe our solutions are so critical to solving these problems. To give you an idea, the magnitude of the problem, our risk report reveal that 58% of companies have over 100,000 folders open to every employee in the organization when they should have barely handful; almost all of them need to be fixed. Think about what it means from a risk perspective, and now think about what it means that fixing a single folder without breaking everything can take 6 to 8 hours if you try to fix it without Varonis. Please expect why demand is so strong to -- for our automation engine. The automating engine was built to fix these folders automatically, projects that would have taken months and quarters are now being completed in days or weeks. Executives are now beginning to understand that our solution has significantly decreased the likelihood of the breach and dramatically reduced the scope of potential damage. The automation engine induction was very strong again this quarter and is key differentiator for us. As an example, how compliance and risk reduction come together a global corporate law firm understood the impact of GDPR deadline could have on their organization. In Q1, they contacted Varonis for a data risk assessment to get an insight into sensitive data on their file servers and prepare for GDPR. During the data review we walked them through our potential journey explaining how it will help to reduce risk and simplify compliance at the same time. Varonis identify GDPR data residing under network and folders open to every employee. The firm estimated that it would take 200 days to fix these folders manually, the automation engine fixed them in five days. In addition, to purchasing the automation engine, the firm now went on file activity and user behavior with data advantage and gaining visibility into those sensitive files with data classification engine and GDPR pattern. In addition to compliance, data breach is a risk reduction; we have also been talking about the cloud and now we believe that we are especially well positioned to address challenges in high growth environments. Here is an example; in Q1 an employee in a large U.S. energy firm fell for efficient attack compromising dozens of Office 365 accounts. A target was then configured accounts sold, so user email would forward to an unknown outside others after struggling to understand the scope and impact of this attack with native auditing tools in Office 365 and customers [indiscernible], the company called Varonis. Varonis installed an advantage for share point in one drive and successfully removed this threat within two hours. They were already using DatAdvantage, DatAlert, Data Classification Engine and DataPrivilege for their on premise data stores and have now added support for the Office 365 environment. They are now equipped to track future incident and keep their data safer, both on premise and in the cloud. This quarter, we again saw accelerated adoption of our Office 365 solution preventing data breaches in cloud and on-premises data stores continue to be a major, major concern. And we see no slowdown in damaging high profile cyber-attacks; these attacks continue to enforce awareness and continue to make DatAlert very important part of our portfolio. Recently, a customer analyzed a brute force attack when DatAlert detected hundreds of accounts being locked out. During investigation we were able to familiarize them with some of our sophisticated features like how they could analyze past events with our behavior based threat model and this led an upsell opportunity. When customers operationalize DatAlert, we see how quickly it strengthens our relationship and improve our ability to sell additional products like Varonis Edge. Varonis Edge is our newest addition which enables enterprises to collate events and alerts from DatAlert to talk potential data leak and spot vulnerabilities at the point of entry. We are excited about our recent data security platform upgrades and features. Our result this quarter reinforced our belief and our strategy is working with. Our technology provides the platform to help prevent data breaches, reduce risk and achieve compliance; and our operational journey show our customer how to use our technology to it's fullest extent, help to focus on innovation, enable us to solve more of our customer data security needs and strengthen our relationship with them. This has driven our line and expense strategy and provides us a pass for a doable scalable goals over the long-term. I remain confident we have the strategy and team to build a $1 billion revenue business. With that, I will turn the call over to Guy. Guy?