Thank you, Annie and thank you all for joining us here today for our Q3 2021 earnings call. It's great to be here with all of you this morning. Our team is executing at a very high level and we delivered a very strong result for the quarter. As a result, we are pleased to raise our revenue guidance for the full year of 2021 to $135 million, representing a 45% growth year over year. Q3 was a strong quarter in which we achieved a number of new milestones. First and foremost, I'm proud and excited to report that in Q3, we saw our ARR exceeded $150 million just one year after we reached the $100 million ARR back in Q3 2020. Also in the quarter, our GAAP revenue increased 46% year over year to $35.6 million, this result exceeding our guidance. Q3 was a record quarter for us for both new customer acquisition and retention. Our customer base grew by 174 accounts, including the addition of amazing new logos across the diversity of industries, including Volkswagen Group, Toshiba Electronics, the London School of Economics, Royal Caribbean, Quest Diagnostics and News Crop Australia. Our most significant growth come in our largest and most strategic customer segment, those companies will generate more than $100,000 in ARR. In Q3, we set a new record, adding 25 additional $100,000 customers, an increase of 48% year over year. These critical segments now represent over 50% of our total ARR for the first time. We're seeing strong momentum as our expanding product portfolio is contributing to greater velocity in our London expand direct sales motion. In Q3, we set a new record for NRR improving from the previous high of 106% at the end of Q2 to 110% in Q3 in that critical customer segment of account with over $100,000 in ARR; we improved the NRR to 122%, up from 118% in Q2, also a new record high. Those improvements are driven by expanding usage of our products as well as by our customers who purchased more than one of our digital intelligence solutions. As you know, we offer a complete suite of digital intelligent solutions, supporting a wide variety of use case for digital marketing, sales, market research, e-commerce strategy and alternative data for investors. Today, more than two-thirds of all of our customers are purchasing more than one solution. As an example of how our portfolio strategy is helping to drive deeper customer penetration. In Q3, we completed one of the largest bids in Similarweb history, a combination of up-sell and cross-sell with a major multinational Internet technology company. This was a seven figure addition to our existing relationship; making this the second consecutive quarter we have been able to announce an ARR contract of this size. This customer will be using four of our five digital intelligence solutions, representing a total of $6.5 million ARR contract. I want to focus for a minute on one of our five solutions, our new Shopper Intelligence offering. It is exciting and differentiation solution and we are seeing some amazing early success with it. Shopper Intelligence delivered powerful insight into e-commerce activity online marketplaces, enabling our customers to optimize their performance by revealing browsing and buying behaviors across online marketplaces. Our insights help them to shape their online sales strategies by optimizing product portfolios, benchmarking the competition and improving sales and advertising performance. When we launch our digital marketing and digital research solution, it took us four years to get to our first seven figure deal. With Shopper Intelligence, it took us just three months. And in Q3, we signed our first seven-figure ARR deal for the Shopper Intelligence. And here are a few examples of how our customers use Shopper Intelligence. A large North American retailer reported that Shopper Intelligence helped them remain a product to better align with search behavior, resulting in a 20% increase in sales. In Q3, we completed a two-year deal of $600,000 with this customer. Also in Q3, Shopper Intelligence helped us win with the consolidative specialized in CPG. The deal expands our business with this customer by 6x to $360,000 ARR contract. This customer use Similarweb in a sales process to target and teach new customers as well as advising its CPG's customer to optimize their partnership with a big box retailer. The customer has also agreed to be a referral partner for us and is now recommending Similarweb to its own direct customer. One more solution that is growing nicely is our self-intelligent solution that helps B2B companies that sell to digital players like e-commerce, digital publisher and digital advertisers. And for example, Postscript is a leading SMS platform that enables e-commerce to communicate and engage with customers for text messages marketing. Postscripts needed to improve and automate its account targeting and lead generation, which was labor and time intensive. By implementing Similarweb self-intelligence solution, the company now has access to Similarweb e-commerce database in every region, automatically can segment and prioritize e-commerce lead and integrate them directly into sales force. The result was increase in target account pipeline of 27% within just the first month. In Q3, we continue to make smart product investment to enhance our solution portfolio and make it stickier. Year over year, we doubled the size of our engineering team. And in Q3, we delivered hundreds of improvement across our portfolio of digital intelligence solution that includes major functional advancements in our competitive insight, killer strategy and advertising intelligent feature and to name a few. These improvements are driving more customer value and increasing our product stickiness, which reflecting in our consistently improving NRR number. It also reflects in the way our customers use our solution, incorporating them directly into their business workflow. Indirect channels, referral partners, affiliate resellers and OEM are a new area expansion for our business. For example, in September, we announced that we had been selected by Google to power its new market finder's service. Market finders help small and medium-sized businesses targets and grow into new global markets. The service leverages Similarweb data to analyze the company export potential, delivering an automated score along with customized and actionable recommendation to kick-start an international expansion plan. Google has told us that it was the unique accuracy of our digital data and insights and in our data edge that filled their decision to integrate with us. The win with Google reflects our growing relationship and also representative of the increased potential we see to build an OEM relationship, where partners include our data and insight in their own product offering. We also saw channel growth outside of OEM. In fact, Q3 was the first quarter in which our reseller outside of Japan contributed more than $1 million in new business. Overall, we have a strong opportunity for our indirect business and we plan to increase our investment in this area. Our data and insights are recognized by our customers, companies like Google and Postscripts while referred today as well as by the industry more broadly. In fact, last month, we were recognized by the hedge week as the best alternative data provider in the 2021 America's Award. So over 10 years, we have been working on solving the incredibly challenging problem of measuring digital behavior. We invest significant resources in our data assets and acquisition and we build an amazing R&D team of top notch data scientists and engineers. Those investments and technology are very difficult to replicate. We are proud of and confident in our data hedge and we have differentiated ourselves on the reliability and comprehensive of our data, but we are always looking to innovate and improve on our measurement and insight creation. That's why today, as you may have seen, we announced the acquisition of MD Mobile, a San Francisco-based mobile insight provider and market leader in mobile audience analytics, consumer panels and mobile sampling. We've been partner of MD for over a year. So we know them very well and we have been very impressed with the quality and depth of the data. MD measurement approach is backed by a large-scale meter panel of highly engaged optimism. This approach complements our existing measurement strategies and will enable us to enhance our mobile intelligence offering with more granular data and more powerful use case. Beyond this, we believe that MD will position us to introduce exciting new market research capabilities in the future. We welcome the MD team to the Similarweb family and we are looking forward to working together with them to advance the stage of the art in the digital measurement. In general, we continue to benefit from the strong circular plan for digitization in our markets. Digital has become a preferred way to interact, contract and deliver products and services; it is an important growth driver and strategic focus for most businesses today. Digital markets are highly competitive and almost every player is looking for advantage. Our digital intelligence solutions give our customer and edge data and insight that enables them to understand their market better than their competitors take action faster and win. The more the company shifts their business and become dependent on digital, the more mission-critical our offering becomes. Those trends are driving our strong growth and reinforcing our confidence in our opportunity, our strategy and the investment we are making in our future. We have massive market opportunity, which we believe today is approximately $34 billion of solution target, the most essential revenue-driven operation of our customers, sales marketing, e-commerce and three suites and we sell across a wide variety of industries, ranging from financial services to retail, travel, CPGs to media and many more. To summarize, we continue to execute successfully on our strategy. Since our IPO, we reached the $160 million ARR milestone nearly three months ahead of our plan and we have delivered two consistent quarters of strong revenue growth, both norths of 45%. We have grown our indirect channels and we expand our data edge both organically and through acquisition in Q2 and Q3. We introduced a new product and features that expand our TAM and proving our ability to monetize those with significant new and upsell deals. Our combination of strong revenue growth and outstanding gross margin put us among a small group of best-in-class fast companies in the world and we are very proud of this achievement. Finally, our execution and growth would not be possible without as a member of our global team, each of whom works hard to achieve those results. We've built a top-class recruiting machine and drive and support our growth. We are currently signing new hires at the rate of 50 new employees per month. I'm very happy that earlier this week, DNB recognized us as one of the top 30 tech companies to work in England. Overall, I'm pleased with the way our team continued to execute and our focus on helping our customers succeed and win in digital world. We're heading into Q4 with tremendous amount of energy and momentum, as you can see by our raising our guidance. And as I like to say, we are just getting started. With that, I will turn it over to Jason, our CFO, to review the financials. Jason?