Thanks, Yao, and good afternoon, everyone. I'm excited to welcome you to the Amplitude Q4 and 2023 earnings call. We have a lot to share today, and we're going to cover it in 3 main sections. First, our financial results for Q4 and 2023 overall. Second, the maturation of Amplitude in 2023, including an update on innovation and customer wins. And thirdly, our views on 2024. Let's start with the Q4 and full year financial highlights. Our fourth quarter revenue was $71.4 million, up 9% year-over-year. Annual recurring revenue was $281 million, up $8 million from the end of the third quarter. We've grown our customer base to more than 2,700. 511 of those customers pay us more than $100,000 per year, up from 480 at the end of 2022. We also have 39 who pay us more than $1 million a year, up from 30 at the end of last year. Lastly, we delivered almost 10 percentage points of non-GAAP operating margin expansion year-over-year. We also generated $1.5 million of free cash flow in Q4, and $22 million of free cash flow in 2023. Q4 was our largest quarter for net ARR in 2023 marked by broad-based growth across all customer sizes. It was also the largest quarter of new enterprise logo wins in the company's history. While total churn was still high, it was lower than previous quarters. 2023 was a big year for Amplitude. I'm proud of how the team delivered. First, we made great progress in stabilizing the business, focusing on what we can control, we delivered margin expansion and positive free cash flow even against slowing growth. Second, we launched our Plus plan in October, helping us to serve the lower end of the market much more effectively with a product-led growth motion. In doing so, we provided ourselves the ability to further uplevel our go-to-market efforts, which we initiated early this year. We are scaling our strategic sales efforts across different buyers, focusing on high potential accounts up and down the stack. We are targeting the lower end of the market with our product-led growth motion and using an inside sales team to address the in between. Third, we had our strongest year ever for product innovation. I've said before, this is the best way to drive value long term, so I'd like to recap a few key areas. I just mentioned our Plus plan, and we are off to a great start. It's early days on our own product-led journey. There is more to test and iterate on, but we like what we see so far. Plus is tracking ahead of an early internal expectations. There are almost no signs of cannibalization, and we continue to see 5-figure deals in the sign-up process. We previewed session replay with customers last year and launched it publicly 2 weeks ago. Session replay helps our customers reconstruct a user visit by capturing how they interacted with a website app or digital product. It's a tool used by product, marketing and data teams to understand user behavior, diagnose product issues and improve outcomes. Session replay is powerful because it is tightly integrated with Amplitude analytics and our broader platform. As a result, companies can get quantitative and qualitative insights to understand what their customers are doing and why. We are already getting strong feedback and encouraging early traction with customers already ripping and replacing point solutions with our session replay offering. They tell us they love being able to watch sessions without having to leave charts and that they are excited to do everything in one platform. As we continue to demonstrate with experiment and CDP, many workflows are better with Amplitude analytics at the core. In addition to Plus and Session Replay, we introduced a suite of AI-powered capabilities, including Ask Amplitude to shorten the learning curve when you're getting started and data assistant to make data governance effortless. We believe AI will dramatically improve the caliber of digital products and experiences. We also improved our CDP solution, bringing it close to parity with market leaders in terms of connections. This led to an increasing number of companies choosing the powerful combination of analytics, experiment and CDP as their starting point. We also released numerous product based explicitly designed to help us win simple and win the enterprise. It's easier to get started with Amplitude with dashboard templates for B2B, SaaS, media, FinTech and marketing analytics. Customers can now quickly send data to Amplitude in a low-code fashion. Personalized homepages deliver out-of-the-box insights to users right when they log in. Collaboration is a competitive differentiator for Amplitude and allows us to expand to different teams within the enterprise. We launched Team workspaces to make cross-functional collaboration even easier. Last but not least, we welcome Francois Ajenstat as our new Chief Product Officer in December. Many of you may recognize Francois from Tableau. He was there for 13 years and led the product organization. I have huge respect for the work Tableau has done in the data space and inspired a lot of Amplitude's owned approach. The same is true for Francois, he is a world-class product leader and an inspirational storyteller who helps Tableau scale to beyond $1 billion in ARR. I am thrilled he is joining us on the next phase of our journey. Let's turn our attention to customers. Q4 was the largest quarter for new enterprise logo wins in the company's history. We saw more traction with traditional companies, too. We both landed and grew with companies like Polaroid, CrossFit, iFit, Culvers, Lithia Motors, Rover, Crafton, Strava and SpartanNash. In Q4, Driveway, a Lithia Motors Company moved away from their existing analytics provider and went all in on Amplitude across their web properties. Ross Sherman, Driveway's VP of Digital Innovation told us that Amplitude was the best solution to iteratively improve Driveway's experience so they can meet customers in their moment of need. Buying or selling a vehicle online is an emotional decision. With Amplitude now positioned to ingest all of Driveway's web session telemetry, its team can easily understand customer insights and test new features. This will improve the customer life cycle, unlocking the full potential of its ecosystem. We also won a large aerospace company this quarter. Airlines rely heavily on this company's digital products to manage their most critical aerospace needs, including warranties, repairs and key safety updates. Every error results in unwanted ground time for aircraft which cost their customers millions of dollars per minute. Their team realized it needed to use data to better meet their customers' needs. It have been using a legacy MarTech solution for years but it lacked adoption, trust and relevance. In Q4, they turned to Amplitude. With Amplitude analytics, they will help customers better leverage their online portals, quickly dive into data related to critical issues and easily fix problems in a timely manner. We'll also aim to help them more effectively use their R&D dollars and improve road map prioritization. Another one, I'm excited about is with DFL Digital Sports, the subsidiary of Deutsche Fußball Liga, the German Professional Football League. DFL digital sports is rapidly growing, so it needed a new partner that could handle traffic spikes, connects the web and mobile experience and provide deep insights. In Q4, it chose Amplitude Analytics to help grow its global fan base. We'll be partnering with DFL digital sports to help them reach their most important acquisition goals, including conversion and audience creation and management. With Amplitude, they'll also be able to create personalized span engagements, investigate issues causing drop-off and discover new areas of opportunity. Let's talk about what's ahead for Amplitude this year. It is too early to signal an all clear on the macro environment, especially with layoffs persisting across our digital native heavy customer base. However, there is early evidence to suggest recent renewal cohorts are doing better. We are also starting to see clear examples of companies who are on stronger footing, starting to grow following their initial reset. While slower growth is our reality for this year, nothing has fundamentally changed about our long-term opportunity. Digital products and experiences will continue to proliferate. There's increasing recognition that legacy web traffic and marketing-centric approaches are no longer sufficient. We see continued validation that our strategic approach, a digital analytics platform with product analytics at its core is the right one to win in the long-term. We will continue to execute with urgency, drive product innovation aggressively and widen our lead over our competitors. We will continue to make bold strategic bets. This will all help to drive business growth towards the end of the year and set us up for greater success in the future. Here are the key areas of operational focus. We will continue to improve the effectiveness of our sales motion. We made substantial progress across the board last year, but there's plenty more to do to go from good to great. Our named account approach drives focus and prioritization. This increases our opportunity set materially. Targeted high-potential account dollars grew by 50%, while we almost have the number of accounts that we go after. We're leading with value and selling more strategically, everything from industry-specific use cases to more sophisticated account engagement. We will continue to elevate our platform value proposition. With experiment, CDP and now session replay, we offer an all-in-one digital analytics platform that enables teams to create products that adapt to users, not the other way around. We know that our customers want a single provider for all their analytics needs. We see many opportunities to grow cross-sell and displace point solutions. With Francois now on board, we expect that our pace of product innovation will be even more aggressive. I have been intentional about up-leveling accountability, maturation and execution at Amplitude throughout 2023. We are demonstrating progress. We will continue to drive profitable growth and invest for the future. At the foundation, our team remains persistent and adaptable. I'm optimistic about what we'll accomplish in 2024 and beyond. With that, thank you for your interest in Amplitude. I'd now like to turn it over to Criss to walk through the financial results.