If you'd like to ask a question, please use the raise hand feature located in the menu at the bottom of your screen. In addition, please ensure your Zoom name reflects your full name and the firm that you are with. And if you're joining via phone, you may press star nine to ask a question. And please note today's call is being recorded. Now, I'll be standing by should you need any assistance, but for now, it is my pleasure to turn things over to Kelsey Turcotte . Kelsey, over to you.
Good afternoon. We appreciate you joining us for GitLab's fourth quarter fiscal year 2025 financial results conference call. With me are Bill Staples, our CEO, and Brian Robbins, our CFO. During this afternoon's call, we will provide an overview of the business, commentary on our fourth quarter results, and guidance for the first quarter and fiscal year 2026. Before we begin, I'll cover the Safe Harbor statement. I would like to direct you to the cautionary statement regarding forward-looking statements on page two of our presentation and in our earnings release issued earlier today, both of which are available under the investor relations section of our website. The presentation and earnings release include a discussion of certain risks, uncertainties, assumptions, and other factors that could cause our results to differ from those expressed in any forward-looking statements within the meaning of the Private Securities Litigation Reform Act.
As is customary, the content of today's call and presentation will be governed by this language. In addition, during today's call, we will be discussing certain non-GAAP financial measures. These non-GAAP financial measures exclude certain unusual or non-recurring items that management believes impact the comparability of the periods referenced. Please refer to our earnings release and presentation material for additional information regarding these non-GAAP financial measures and the reconciliations to the most directly comparable GAAP measure. I'll now turn the call over to Bill. Bill.
Thank you, Kelsey, and good afternoon, everyone. Thank you for taking the time to join us today on our fourth quarter earnings call. Before I get any further into the call, I want to take this opportunity to welcome Ian Steward to GitLab in the role of CRO. He will join us later this quarter from Tricentis, where he currently serves as CRO. Ian has spent his career driving revenue growth with a strong analytical and operational bias and brings a wealth of experience in helping developers and IT organizations realize value. I am thrilled Ian is joining the company and will help drive GitLab through our next growth stage. I also want to thank Ashley Kramer for her service as interim CRO over the past few quarters.
Ashley will remain in the interim CRO role through the end of Q1 FY 2026 and will work with Ian to ensure a smooth leadership transition and will then pursue opportunities outside of GitLab. Turning back to the quarter, Q4 was a strong finish in FY 2025, continuing the momentum GitLab has built throughout the year, driven in part by Ultimate, Dedicated, and GitLab Duo. Fourth quarter revenue increased 29% year over year to $211 million, once again coming in ahead of our expectations, and consistent with our commitment to responsible growth, our non-GAAP operating margin reached 18%. This is an increase of 960 basis points year over year. Brian will give a deeper dive into the quarter and provide guidance for Q1 and fiscal year FY 2026 in just a moment.
But first, let me step back and share what I've learned in my first quarter at GitLab and how we're approaching the opportunity ahead. I spent most of my time this quarter meeting with customers, investors, and team members, learning everything I could. I engaged with more than 50 customers, including Booking.com and USAA, and listening to how GitLab uniquely accelerates their team's ability to deliver secure software faster. Three key themes emerged from those conversations. First, GitLab's comprehensive platform approach drives enormous productivity and efficiency improvements with very clear ROI. Second, the momentum around DevSecOps and specifically the need for security responsibilities to shift left. We believe every engineer needs to understand and be part of delivering secure software, and AI is only going to accelerate that trend.
Finally, every customer, even those who admitted they were skeptics just a few quarters ago, are actively evaluating AI tools and exploring how they can benefit by incorporating AI into their DevSecOps strategy. As we brainstormed their AI strategy together, it became even more clear how our customers bet on GitLab will become a competitive advantage for them and the foundation for a successful AI strategy in the years to come. Nearly every customer I spoke with feels it. With the power of generative AI for code creation, we're almost certainly going to see a significant increase in both software creators and code in the coming years. We believe organizations won't just have more developers. They'll have more production-ready code generated by AI and more applications built and deployed by agents.
As with any software, this code will need to meet the quality, security, privacy, and compliance requirements of the business. A successful AI strategy, therefore, depends on a successful approach to managing the software lifecycle at scale, something GitLab is already proven to do better than anyone else in the category. Organizations who have already adopted or are in the process of moving to GitLab and taking a platform approach benefit from automated security scanning, enforceable compliance guardrails, and standardized workflows, not only with their human developers, but for agent-generated code as well. We believe organizations without an integrated DevSecOps approach will struggle to manage the complexity and potential risk of agentic AI development.
For organizations that want to leverage the benefits of AI agents while delivering a safe and reliable experience for their customers, we believe the best path is to standardize on an end-to-end DevSecOps platform, and GitLab offers the most comprehensive DevSecOps platform today. I spent a lot of time this quarter meeting team members around the world and at every level of the organization. I heard their commitment to our values, their passion for both the people and the mission of GitLab, and the many things we're doing well today as a company. I also heard the typical growing pains of a public company at our age and maturity, and the desire to go faster with less friction so we can scale to become a defining generational company in our category.