Good afternoon and welcome to Samsara's third quarter fiscal 2025 earnings call. I'm Mike Chang, Samsara's Vice President of Corporate Development and Investor Relations. Joining me today are Samsara's Chief Executive Officer and Co-Founder Sanjit Biswas and our Chief Financial Officer Dominic Phillips. In addition to our prepared remarks on this call, additional information can be found in our shareholder letter, press release, investor presentation, and SEC filings on our investor relations website at investors.samsara.com. The matters we'll discuss today include forward-looking statements. Actual results may differ materially from those contained in the forward-looking statements and are subject to risks and uncertainties described more fully in our SEC filings. Any forward-looking statements that we make on this call are based on assumptions as of today, December 5th, 2024, and we undertake no obligation to update these statements as a result of new information or future events unless required by law.
During today's call, we will not discuss our third quarter fiscal 2025 financial results. We'd like to point out that the company reports non-GAAP results in addition to and not as a substitute for or superior to financial measures calculated in accordance with GAAP. Reconciliations of GAAP to non-GAAP financial measures are provided in our press release and investor presentation. We'll make opening remarks, dive into highlights for the quarter, and then open the call up for Q&A. With that, I'll hand over the call to Sanjit.
Thanks, Mike, and thank you everyone for joining us today. Samsara delivered another strong quarter of durable and efficient growth. We ended Q3 with $1.35 billion in ARR, growing 35% year over year. We also delivered a quarterly record 10% adjusted free cash flow margin. Our growth is powered by our deep partnerships with the world's largest and most complex operations organizations. In Q3, we added 170 customers with more than $100,000 in ARR, our second highest quarterly additions ever. This includes major customer wins with large organizations like Papa John's, the world's third largest pizza delivery company, a Fortune 500 confectionery, food, and beverage company, and a Fortune 1000 network of full-service medical equipment companies. As we continue to grow, we're excited about the innovation that we're unlocking with more scale.
This includes better AI models and benchmarking, stronger customer feedback loops to better understand our customers' challenges, and more R&D dollars to invest in technology. Our customers provide the mission-critical infrastructure that keeps the world running. They have asset-heavy and labor-intensive operations. We're partnering with them to digitally transform their organizations. Our growing data asset feeds our AI-powered platform, which delivers insights to our customers so they can improve their operations. This translates to clear and fast ROI with payback periods often measured in months. In a recent survey with the IDC, they estimated that Samsara customers realized $2 million of savings on average per customer per year. This equates to more than eight times ROI. Typical savings include lower insurance premiums and payouts, improved fuel efficiency, lower maintenance costs, better asset utilization, improved worker hiring, and retention.
As our customers achieve ROI, they often expand with us for even more savings. I'd like to share two examples of customers that have realized clear and fast ROI. They both expanded this quarter and have had multiple expansions since becoming customers. Comfort Systems is a Fortune 1000 company that provides heating, ventilation, air conditioning, and electrical contracting services. Their operations span over 170 locations with over 40 operating units and over 18,000 employees. Comfort Systems prioritizes safety as a core value and is committed to a zero-harm work environment. With Samsara, they achieved an 85% reduction in vehicle safety events and a 72% reduction in speeding in just six months. They are now a top 25 customer and have had nine expansions since becoming a customer in 2022. In Q3, they added Asset Tags and expanded with more of Samsara's Video-Based Safety, Telematics, and Equipment Monitoring.
They're using Asset Tags to track high-value, smaller equipment on job sites like scissor lifts, welders, and pipe machines. They're also using Asset Tags to improve their asset utilization. Next, let's turn to a Fortune 500 global company that provides water, hygiene, and infection prevention solutions and services. They have 48,000 employees and 11,000 light-duty vehicles to support nearly 3 million customer locations worldwide. They became a customer in 2021 and have had 11 expansions with us. They're using our Video-Based Safety and Telematics applications across two of their divisions. We've also identified additional expansion opportunities in five more divisions. They have decreased harsh driving events by 37% using Samsara's Video-Based Safety application. In a pilot this year, they also reduced severe speeding by 48% and decreased forward collision warning events by 50% with in-cab alerts.
We are proud to partner with our customers to make a real-world impact on their operations. AI is amplifying our impact on the safety, efficiency, and sustainability of our customers' operations. We recently surveyed over 1,500 leaders in physical operations in our State of Connected Operations Report. We found that AI-driven advancements are fundamentally reshaping how these organizations operate. 87% reported that they are planning to increase AI investments in the coming year. They reported many benefits of AI. 45% cited improvements in safety. 45% highlighted enhanced data and analytics capabilities, and 43% reported gains in operational efficiency. These findings show the powerful role AI will play in the future of connected operations. To bring more AI to our customers, we announced Samsara Intelligence earlier this week. It is an expanded suite of AI offerings that helps teams make smarter decisions and run safer, more efficient operations.
Samsara Intelligence is trained on our expansive data set, which has great scale and breadth. We now process more than 10 trillion data points and 70 billion miles driven annually. Our data spans a broad and diverse group of asset types, end markets, data types, and geographies. Our customers face tough challenges, and our AI models use this data to help them solve real-world use cases. Samsara Intelligence includes Samsara Assistant and Intelligent Experiences. Samsara Assistant is an interactive generative AI tool that provides instant answers to their operational questions. It improves the safety, maintenance, and compliance of our customers' operations. Some examples include identifying vehicles with severe fault codes and receiving step-by-step instructions to resolve them. Spotting time-sensitive disruptions in daily operations like unexpected stops, which might signal a driver is at risk or in need of assistance.