Good day, and thank you for standing by. Welcome to the Twilio Inc. Fourth Quarter 2024 Earnings Conference Call. At this time, all participants are in a listen-only mode. After the speaker's presentation, there will be a question-and-answer session. To ask a question during this session, you'll need to press star 11 on your telephone.
You will then hear an automated message advising you your hand is raised. To withdraw your question, please press star 11 again. Please be advised that today's conference is being recorded. I would now like to hand the conference over to your speaker today, Bryan Vaniman, SVP of Investor Relations and Corporate Development. Please go ahead.
Good afternoon, everyone, and thank you for joining us for Twilio's Fourth Quarter 2024 Earnings Conference Call. Joining me today are Khozema Shipchandler, Chief Executive Officer, and Aidan Viggiano, Chief Financial Officer. As a reminder, we will disclose non-GAAP financial measures on this call.
Definitions and reconciliations between our GAAP and non-GAAP results can be found in our earnings release and our earnings presentation posted on our IR website at investors.twilio.com. We will also make forward-looking statements on this call, including statements about our future outlook and goals. Such statements are subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those described.
Many of those risks and uncertainties are described in our SEC filings, including our most recent Form 10-Q and our forthcoming Form 10-K. Forward-looking statements represent our beliefs and assumptions only as of the date such statements are made. We disclaim any obligation to update any forward-looking statements except as required by law. With that, I'll hand it over to Khozema and Aidan, who will discuss our Q4 and 2024 results, and we'll then open the call for Q&A.
Thank you, Bryan. Good afternoon, everyone, and thank you for joining us today. Twilio had a terrific Q4, reaching $1.195 billion in revenue, an 11% increase year over year, and our second consecutive quarter of double-digit growth. Q4 also marked an important milestone for Twilio, as it's the first time we've delivered quarterly GAAP operating profitability in the company's history, well ahead of our initial target.
For the full year, we generated $4.458 billion in revenue, representing 9% organic growth year over year. Over the past two years, we've dedicated ourselves to transforming Twilio's business from one primarily focused on growth to one that balances innovation, growth, and profitability. Our results demonstrate the success of those efforts.
Not only have we recently accelerated revenue growth, but we've also significantly boosted our non-GAAP profitability while meaningfully accelerating our path to GAAP profitability, plus reducing our net burn rate and outstanding share count. And we've increased annual free cash flow by nearly $1 billion since 2022.
All of this illustrates our commitment to operating the company with more discipline, rigor, and focus. And while there's more work to be done, the results speak for themselves. At our Investor Day a few weeks ago, you got a chance to hear about the new Twilio, including our product strategy, growth levers, and financial framework that we have in place to win a much larger addressable market.
As marketing, sales, and customer support converge into customer experience as a service, we strongly believe that Twilio's leading communications platform, plus contextual data powered by Segment and our innovations with AI, position us to win in this massive market and reinforce our vision that every digital interaction we power between brands and consumers is nothing short of amazing.
While we provided a lot of details during our Investor Day, today I wanted to take the opportunity to reinforce a few of the key takeaways while also sharing some of the highlights from Q4. On the innovation front, in 2024, we launched 251 products, enhancements, and services. These innovations align to our strategy of building a trusted, simple, and smart platform that enables brands to drive more secure, relevant, and personalized interactions with their customers.
Throughout the quarter, we continued to invest in our core capabilities to drive even greater customer value. During Cyber Week, Twilio powered more than 5 billion messages, delivered more than 65 billion emails, and supported 678 million calls, all while delivering 100% uptime. The confidence our customers have in Twilio is stronger than ever, and critical periods like Cyber Week proved to our customers that Twilio has the trusted, simple, and smart platform that they need.
During the fourth quarter, we expanded our trusted channels to meet our customers' evolving needs by adding new capabilities to support existing channels, including RCS and WhatsApp. For RCS, we also recently announced that rich content cards, media, and rich card carousels are now available and supported by our Content Template Builder that helps streamline development. RCS is proving a valuable expansion vehicle for existing messaging customers.
Customers like MarketBeat are able to benefit from Twilio's streamlined approach to development on a single messaging API and our universal template management system. It's also clear that Twilio continues to be at the center of the AI value chain, as we already have 90% of the Forbes 50 AI startups building on Twilio.
We continued to drive ROI with our AI-enabled products, benefited from emerging AI companies that chose Twilio as an essential component for their customer engagement layer, and partnered with key AI players in the ecosystem like AWS, Databricks, Google Cloud, OpenAI, and Snowflake.
In Q4, Conversation Relay, which helped simplify the process of building robust AI voice agents, went into public beta. While it's still early, we believe that AI will drive a renaissance in voice, and everyone from enterprises to startups will begin orchestrating new voice experiences that are two-way and personalized.
On the Segment front, the AI innovations that went live throughout 2024 are beginning to generate tangible results for our customers. As an example, with Predicted Audiences, one company realized a 70% improvement in audience accuracy, and in Q4 found an average of four weeks of data science time saved by giving marketers the ability to predict behavior. Emerging AI startups are continuing to build on Twilio.