What was the growth rate of Veritone's advertising revenue in Q4 compared to Q4 of 2019
s depend on us to deliver the growth, cost savings, and efficiencies that come with the adoption of our AI platform and cognitive engines. Third, Veritone is a run-anywhere-and-everywhere solution.
Today, aiWARE operates in both AWS and Azure, including our aiWARE Government FedRAMP-certified version. We are also deployed and processing data on the edge and our customers' on-premise data centers. We expect our support of NVIDIA CUDA and EGX to further expand our deployment and use cases into the IoT realm. The symbiotic relationship between Veritone's aiWARE operating system and NVIDIA's advanced processors follows a proven path for success and is reminiscent of the Wintel relationship that dominated the computational computer revolution.
Finally, aiWARE is an open standard-driven OS, a model whose success has been proven time and time again. Just think of Windows over Mac, Linux over Solaris, or even Android over iOS. The largest and most vibrant ecosystems have always been built on open standards. We see aiWARE unlocking several successive levels of value for customers, measured in orders of magnitude on a logarithmic scale.
I look forward to discussing this more in our Inaugural Technology Expo in May. Veritone is quickly maturing as a company in forced in the AI revolution with our management team and go-to-market efforts finding their rhythm. This stability gives me comfort, and more importantly, a strong platform to continue to innovate and make calculated bets on exciting new opportunities. With that, I would like to now hand the call over to Ryan, our president and co-founder, to discuss our operational achievements in greater detail.
Over to you, Ryan.
Ryan Steelberg -- President
Thank you, Chad, and good afternoon, everyone. As Chad mentioned, we had a very strong fourth quarter and finish to our exceptional year. In every area, we delivered results above the expectations we had set when we spoke with you in November. Our SaaS revenue grew by 53% year over year in Q4 and by more than 30% for the full year.
Our GLC and energy markets were the strongest contributors, just as they were in Q3. I also want to call out our exceptional performance of our advertising team. Fueled by the insights and differentiation enabled by aiWARE, this team massively outperformed its peers throughout 2020. Advertising revenue, including the contribution of our VeriAds network grew by over 50% in Q4 compared with Q4 of 2019.
During a year in which many ad budgets were slashed, Veritone showed marked increases in spend from many of our clients, including DraftKings, Purple, HelloFresh, and others. Throughout the year, as customers continue to recognize the differentiated results we provide through aiWARE, we increased gross billings per active customer. Entering 2021, Veritone is currently delivering AI solutions to thousands of customers. We are addressing large and complex problems for our federal government and we are leveraging the same architecture to enhance and augment workflows for hundreds of organizations.
Some of these engagements are multiyear and several million dollar contracts and others can be as little as a few hundred dollars a month, truly democratizing AI and machine learning and delivering it to a much more expansive market. The flexibility, scalability, and performance of the aiWARE operating system enables Veritone, our partners and third-party developers to rapidly create and deploy cognitively driven solutions into virtually any industry. And so we believe that Veritone's market opportunity is substantially larger than other providers. This past quarter, we announced partnerships with NVIDIA and Alteryx, aiWARE is a complementary technology that extends and accelerates AI adoption and efficacy by providing a cognitive OS that unifies big data platforms, advanced processing power and end-user applications into a single holistic solution.
Our relationship with NVIDIA truly extends aiWARE everywhere. We've already realized accelerated processing speeds in the cloud through our integration with NVIDIA's CUDA GPUs 
s depend on us to deliver the growth, cost savings, and efficiencies that come with the adoption of our AI platform and cognitive engines. Third, Veritone is a run-anywhere-and-everywhere solution.
Today, aiWARE operates in both AWS and Azure, including our aiWARE Government FedRAMP-certified version. We are also deployed and processing data on the edge and our customers' on-premise data centers. We expect our support of NVIDIA CUDA and EGX to further expand our deployment and use cases into the IoT realm. The symbiotic relationship between Veritone's aiWARE operating system and NVIDIA's advanced processors follows a proven path for success and is reminiscent of the Wintel relationship that dominated the computational computer revolution.
Finally, aiWARE is an open standard-driven OS, a model whose success has been proven time and time again. Just think of Windows over Mac, Linux over Solaris, or even Android over iOS. The largest and most vibrant ecosystems have always been built on open standards. We see aiWARE unlocking several successive levels of value for customers, measured in orders of magnitude on a logarithmic scale.
I look forward to discussing this more in our Inaugural Technology Expo in May. Veritone is quickly maturing as a company in forced in the AI revolution with our management team and go-to-market efforts finding their rhythm. This stability gives me comfort, and more importantly, a strong platform to continue to innovate and make calculated bets on exciting new opportunities. With that, I would like to now hand the call over to Ryan, our president and co-founder, to discuss our operational achievements in greater detail.
Over to you, Ryan.
Ryan Steelberg -- President
Thank you, Chad, and good afternoon, everyone. As Chad mentioned, we had a very strong fourth quarter and finish to our exceptional year. In every area, we delivered results above the expectations we had set when we spoke with you in November. Our SaaS revenue grew by 53% year over year in Q4 and by more than 30% for the full year.
Our GLC and energy markets were the strongest contributors, just as they were in Q3. I also want to call out our exceptional performance of our advertising team. Fueled by the insights and differentiation enabled by aiWARE, this team massively outperformed its peers throughout 2020. Advertising revenue, including the contribution of our VeriAds network grew by over 50% in Q4 compared with Q4 of 2019.
 During a year in which many ad budgets were slashed, Veritone showed marked increases in spend from many of our clients, including DraftKings, Purple, HelloFresh, and others. Throughout the year, as customers continue to recognize the differentiated results we provide through aiWARE, we increased gross billings per active customer. Entering 2021, Veritone is currently delivering AI solutions to thousands of customers. We are addressing large and complex problems for our federal government and we are leveraging the same architecture to enhance and augment workflows for hundreds of organizations.
Some of these engagements are multiyear and several million dollar contracts and others can be as little as a few hundred dollars a month, truly democratizing AI and machine learning and delivering it to a much more expansive market. The flexibility, scalability, and performance of the aiWARE operating system enables Veritone, our partners and third-party developers to rapidly create and deploy cognitively driven solutions into virtually any industry. And so we believe that Veritone's market opportunity is substantially larger than other providers. This past quarter, we announced partnerships with NVIDIA and Alteryx, aiWARE is a complementary technology that extends and accelerates AI adoption and efficacy by providing a cognitive OS that unifies big data platforms, advanced processing power and end-user applications into a single holistic solution.
Our relationship with NVIDIA truly extends aiWARE everywhere. We've already realized accelerated processing speeds in the cloud through our integration with NVIDIA's CUDA GPUs 