Jayshree Ullal
Analyst · the Arista website following this call. I will now turn the call over to Mr. Chuck Elliott, Director of Investor Relations. Sir, you may begin
Thank you, Chuck. Thank you, everyone, for joining us this afternoon for our Q3 2015 earnings call. I am pleased to report our sixth consecutive beat as a public company. Consistent with prior quarters, customer demand for our 7000 Series, the U.S.-based products drove results that exceeded the consensus.
From a geographic perspective, our customers in the Americas generated 78% of our sales, and 22% was derived internationally from the EMEA and Asia-Pacific theaters. We are witnessing balanced traction across our familiar 4 verticals: our Cloud Titans, Financials, High-Tech Enterprises and Web and Service Providers.
Revenue grew 40% year-over-year to a record $217.5 million. Service contributed in the double digits at 11% of overall revenue, including software subscriptions. We delivered non-GAAP gross margin of 65.5%, resulting in a non-GAAP earnings per share of $0.59, thus growing EPS in excess of 40% year-over-year in our competitive and dynamic industry.
We now have over 3,500 customers with our continued trend of 1 to 2 new customers per day.
This quarter, we had a number of key highlights. Our progress with the HP partnership via demonstrations at VMWorld 2015 of converged solutions with HP Openview continues. We introduced next-generation leaf switch platform based on Broadcom's much anticipated Tomahawk silicon for flexible 10, 25, 40, 50 and 100-gigabit Ethernet switches, with hitless Smart System Upgrade capabilities. Our new products were endorsed by a number of our ecosystem partners at an NYC event we held on September 14, 2015. We do expect the next year to fuel the demand for 25, 50 and 100-gigabit Ethernet upgrades.
We unveiled a strategic security architecture for cloud networking called Macro-Segmentation Services, or MSS for short. Our CloudVision MSS has been endorsed by many new and existing security leaders, including VMware, Palo Alto Networks, F5, Check Point and Fortinet. MSS delivers improved risk mitigation and compliance and enables a new unified firewall policy for both physical and virtual worlds, utilizing the rich programmability of Arista EOS.
Speaking of partners, we have strong supporters of open source community initiatives, such as Microsoft's ACS and HP's Open Switch, both are setting examples of the open source stacks familiar to what Facebook's FBOSS was announced last year, and they complement our award-winning EOS. In Q3, TechTarget also recognized us with an innovation award for Arista EOS.
This month, we formalized the technical advisory board at SMPTPE ( sic ) [ SMPTE ] 2016 Society of Motion Picture and Television Engineers for media and entertainment with the participation of Fox and Imagine among many important industry participants. We believe the migration from analog broadcasting to digital IP is a very important development for modern workstream.
As we witness the mega consolidation of large IT suppliers, many of my blogs and prior predictions ring true. New nimble pioneers like Arista are leading the transformation from legacy and closed systems to this third wave of open cloud and converged platforms. Arista has been a thought leader of this throughout, and follows a strategic imperative from customers to shift from siloed IT to universal and programmable clouds.
As we reflect our midyear 2015 market data report, Arista's evolution and leadership in market share has grown from single-digit 7% in mid-2013 to double-digit 12% in mid-2015 in the relevant 10, 40 and 100-gigabit data center switch port category. Clearly, we are outpacing the industry average growth. We feel poised to accomplish $1 billion run rate next year, a year earlier than originally predicted.
In summary, I would like to say that I'm pleased with our differentiated cloud assets and overall class team to achieve this. It positions us uniquely in the year and the decade ahead.
Ita, I'd now like to turn it over to you, our CFO, for Q3 2015 financial detail.