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 2015 and Q4 earnings call. I am pleased to report that we had a spectacular year with a strong finish. Annual revenue grew 43.4% year-over-year to a record $837.6 million while earnings per share increased 52.8% to $2.44. This was driven by our innovative platforms, differentiated EOS stack and CloudVision orchestration. Services contributed 11.1% of overall sales as cloud demand fueled our growth across our top verticals, especially the cloud titans. From a geographic perspective, our customers in the Americas contributed 76.8% of total revenue in 2015 as our international theaters progressed steadily. We delivered non-GAAP gross margins of 65.3% for the year as we grew profitability in a highly dynamic and competitive industry.
We are now in excess of 3,700 cumulative customers, including new customer upticks and expansion from our existing customer base.
Microsoft was 12% of our 2015 revenue, symbolic of the continued shift we see from on-premise enterprise to workloads in the public cloud.
We remain fully committed to significant R&D and customer support investments, often in conjunction with our key technology partners to bring open, industry-wide cloud conversions.
Let me quickly recap some of our 2015 highlights. Early in the year, we announced 26 new leaf and spline [ph] platforms for 10, 25, 40, 50 and 100 gigabit ethernet, all based on our single binary image EOS philosophy, utilizing diverse silicon architectures.
In May 2015, we achieved the coveted leaders quadrant with one other vendor in Gartner's Magic Quadrant for data center networking out of the 11 vendors mentioned.
We forged a key agreement with HP for conversion for structure of compute and storage integrated by HP OneView and Arista EOS.
We introduced a revolutionary platform, CloudVision, for workload provisioning and workflow automation, offering interoperability across overlays like VMware NSX as well as integration into Dell, HP and OpenStack frameworks.
Later in the summer, we extended CloudVision to security with Macro-Segmentation Services, or MSS for short. Holistic security is a top-of-mind customer mandate, and we are working well with security visionaries like Palo Alto Networks, Check Point, F5, Fortinet and VMware to realize it.
In fall of 2015, we launched our media and entertainment initiative with industry leaders, transforming the once analog world to a highly digitized, software-defined and IP one.
In November of last year, we delivered our first spine Internet booking solutions connecting between data centers with Layer 1, Layer 2 and Layer 3 options endorsed by our leading customers: Box, Equinox [ph] and Netflix.
Earlier this year, in January of 2016, we announced a foundational Arista EOS infrastructure with NetDB, a network-wide, state-oriented database. NetDB builds upon our core state architecture by adding network-wide actions including state-sharing mechanisms for control, replication, rollback and streaming analytics.
We also announced use cases for hybrid cloud, Docker container support and more programmability models with OpenConfig and Go.
All of these are compelling examples and alternatives to the traditional world we all live in.
Demonstrably, we have had a busy year, growing our employee strength to over 1,200 with worldwide investments across 70 countries and 120 support people. And as we enter the new 2016 fiscal year, we believe we are gaining market share and increased relevance in the cloud networking segment.
We are the only authentic state-based cloud stack, differentiated from mega-scale networking. Others may mimic us with marketing, buzzwords and architectures. We simply execute and deliver.
We believe our publish-subscribe-notify is simply several years ahead of the industry, and I couldn't be more proud of our customers' steadfast acceptance of Arista as well as our team's results.
Now I will turn it over to Ita for Q4 and 2015 financial details.