Arista Networks, Inc. is an American computer networking company specializing in software-driven cloud networking solutions for data centers, high-performance networking for cloud computing, high-performance computing (HPC), and high-frequency trading environments, and AI-driven solutions for high-speed connectivity. Founded in 2004, the company designs and sells multilayer network switches that enable software-defined networking (SDN), offering low-latency cut-through Ethernet switches supporting speeds from 10 to 800 gigabits per second. Arista's flagship product is its Extensible Operating System (EOS), a Linux-based network operating system that provides advanced programmability, automation, and scalability across all Arista products, allowing seamless integration with cloud and AI workloads.

Headquartered in Santa Clara, California, Arista has grown into a key player in the networking industry, competing with giants like Cisco and Juniper. The company went public in 2014 on the New York Stock Exchange under the ticker ANET, and its innovations in Ethernet switching have been pivotal for hyperscale data centers operated by major tech firms. Arista emphasizes open standards and merchant silicon, differentiating itself from proprietary hardware approaches, which has earned it recognition for reliability and performance in demanding applications.

Arista's solutions are widely adopted by leading cloud providers, financial institutions, and research organizations, contributing to its reputation for delivering stateful switch platforms that support network telemetry, security, and orchestration. With a focus on innovation, the company continues to expand its portfolio to address emerging needs in AI networking and 400G/800G Ethernet deployments.