Arista growth beats Cisco as multiple hits 43.8x

The comparison sits on more than a growth gap. Arista has become deeply embedded in hyperscale cloud and AI fabrics, and its software-led operating model produces margins more typical of software than networking hardware — non-GAAP operating margin reached 49.9% and non-GAAP EPS rose about 40% in the second quarter. That is the foundation of the premium, but it is also the source of the bear case: a relatively small number of cloud customers drive a large share of demand.

Cisco, meanwhile, is no longer merely a defensive networking incumbent. Its AI infrastructure revenue was roughly $4 billion in fiscal 2026 and is expected at about $7.5 billion in fiscal 2027, alongside networking product orders up 40%. Security, observability and networking give it several ways to monetize the same customer relationships, while its lower multiple requires less perfection. Recent security work, the article notes, showed both companies must keep AI networks reliable after deployment.

What the outcome hinges on is whether AI networking growth stays elevated long enough to justify Arista's multiple, given its customer concentration. For investors already positioned in either name, the question is less about which company is winning than how much of that growth is already priced in.