⚠ Switching Costs Soften Against Sophisticated BuyersHigh threat

Arista's software switching costs are real and strong for typical customers, but they are far weaker against the sophisticated hyperscalers who drive most of its revenue — and that is exactly where the softness matters most. The cloud titans are the most capable network operators on earth, with vast engineering resources and a deliberate strategy of avoiding dependence on any single vendor. They build their own automation and abstraction layers, run multi-vendor networks by design, contribute to and adopt open, disaggregated networking software (so the operating system can be separated from the hardware), and generally engineer their operations precisely so that they are not locked into one supplier's software. For these customers, the switching costs that would deter an ordinary enterprise are a manageable engineering problem, not a real barrier.

This means Arista's stickiest moat element is thinnest where its revenue is most concentrated. The 42% of revenue from Microsoft and Meta, and the ~48% from the cloud and AI titans¹ generally, comes from exactly the buyers most able and most motivated to switch, dual-source, or build their own — so the software lock-in that protects Arista's broad base offers much less protection against the loss or reduction of its most important customers. Arista's software is genuinely excellent and its integration deep, so even the titans stay while it remains the best option, and switching a hyperscale network is never trivial even for them. But an investor should recognize that the switching-cost moat, robust for the many, is weak for the few giants that matter most — they engineer away from lock-in on purpose — so Arista must keep winning its largest customers on merit, generation after generation, rather than relying on switching costs to hold them, which is a core reason the concentration risk is so sharp and the moat narrow.