AWS backlog hits $578 billion, outpacing 39% revenue growth as capacity constraints persist

Amazon Web Services backlog reached $578 billion in the third quarter, growing at triple-digit rates while quarterly sales added only $3.8 billion. The backlog has nearly tripled from $200 billion a year earlier, outpacing 39.3% revenue growth. Analyst Brent Thill attributes the gap to data center and supply chain bottlenecks, with CEO Andy Jassy noting capacity constraints through 2027. Amazon plans to spend substantially more on infrastructure next year, raising 2026 capital expenditure guidance to $220 billion from $200 billion.